./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext2/complex_data_creation_test02-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/complex_data_creation_test02-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI --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 cb1edb9fb334d503cba549895692ff1d9d77f795ecc0798895274120b4ed179d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:29:13,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:29:13,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:29:13,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:29:13,583 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:29:13,586 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:29:13,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:29:13,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:29:13,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:29:13,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:29:13,601 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:29:13,603 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:29:13,604 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:29:13,606 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:29:13,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:29:13,610 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:29:13,611 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:29:13,612 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:29:13,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:29:13,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:29:13,622 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:29:13,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:29:13,626 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:29:13,627 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:29:13,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:29:13,635 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:29:13,636 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:29:13,637 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:29:13,638 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:29:13,639 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:29:13,640 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:29:13,641 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:29:13,644 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:29:13,645 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:29:13,646 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:29:13,646 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:29:13,647 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:29:13,647 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:29:13,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:29:13,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:29:13,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:29:13,649 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-03 03:29:13,691 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:29:13,691 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:29:13,692 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:29:13,692 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:29:13,692 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:29:13,693 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:29:13,693 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:29:13,693 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:29:13,693 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:29:13,693 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:29:13,693 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:29:13,694 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:29:13,694 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:29:13,694 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:29:13,694 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:29:13,694 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:29:13,697 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:29:13,697 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:29:13,698 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-03 03:29:13,698 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-03 03:29:13,698 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:29:13,698 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:29:13,698 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-03 03:29:13,699 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:29:13,699 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:29:13,699 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:29:13,699 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-03 03:29:13,700 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-03 03:29:13,700 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-03 03:29:13,701 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:29:13,701 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:29:13,701 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:29:13,701 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:29:13,701 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:29:13,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:29:13,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:29:13,703 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:29:13,703 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:29:13,703 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:29:13,703 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:29:13,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:29:13,703 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:29:13,719 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb1edb9fb334d503cba549895692ff1d9d77f795ecc0798895274120b4ed179d [2022-11-03 03:29:14,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:29:14,084 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:29:14,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:29:14,091 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:29:14,092 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:29:14,093 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/memsafety-ext2/complex_data_creation_test02-2.i [2022-11-03 03:29:14,171 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/data/0b72fb979/1e4b90670fc04e059410fc89e2369ac7/FLAG6d3141a96 [2022-11-03 03:29:14,813 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:29:14,813 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/sv-benchmarks/c/memsafety-ext2/complex_data_creation_test02-2.i [2022-11-03 03:29:14,825 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/data/0b72fb979/1e4b90670fc04e059410fc89e2369ac7/FLAG6d3141a96 [2022-11-03 03:29:15,069 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/data/0b72fb979/1e4b90670fc04e059410fc89e2369ac7 [2022-11-03 03:29:15,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:29:15,078 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:29:15,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:29:15,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:29:15,087 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:29:15,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:29:15" (1/1) ... [2022-11-03 03:29:15,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@467590e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:15, skipping insertion in model container [2022-11-03 03:29:15,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:29:15" (1/1) ... [2022-11-03 03:29:15,099 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:29:15,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:29:15,528 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:29:15,544 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-03 03:29:15,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@583e5fb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:15, skipping insertion in model container [2022-11-03 03:29:15,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:29:15,546 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-03 03:29:15,549 INFO L158 Benchmark]: Toolchain (without parser) took 469.63ms. Allocated memory is still 100.7MB. Free memory was 57.9MB in the beginning and 72.3MB in the end (delta: -14.4MB). Peak memory consumption was 4.4MB. Max. memory is 16.1GB. [2022-11-03 03:29:15,551 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 100.7MB. Free memory was 75.7MB in the beginning and 75.6MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:29:15,552 INFO L158 Benchmark]: CACSL2BoogieTranslator took 463.61ms. Allocated memory is still 100.7MB. Free memory was 57.7MB in the beginning and 72.3MB in the end (delta: -14.7MB). Peak memory consumption was 4.4MB. Max. memory is 16.1GB. [2022-11-03 03:29:15,554 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 100.7MB. Free memory was 75.7MB in the beginning and 75.6MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 463.61ms. Allocated memory is still 100.7MB. Free memory was 57.7MB in the beginning and 72.3MB in the end (delta: -14.7MB). Peak memory consumption was 4.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 556]: Unsupported Syntax Found a cast between two array/pointer types of different sizes 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/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/complex_data_creation_test02-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI --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 cb1edb9fb334d503cba549895692ff1d9d77f795ecc0798895274120b4ed179d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:29:17,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:29:17,858 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:29:17,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:29:17,901 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:29:17,902 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:29:17,903 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:29:17,905 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:29:17,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:29:17,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:29:17,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:29:17,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:29:17,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:29:17,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:29:17,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:29:17,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:29:17,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:29:17,916 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:29:17,918 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:29:17,921 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:29:17,923 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:29:17,924 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:29:17,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:29:17,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:29:17,931 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:29:17,931 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:29:17,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:29:17,932 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:29:17,933 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:29:17,934 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:29:17,935 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:29:17,935 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:29:17,936 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:29:17,937 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:29:17,938 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:29:17,939 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:29:17,940 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:29:17,940 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:29:17,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:29:17,941 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:29:17,942 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:29:17,943 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-03 03:29:17,968 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:29:17,969 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:29:17,969 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:29:17,969 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:29:17,970 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:29:17,970 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:29:17,971 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:29:17,971 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:29:17,971 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:29:17,972 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:29:17,972 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:29:17,972 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:29:17,973 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-03 03:29:17,973 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-03 03:29:17,973 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:29:17,974 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:29:17,974 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-03 03:29:17,974 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:29:17,974 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:29:17,975 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:29:17,975 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-03 03:29:17,975 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-03 03:29:17,975 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-03 03:29:17,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:29:17,976 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:29:17,976 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 03:29:17,976 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 03:29:17,977 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:29:17,977 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:29:17,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:29:17,977 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 03:29:17,978 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:29:17,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:29:17,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:29:17,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:29:17,979 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 03:29:17,979 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 03:29:17,979 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:29:17,979 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 03:29:17,979 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_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb1edb9fb334d503cba549895692ff1d9d77f795ecc0798895274120b4ed179d [2022-11-03 03:29:18,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:29:18,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:29:18,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:29:18,398 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:29:18,399 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:29:18,401 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/memsafety-ext2/complex_data_creation_test02-2.i [2022-11-03 03:29:18,497 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/data/49817f280/a12a354aa16d41d3b785818b51d1a199/FLAGb2e246db6 [2022-11-03 03:29:19,223 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:29:19,224 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/sv-benchmarks/c/memsafety-ext2/complex_data_creation_test02-2.i [2022-11-03 03:29:19,238 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/data/49817f280/a12a354aa16d41d3b785818b51d1a199/FLAGb2e246db6 [2022-11-03 03:29:19,472 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/data/49817f280/a12a354aa16d41d3b785818b51d1a199 [2022-11-03 03:29:19,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:29:19,476 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:29:19,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:29:19,479 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:29:19,489 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:29:19,490 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:29:19" (1/1) ... [2022-11-03 03:29:19,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ae2b5e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:19, skipping insertion in model container [2022-11-03 03:29:19,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:29:19" (1/1) ... [2022-11-03 03:29:19,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:29:19,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:29:19,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:29:20,008 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 03:29:20,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:29:20,084 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:29:20,097 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:29:20,170 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:29:20,205 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:29:20,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:20 WrapperNode [2022-11-03 03:29:20,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:29:20,207 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:29:20,208 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:29:20,208 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:29:20,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:20" (1/1) ... [2022-11-03 03:29:20,256 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:20" (1/1) ... [2022-11-03 03:29:20,291 INFO L138 Inliner]: procedures = 129, calls = 62, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 98 [2022-11-03 03:29:20,292 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:29:20,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:29:20,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:29:20,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:29:20,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:20" (1/1) ... [2022-11-03 03:29:20,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:20" (1/1) ... [2022-11-03 03:29:20,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:20" (1/1) ... [2022-11-03 03:29:20,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:20" (1/1) ... [2022-11-03 03:29:20,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:20" (1/1) ... [2022-11-03 03:29:20,330 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:20" (1/1) ... [2022-11-03 03:29:20,333 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:20" (1/1) ... [2022-11-03 03:29:20,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:20" (1/1) ... [2022-11-03 03:29:20,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:29:20,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:29:20,340 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:29:20,340 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:29:20,341 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:20" (1/1) ... [2022-11-03 03:29:20,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:29:20,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:20,383 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:29:20,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:29:20,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-03 03:29:20,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 03:29:20,435 INFO L130 BoogieDeclarations]: Found specification of procedure create_data [2022-11-03 03:29:20,436 INFO L138 BoogieDeclarations]: Found implementation of procedure create_data [2022-11-03 03:29:20,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:29:20,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:29:20,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 03:29:20,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 03:29:20,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:29:20,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-03 03:29:20,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 03:29:20,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 03:29:20,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:29:20,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:29:20,576 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:29:20,578 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:29:21,678 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:29:21,693 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:29:21,694 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-03 03:29:21,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:29:21 BoogieIcfgContainer [2022-11-03 03:29:21,698 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:29:21,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:29:21,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:29:21,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:29:21,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:29:19" (1/3) ... [2022-11-03 03:29:21,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38b8916d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:29:21, skipping insertion in model container [2022-11-03 03:29:21,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:20" (2/3) ... [2022-11-03 03:29:21,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38b8916d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:29:21, skipping insertion in model container [2022-11-03 03:29:21,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:29:21" (3/3) ... [2022-11-03 03:29:21,715 INFO L112 eAbstractionObserver]: Analyzing ICFG complex_data_creation_test02-2.i [2022-11-03 03:29:21,736 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:29:21,736 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 92 error locations. [2022-11-03 03:29:21,802 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:29:21,809 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@180db38, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:29:21,810 INFO L358 AbstractCegarLoop]: Starting to check reachability of 92 error locations. [2022-11-03 03:29:21,818 INFO L276 IsEmpty]: Start isEmpty. Operand has 189 states, 93 states have (on average 2.161290322580645) internal successors, (201), 185 states have internal predecessors, (201), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:29:21,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 03:29:21,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:21,827 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 03:29:21,829 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:29:21,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:21,837 INFO L85 PathProgramCache]: Analyzing trace with hash 5052905, now seen corresponding path program 1 times [2022-11-03 03:29:21,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:21,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218334193] [2022-11-03 03:29:21,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:21,854 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:21,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:21,862 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:21,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 03:29:21,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:21,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 03:29:21,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:22,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:22,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:22,014 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:22,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218334193] [2022-11-03 03:29:22,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1218334193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:22,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:22,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:29:22,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264534159] [2022-11-03 03:29:22,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:22,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 03:29:22,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:22,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 03:29:22,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:29:22,055 INFO L87 Difference]: Start difference. First operand has 189 states, 93 states have (on average 2.161290322580645) internal successors, (201), 185 states have internal predecessors, (201), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-03 03:29:22,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:22,094 INFO L93 Difference]: Finished difference Result 189 states and 200 transitions. [2022-11-03 03:29:22,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 03:29:22,097 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2022-11-03 03:29:22,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:22,107 INFO L225 Difference]: With dead ends: 189 [2022-11-03 03:29:22,107 INFO L226 Difference]: Without dead ends: 187 [2022-11-03 03:29:22,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:29:22,113 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:22,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:29:22,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-11-03 03:29:22,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-11-03 03:29:22,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 92 states have (on average 2.108695652173913) internal successors, (194), 183 states have internal predecessors, (194), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:29:22,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 198 transitions. [2022-11-03 03:29:22,171 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 198 transitions. Word has length 4 [2022-11-03 03:29:22,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:22,171 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 198 transitions. [2022-11-03 03:29:22,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-03 03:29:22,172 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 198 transitions. [2022-11-03 03:29:22,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 03:29:22,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:22,172 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 03:29:22,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-03 03:29:22,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:22,375 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:29:22,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:22,376 INFO L85 PathProgramCache]: Analyzing trace with hash 5050693, now seen corresponding path program 1 times [2022-11-03 03:29:22,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:22,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518595106] [2022-11-03 03:29:22,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:22,377 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:22,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:22,379 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:22,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 03:29:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:22,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:29:22,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:22,536 INFO L390 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 7 [2022-11-03 03:29:22,597 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:29:22,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-03 03:29:22,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:22,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:22,627 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:22,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518595106] [2022-11-03 03:29:22,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518595106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:22,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:22,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:29:22,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037993721] [2022-11-03 03:29:22,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:22,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:22,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:22,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:22,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:22,639 INFO L87 Difference]: Start difference. First operand 187 states and 198 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 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) [2022-11-03 03:29:23,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:23,367 INFO L93 Difference]: Finished difference Result 207 states and 219 transitions. [2022-11-03 03:29:23,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:29:23,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 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 4 [2022-11-03 03:29:23,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:23,369 INFO L225 Difference]: With dead ends: 207 [2022-11-03 03:29:23,370 INFO L226 Difference]: Without dead ends: 207 [2022-11-03 03:29:23,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:23,371 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 149 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:23,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 287 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:29:23,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-03 03:29:23,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 181. [2022-11-03 03:29:23,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 92 states have (on average 2.0434782608695654) internal successors, (188), 177 states have internal predecessors, (188), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:29:23,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 192 transitions. [2022-11-03 03:29:23,386 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 192 transitions. Word has length 4 [2022-11-03 03:29:23,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:23,386 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 192 transitions. [2022-11-03 03:29:23,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 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) [2022-11-03 03:29:23,387 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 192 transitions. [2022-11-03 03:29:23,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 03:29:23,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:23,388 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 03:29:23,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:23,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:23,599 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:29:23,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:23,600 INFO L85 PathProgramCache]: Analyzing trace with hash 5050694, now seen corresponding path program 1 times [2022-11-03 03:29:23,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:23,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1016752535] [2022-11-03 03:29:23,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:23,601 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:23,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:23,606 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:23,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 03:29:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:23,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:29:23,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:23,718 INFO L390 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 [2022-11-03 03:29:23,732 INFO L390 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 7 [2022-11-03 03:29:23,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:23,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 03:29:23,828 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 03:29:23,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 03:29:23,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:23,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:23,863 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:23,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1016752535] [2022-11-03 03:29:23,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1016752535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:23,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:23,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:29:23,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97832552] [2022-11-03 03:29:23,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:23,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:23,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:23,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:23,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:23,870 INFO L87 Difference]: Start difference. First operand 181 states and 192 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 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) [2022-11-03 03:29:24,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:24,804 INFO L93 Difference]: Finished difference Result 197 states and 211 transitions. [2022-11-03 03:29:24,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:29:24,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 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 4 [2022-11-03 03:29:24,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:24,811 INFO L225 Difference]: With dead ends: 197 [2022-11-03 03:29:24,811 INFO L226 Difference]: Without dead ends: 197 [2022-11-03 03:29:24,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:24,812 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 28 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:24,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 344 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 03:29:24,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-03 03:29:24,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 186. [2022-11-03 03:29:24,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 182 states have internal predecessors, (195), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:29:24,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 199 transitions. [2022-11-03 03:29:24,837 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 199 transitions. Word has length 4 [2022-11-03 03:29:24,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:24,838 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 199 transitions. [2022-11-03 03:29:24,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 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) [2022-11-03 03:29:24,838 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 199 transitions. [2022-11-03 03:29:24,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 03:29:24,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:24,839 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 03:29:24,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:25,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:25,051 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:29:25,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:25,052 INFO L85 PathProgramCache]: Analyzing trace with hash 156571597, now seen corresponding path program 1 times [2022-11-03 03:29:25,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:25,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1096309763] [2022-11-03 03:29:25,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:25,053 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:25,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:25,058 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:25,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 03:29:25,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:25,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:29:25,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:25,132 INFO L390 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 7 [2022-11-03 03:29:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:25,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:25,142 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:25,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1096309763] [2022-11-03 03:29:25,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1096309763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:25,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:25,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:29:25,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108003303] [2022-11-03 03:29:25,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:25,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:29:25,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:25,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:29:25,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:29:25,146 INFO L87 Difference]: Start difference. First operand 186 states and 199 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-11-03 03:29:25,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:25,564 INFO L93 Difference]: Finished difference Result 209 states and 222 transitions. [2022-11-03 03:29:25,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:29:25,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2022-11-03 03:29:25,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:25,568 INFO L225 Difference]: With dead ends: 209 [2022-11-03 03:29:25,568 INFO L226 Difference]: Without dead ends: 209 [2022-11-03 03:29:25,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:29:25,570 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 64 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:25,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 232 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:29:25,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-11-03 03:29:25,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 184. [2022-11-03 03:29:25,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 97 states have (on average 1.9793814432989691) internal successors, (192), 180 states have internal predecessors, (192), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:29:25,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 196 transitions. [2022-11-03 03:29:25,581 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 196 transitions. Word has length 5 [2022-11-03 03:29:25,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:25,581 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 196 transitions. [2022-11-03 03:29:25,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-11-03 03:29:25,582 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 196 transitions. [2022-11-03 03:29:25,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 03:29:25,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:25,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 03:29:25,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:25,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:25,794 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:29:25,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:25,795 INFO L85 PathProgramCache]: Analyzing trace with hash 156571598, now seen corresponding path program 1 times [2022-11-03 03:29:25,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:25,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1690431430] [2022-11-03 03:29:25,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:25,796 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:25,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:25,797 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:25,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 03:29:25,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:25,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:29:25,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:25,897 INFO L390 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 [2022-11-03 03:29:25,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:25,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:25,915 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:25,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1690431430] [2022-11-03 03:29:25,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1690431430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:25,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:25,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:29:25,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854989223] [2022-11-03 03:29:25,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:25,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:29:25,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:25,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:29:25,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:29:25,918 INFO L87 Difference]: Start difference. First operand 184 states and 196 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-11-03 03:29:26,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:26,393 INFO L93 Difference]: Finished difference Result 182 states and 193 transitions. [2022-11-03 03:29:26,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:29:26,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2022-11-03 03:29:26,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:26,395 INFO L225 Difference]: With dead ends: 182 [2022-11-03 03:29:26,395 INFO L226 Difference]: Without dead ends: 182 [2022-11-03 03:29:26,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:29:26,396 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 11 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:26,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 273 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:29:26,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-03 03:29:26,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-11-03 03:29:26,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 97 states have (on average 1.9484536082474226) internal successors, (189), 178 states have internal predecessors, (189), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:29:26,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 193 transitions. [2022-11-03 03:29:26,407 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 193 transitions. Word has length 5 [2022-11-03 03:29:26,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:26,407 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 193 transitions. [2022-11-03 03:29:26,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-11-03 03:29:26,408 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 193 transitions. [2022-11-03 03:29:26,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 03:29:26,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:26,409 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:26,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-11-03 03:29:26,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:26,621 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:29:26,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:26,621 INFO L85 PathProgramCache]: Analyzing trace with hash 666573431, now seen corresponding path program 1 times [2022-11-03 03:29:26,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:26,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099899475] [2022-11-03 03:29:26,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:26,622 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:26,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:26,623 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:26,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 03:29:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:26,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:29:26,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:26,764 INFO L390 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 7 [2022-11-03 03:29:26,803 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 03:29:26,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 03:29:26,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 03:29:26,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 03:29:26,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-03 03:29:26,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-03 03:29:26,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:26,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:26,949 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:26,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099899475] [2022-11-03 03:29:26,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099899475] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:26,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:26,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:29:26,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864309291] [2022-11-03 03:29:26,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:26,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:29:26,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:26,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:29:26,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:29:26,952 INFO L87 Difference]: Start difference. First operand 182 states and 193 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) 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) [2022-11-03 03:29:27,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:27,590 INFO L93 Difference]: Finished difference Result 184 states and 196 transitions. [2022-11-03 03:29:27,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:29:27,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) 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 10 [2022-11-03 03:29:27,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:27,591 INFO L225 Difference]: With dead ends: 184 [2022-11-03 03:29:27,591 INFO L226 Difference]: Without dead ends: 184 [2022-11-03 03:29:27,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:29:27,592 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 5 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:27,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 606 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:29:27,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-03 03:29:27,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2022-11-03 03:29:27,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 98 states have (on average 1.9387755102040816) internal successors, (190), 179 states have internal predecessors, (190), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:29:27,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 194 transitions. [2022-11-03 03:29:27,611 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 194 transitions. Word has length 10 [2022-11-03 03:29:27,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:27,612 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 194 transitions. [2022-11-03 03:29:27,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) 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) [2022-11-03 03:29:27,612 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 194 transitions. [2022-11-03 03:29:27,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 03:29:27,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:27,613 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:27,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:27,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:27,813 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:29:27,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:27,814 INFO L85 PathProgramCache]: Analyzing trace with hash 623653565, now seen corresponding path program 1 times [2022-11-03 03:29:27,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:27,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011525397] [2022-11-03 03:29:27,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:27,815 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:27,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:27,816 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:27,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 03:29:27,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:27,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:29:27,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:27,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:27,960 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:27,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011525397] [2022-11-03 03:29:27,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011525397] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:27,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:27,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:27,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585193234] [2022-11-03 03:29:27,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:27,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:27,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:27,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:27,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:27,962 INFO L87 Difference]: Start difference. First operand 183 states and 194 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:28,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:28,005 INFO L93 Difference]: Finished difference Result 260 states and 275 transitions. [2022-11-03 03:29:28,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:29:28,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-03 03:29:28,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:28,007 INFO L225 Difference]: With dead ends: 260 [2022-11-03 03:29:28,007 INFO L226 Difference]: Without dead ends: 260 [2022-11-03 03:29:28,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:28,008 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 80 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:28,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 548 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:29:28,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-11-03 03:29:28,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 224. [2022-11-03 03:29:28,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 138 states have (on average 1.963768115942029) internal successors, (271), 219 states have internal predecessors, (271), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:29:28,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 275 transitions. [2022-11-03 03:29:28,018 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 275 transitions. Word has length 12 [2022-11-03 03:29:28,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:28,019 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 275 transitions. [2022-11-03 03:29:28,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:28,019 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 275 transitions. [2022-11-03 03:29:28,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 03:29:28,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:28,020 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:28,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:28,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:28,234 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting create_dataErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:29:28,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:28,234 INFO L85 PathProgramCache]: Analyzing trace with hash -2141569776, now seen corresponding path program 1 times [2022-11-03 03:29:28,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:28,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1515464970] [2022-11-03 03:29:28,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:28,235 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:28,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:28,236 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:28,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 03:29:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:28,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:29:28,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:28,344 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:29:28,344 INFO L390 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-03 03:29:28,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:28,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:28,363 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:28,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1515464970] [2022-11-03 03:29:28,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1515464970] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:28,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:28,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:29:28,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601231304] [2022-11-03 03:29:28,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:28,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:29:28,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:28,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:29:28,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:29:28,365 INFO L87 Difference]: Start difference. First operand 224 states and 275 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:28,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:28,762 INFO L93 Difference]: Finished difference Result 227 states and 271 transitions. [2022-11-03 03:29:28,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:29:28,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 03:29:28,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:28,764 INFO L225 Difference]: With dead ends: 227 [2022-11-03 03:29:28,764 INFO L226 Difference]: Without dead ends: 227 [2022-11-03 03:29:28,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:29:28,765 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 62 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:28,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 202 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:29:28,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-03 03:29:28,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 218. [2022-11-03 03:29:28,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 144 states have (on average 1.8125) internal successors, (261), 213 states have internal predecessors, (261), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:29:28,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 265 transitions. [2022-11-03 03:29:28,773 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 265 transitions. Word has length 13 [2022-11-03 03:29:28,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:28,773 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 265 transitions. [2022-11-03 03:29:28,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:28,773 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 265 transitions. [2022-11-03 03:29:28,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 03:29:28,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:28,774 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:28,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:28,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:28,986 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting create_dataErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:29:28,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:28,987 INFO L85 PathProgramCache]: Analyzing trace with hash -2141569775, now seen corresponding path program 1 times [2022-11-03 03:29:28,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:28,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [579464273] [2022-11-03 03:29:28,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:28,988 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:28,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:28,989 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:28,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 03:29:29,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:29,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:29:29,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:29,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:29,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-03 03:29:29,125 INFO L390 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 10 treesize of output 8 [2022-11-03 03:29:29,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:29,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:29,136 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:29,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [579464273] [2022-11-03 03:29:29,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [579464273] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:29,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:29,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:29:29,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490604562] [2022-11-03 03:29:29,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:29,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:29:29,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:29,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:29:29,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:29:29,138 INFO L87 Difference]: Start difference. First operand 218 states and 265 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:29,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:29,671 INFO L93 Difference]: Finished difference Result 239 states and 279 transitions. [2022-11-03 03:29:29,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:29:29,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 03:29:29,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:29,673 INFO L225 Difference]: With dead ends: 239 [2022-11-03 03:29:29,673 INFO L226 Difference]: Without dead ends: 239 [2022-11-03 03:29:29,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:29:29,674 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 49 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:29,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 212 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:29:29,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-03 03:29:29,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 219. [2022-11-03 03:29:29,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 154 states have (on average 1.655844155844156) internal successors, (255), 214 states have internal predecessors, (255), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:29:29,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 259 transitions. [2022-11-03 03:29:29,680 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 259 transitions. Word has length 13 [2022-11-03 03:29:29,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:29,681 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 259 transitions. [2022-11-03 03:29:29,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:29,681 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 259 transitions. [2022-11-03 03:29:29,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 03:29:29,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:29,681 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:29,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:29,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:29,882 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting create_dataErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:29:29,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:29,883 INFO L85 PathProgramCache]: Analyzing trace with hash 533828155, now seen corresponding path program 1 times [2022-11-03 03:29:29,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:29,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [480046329] [2022-11-03 03:29:29,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:29,883 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:29,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:29,884 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:29,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 03:29:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:29,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:29:29,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:30,012 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:29:30,012 INFO L390 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 1 case distinctions, treesize of input 9 treesize of output 19 [2022-11-03 03:29:30,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:29:30,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 11 [2022-11-03 03:29:30,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:30,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:30,085 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:30,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [480046329] [2022-11-03 03:29:30,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [480046329] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:30,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:30,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:30,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713885606] [2022-11-03 03:29:30,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:30,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:29:30,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:30,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:29:30,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:30,087 INFO L87 Difference]: Start difference. First operand 219 states and 259 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:30,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:30,901 INFO L93 Difference]: Finished difference Result 270 states and 323 transitions. [2022-11-03 03:29:30,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:29:30,902 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-03 03:29:30,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:30,904 INFO L225 Difference]: With dead ends: 270 [2022-11-03 03:29:30,904 INFO L226 Difference]: Without dead ends: 270 [2022-11-03 03:29:30,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:29:30,905 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 25 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:30,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 413 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 03:29:30,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-11-03 03:29:30,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 225. [2022-11-03 03:29:30,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 160 states have (on average 1.65625) internal successors, (265), 220 states have internal predecessors, (265), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:29:30,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 269 transitions. [2022-11-03 03:29:30,913 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 269 transitions. Word has length 17 [2022-11-03 03:29:30,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:30,914 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 269 transitions. [2022-11-03 03:29:30,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:30,914 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 269 transitions. [2022-11-03 03:29:30,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 03:29:30,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:30,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:30,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:31,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:31,127 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting create_dataErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:29:31,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:31,127 INFO L85 PathProgramCache]: Analyzing trace with hash 533828156, now seen corresponding path program 1 times [2022-11-03 03:29:31,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:31,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1409450062] [2022-11-03 03:29:31,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:31,128 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:31,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:31,129 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:31,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 03:29:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:31,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 03:29:31,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:31,269 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:29:31,270 INFO L390 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-03 03:29:31,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:29:31,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:29:31,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 9 [2022-11-03 03:29:31,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-11-03 03:29:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:31,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:31,432 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:31,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1409450062] [2022-11-03 03:29:31,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1409450062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:31,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:31,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:29:31,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191160606] [2022-11-03 03:29:31,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:31,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:29:31,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:31,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:29:31,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:29:31,434 INFO L87 Difference]: Start difference. First operand 225 states and 269 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:32,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:32,342 INFO L93 Difference]: Finished difference Result 227 states and 267 transitions. [2022-11-03 03:29:32,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:29:32,344 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-03 03:29:32,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:32,345 INFO L225 Difference]: With dead ends: 227 [2022-11-03 03:29:32,345 INFO L226 Difference]: Without dead ends: 227 [2022-11-03 03:29:32,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:29:32,346 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 5 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:32,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 424 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 03:29:32,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-03 03:29:32,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 225. [2022-11-03 03:29:32,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 160 states have (on average 1.63125) internal successors, (261), 220 states have internal predecessors, (261), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:29:32,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 265 transitions. [2022-11-03 03:29:32,358 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 265 transitions. Word has length 17 [2022-11-03 03:29:32,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:32,358 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 265 transitions. [2022-11-03 03:29:32,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:32,358 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 265 transitions. [2022-11-03 03:29:32,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 03:29:32,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:32,359 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:32,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:32,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:32,573 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting create_dataErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:29:32,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:32,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1553049946, now seen corresponding path program 1 times [2022-11-03 03:29:32,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:32,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111563962] [2022-11-03 03:29:32,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:32,574 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:32,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:32,574 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:32,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 03:29:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:32,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 03:29:32,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:32,783 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:29:32,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2022-11-03 03:29:32,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:29:32,971 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:29:32,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2022-11-03 03:29:33,044 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 33 treesize of output 15 [2022-11-03 03:29:33,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:29:33,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:33,148 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_178 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_create_data_#t~mem9.base| v_ArrVal_178) c_create_data_~data~0.base) (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (_ bv1 1)))) is different from false [2022-11-03 03:29:33,176 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_178 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (select |c_#valid| (let ((.cse0 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse0) v_ArrVal_178) c_create_data_~data~0.base) .cse0))) (_ bv1 1)) (_ bv0 1))) is different from false [2022-11-03 03:29:33,204 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:33,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-11-03 03:29:33,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 44 treesize of output 32 [2022-11-03 03:29:33,221 INFO L390 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 11 treesize of output 7 [2022-11-03 03:29:33,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-03 03:29:33,280 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:33,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111563962] [2022-11-03 03:29:33,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111563962] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:33,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [686354092] [2022-11-03 03:29:33,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:33,281 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:29:33,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:29:33,284 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:29:33,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-03 03:29:33,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:33,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:29:33,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:33,637 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:29:33,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2022-11-03 03:29:33,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:29:33,811 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:29:33,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2022-11-03 03:29:33,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 33 treesize of output 15 [2022-11-03 03:29:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:29:33,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:33,985 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_220 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (select |c_#valid| (let ((.cse0 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse0) v_ArrVal_220) c_create_data_~data~0.base) .cse0))) (_ bv1 1)) (_ bv0 1))) is different from false [2022-11-03 03:29:34,010 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:34,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-11-03 03:29:34,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 44 treesize of output 32 [2022-11-03 03:29:34,018 INFO L390 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 11 treesize of output 7 [2022-11-03 03:29:34,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-03 03:29:34,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [686354092] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:34,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594445649] [2022-11-03 03:29:34,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:34,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:34,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:34,056 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:34,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 03:29:34,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:34,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:29:34,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:34,223 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:29:34,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2022-11-03 03:29:34,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:29:34,299 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:29:34,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2022-11-03 03:29:34,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 33 treesize of output 15 [2022-11-03 03:29:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:29:34,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:34,491 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:34,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-11-03 03:29:34,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 44 treesize of output 32 [2022-11-03 03:29:34,500 INFO L390 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 11 treesize of output 7 [2022-11-03 03:29:34,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-03 03:29:34,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594445649] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:34,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:29:34,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5, 6, 5, 6] total 15 [2022-11-03 03:29:34,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398999189] [2022-11-03 03:29:34,553 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:34,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 03:29:34,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:34,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 03:29:34,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=115, Unknown=6, NotChecked=72, Total=240 [2022-11-03 03:29:34,554 INFO L87 Difference]: Start difference. First operand 225 states and 265 transitions. Second operand has 16 states, 15 states have (on average 3.0) internal successors, (45), 16 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:35,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:35,442 INFO L93 Difference]: Finished difference Result 232 states and 269 transitions. [2022-11-03 03:29:35,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:29:35,443 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 16 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-03 03:29:35,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:35,445 INFO L225 Difference]: With dead ends: 232 [2022-11-03 03:29:35,445 INFO L226 Difference]: Without dead ends: 232 [2022-11-03 03:29:35,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=133, Unknown=6, NotChecked=78, Total=272 [2022-11-03 03:29:35,446 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 72 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 486 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:35,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 762 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 244 Invalid, 0 Unknown, 486 Unchecked, 0.8s Time] [2022-11-03 03:29:35,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-11-03 03:29:35,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 224. [2022-11-03 03:29:35,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 160 states have (on average 1.61875) internal successors, (259), 219 states have internal predecessors, (259), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:29:35,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 263 transitions. [2022-11-03 03:29:35,456 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 263 transitions. Word has length 22 [2022-11-03 03:29:35,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:35,457 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 263 transitions. [2022-11-03 03:29:35,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 16 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:35,457 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 263 transitions. [2022-11-03 03:29:35,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 03:29:35,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:35,458 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:35,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:35,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:35,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:36,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:29:36,073 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting create_dataErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:29:36,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:36,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1553049945, now seen corresponding path program 1 times [2022-11-03 03:29:36,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:36,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283558162] [2022-11-03 03:29:36,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:36,074 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:36,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:36,075 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:36,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 03:29:36,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:36,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:29:36,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:36,313 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:29:36,314 INFO L390 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-03 03:29:36,324 INFO L390 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 10 treesize of output 8 [2022-11-03 03:29:36,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:29:36,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:29:36,562 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:29:36,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-11-03 03:29:36,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-03 03:29:36,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 31 treesize of output 13 [2022-11-03 03:29:36,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 03:29:36,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:36,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:37,337 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (bvmul c_create_data_~counter~0 (_ bv4 32))) (.cse0 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (and (forall ((v_ArrVal_307 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_308 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_create_data_#t~mem9.base| v_ArrVal_308) c_create_data_~data~0.base) .cse0) .cse1) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_create_data_#t~mem9.base| v_ArrVal_307) c_create_data_~data~0.base) .cse0)))) (forall ((v_ArrVal_308 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (select (select (store |c_#memory_$Pointer$.offset| |c_create_data_#t~mem9.base| v_ArrVal_308) c_create_data_~data~0.base) .cse0))) (bvule (bvadd (_ bv4 32) .cse2 .cse1) (bvadd (_ bv8 32) .cse2 .cse1)))))) is different from false [2022-11-03 03:29:37,410 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse2 (bvmul c_create_data_~counter~0 (_ bv4 32))) (.cse0 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse1))) (and (forall ((v_ArrVal_307 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_308 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_308) c_create_data_~data~0.base) .cse1) .cse2) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_307) c_create_data_~data~0.base) .cse1)))) (forall ((v_ArrVal_308 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_308) c_create_data_~data~0.base) .cse1))) (bvule (bvadd (_ bv4 32) .cse3 .cse2) (bvadd (_ bv8 32) .cse3 .cse2))))))) is different from false [2022-11-03 03:29:37,483 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse2))) (and (forall ((v_ArrVal_308 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_308) c_create_data_~data~0.base) .cse2))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_307 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_308 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_308) c_create_data_~data~0.base) .cse2)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_307) c_create_data_~data~0.base) .cse2))))))) is different from false [2022-11-03 03:29:37,505 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:37,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 46 [2022-11-03 03:29:37,517 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:37,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2022-11-03 03:29:37,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 62 treesize of output 50 [2022-11-03 03:29:37,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 96 treesize of output 78 [2022-11-03 03:29:37,539 INFO L390 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 40 treesize of output 32 [2022-11-03 03:29:37,542 INFO L390 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 66 treesize of output 58 [2022-11-03 03:29:37,718 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:37,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 36 [2022-11-03 03:29:37,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 54 treesize of output 36 [2022-11-03 03:29:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-03 03:29:37,847 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:37,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283558162] [2022-11-03 03:29:37,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283558162] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:37,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [232954714] [2022-11-03 03:29:37,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:37,848 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:29:37,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:29:37,851 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:29:37,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-03 03:29:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:38,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 03:29:38,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:38,249 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:29:38,249 INFO L390 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-03 03:29:38,259 INFO L390 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 10 treesize of output 8 [2022-11-03 03:29:38,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:29:38,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:29:38,392 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:29:38,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-11-03 03:29:38,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-03 03:29:38,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 31 treesize of output 13 [2022-11-03 03:29:38,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 03:29:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:38,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:38,719 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (bvmul c_create_data_~counter~0 (_ bv4 32))) (.cse0 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (and (forall ((v_ArrVal_352 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_353 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_create_data_#t~mem9.base| v_ArrVal_353) c_create_data_~data~0.base) .cse0) .cse1) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_create_data_#t~mem9.base| v_ArrVal_352) c_create_data_~data~0.base) .cse0)))) (forall ((v_ArrVal_353 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (select (select (store |c_#memory_$Pointer$.offset| |c_create_data_#t~mem9.base| v_ArrVal_353) c_create_data_~data~0.base) .cse0))) (bvule (bvadd (_ bv4 32) .cse2 .cse1) (bvadd (_ bv8 32) .cse2 .cse1)))))) is different from false [2022-11-03 03:29:38,779 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse2 (bvmul c_create_data_~counter~0 (_ bv4 32))) (.cse0 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse1))) (and (forall ((v_ArrVal_352 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_353 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_353) c_create_data_~data~0.base) .cse1) (_ bv8 32) .cse2) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_352) c_create_data_~data~0.base) .cse1)))) (forall ((v_ArrVal_353 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_353) c_create_data_~data~0.base) .cse1))) (bvule (bvadd .cse3 (_ bv4 32) .cse2) (bvadd .cse3 (_ bv8 32) .cse2))))))) is different from false [2022-11-03 03:29:38,847 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse2))) (and (forall ((v_ArrVal_353 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_353) c_create_data_~data~0.base) .cse2))) (bvule (bvadd .cse0 (_ bv4 32)) (bvadd .cse0 (_ bv8 32))))) (forall ((v_ArrVal_352 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_353 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_353) c_create_data_~data~0.base) .cse2) (_ bv8 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_352) c_create_data_~data~0.base) .cse2))))))) is different from false [2022-11-03 03:29:38,871 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:38,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 36 [2022-11-03 03:29:38,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 54 treesize of output 36 [2022-11-03 03:29:38,907 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:38,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 46 [2022-11-03 03:29:38,923 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:38,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2022-11-03 03:29:38,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:38,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-11-03 03:29:38,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:38,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2022-11-03 03:29:38,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-03 03:29:38,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [232954714] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:38,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809026994] [2022-11-03 03:29:38,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:38,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:38,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:38,957 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:38,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 03:29:39,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:39,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 03:29:39,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:39,139 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:29:39,139 INFO L390 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-03 03:29:39,147 INFO L390 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 10 treesize of output 8 [2022-11-03 03:29:39,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:29:39,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:29:39,264 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:29:39,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-11-03 03:29:39,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-03 03:29:39,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 31 treesize of output 13 [2022-11-03 03:29:39,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 03:29:39,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:39,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:39,574 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (bvmul c_create_data_~counter~0 (_ bv4 32))) (.cse2 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (and (forall ((v_ArrVal_398 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_create_data_#t~mem9.base| v_ArrVal_398) c_create_data_~data~0.base) .cse2))) (bvule (bvadd (_ bv4 32) .cse0 .cse1) (bvadd (_ bv8 32) .cse0 .cse1)))) (forall ((v_ArrVal_398 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_397 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_create_data_#t~mem9.base| v_ArrVal_398) c_create_data_~data~0.base) .cse2) .cse1) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_create_data_#t~mem9.base| v_ArrVal_397) c_create_data_~data~0.base) .cse2)))))) is different from false [2022-11-03 03:29:39,642 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse0 (bvmul c_create_data_~counter~0 (_ bv4 32))) (.cse2 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse3))) (and (forall ((v_ArrVal_398 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| .cse2 v_ArrVal_398) c_create_data_~data~0.base) .cse3))) (bvule (bvadd (_ bv4 32) .cse0 .cse1) (bvadd (_ bv8 32) .cse0 .cse1)))) (forall ((v_ArrVal_398 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_397 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) .cse0 (select (select (store |c_#memory_$Pointer$.offset| .cse2 v_ArrVal_398) c_create_data_~data~0.base) .cse3)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_397) c_create_data_~data~0.base) .cse3))))))) is different from false [2022-11-03 03:29:39,714 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse1))) (and (forall ((v_ArrVal_398 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_397 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_398) c_create_data_~data~0.base) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_397) c_create_data_~data~0.base) .cse1)))) (forall ((v_ArrVal_398 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_398) c_create_data_~data~0.base) .cse1))) (bvule (bvadd (_ bv4 32) .cse2) (bvadd (_ bv8 32) .cse2))))))) is different from false [2022-11-03 03:29:39,733 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:39,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 46 [2022-11-03 03:29:39,746 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:39,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2022-11-03 03:29:39,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 62 treesize of output 50 [2022-11-03 03:29:39,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 96 treesize of output 78 [2022-11-03 03:29:39,771 INFO L390 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 40 treesize of output 32 [2022-11-03 03:29:39,776 INFO L390 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 66 treesize of output 58 [2022-11-03 03:29:39,922 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:39,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 36 [2022-11-03 03:29:39,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 54 treesize of output 36 [2022-11-03 03:29:40,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-03 03:29:40,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809026994] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:40,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:29:40,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7, 8, 7, 8] total 20 [2022-11-03 03:29:40,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474178280] [2022-11-03 03:29:40,061 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:40,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 03:29:40,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:40,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 03:29:40,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=108, Unknown=9, NotChecked=252, Total=420 [2022-11-03 03:29:40,062 INFO L87 Difference]: Start difference. First operand 224 states and 263 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:44,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:44,359 INFO L93 Difference]: Finished difference Result 236 states and 275 transitions. [2022-11-03 03:29:44,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 03:29:44,361 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-03 03:29:44,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:44,362 INFO L225 Difference]: With dead ends: 236 [2022-11-03 03:29:44,362 INFO L226 Difference]: Without dead ends: 236 [2022-11-03 03:29:44,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 107 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=72, Invalid=165, Unknown=9, NotChecked=306, Total=552 [2022-11-03 03:29:44,363 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 13 mSDsluCounter, 1249 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1411 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 799 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:44,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1411 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 505 Invalid, 0 Unknown, 799 Unchecked, 3.5s Time] [2022-11-03 03:29:44,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-11-03 03:29:44,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2022-11-03 03:29:44,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 170 states have (on average 1.5823529411764705) internal successors, (269), 229 states have internal predecessors, (269), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:29:44,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 273 transitions. [2022-11-03 03:29:44,370 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 273 transitions. Word has length 22 [2022-11-03 03:29:44,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:44,371 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 273 transitions. [2022-11-03 03:29:44,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:44,371 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 273 transitions. [2022-11-03 03:29:44,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 03:29:44,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:44,372 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:44,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:44,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:44,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:44,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:29:44,988 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting create_dataErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:29:44,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:44,989 INFO L85 PathProgramCache]: Analyzing trace with hash 767728924, now seen corresponding path program 2 times [2022-11-03 03:29:44,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:44,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877094013] [2022-11-03 03:29:44,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:29:44,989 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:44,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:44,990 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:44,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 03:29:45,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:29:45,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:29:45,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 03:29:45,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:45,279 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:29:45,280 INFO L390 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-03 03:29:45,289 INFO L390 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 10 treesize of output 8 [2022-11-03 03:29:45,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:29:45,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:29:45,522 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:29:45,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-11-03 03:29:45,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-03 03:29:45,729 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:29:45,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-11-03 03:29:45,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-03 03:29:45,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 31 treesize of output 13 [2022-11-03 03:29:45,890 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 03:29:45,927 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:45,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:46,499 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (bvmul c_create_data_~counter~0 (_ bv4 32))) (.cse2 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (and (forall ((v_ArrVal_460 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_create_data_#t~mem9.base| v_ArrVal_460) c_create_data_~data~0.base) .cse2))) (bvule (bvadd (_ bv4 32) .cse0 .cse1) (bvadd (_ bv8 32) .cse0 .cse1)))) (forall ((v_ArrVal_460 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_461 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_create_data_#t~mem9.base| v_ArrVal_460) c_create_data_~data~0.base) .cse2) .cse1) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_create_data_#t~mem9.base| v_ArrVal_461) c_create_data_~data~0.base) .cse2)))))) is different from false [2022-11-03 03:29:46,568 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse2 (bvmul c_create_data_~counter~0 (_ bv4 32))) (.cse0 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse1))) (and (forall ((v_ArrVal_460 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_461 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_460) c_create_data_~data~0.base) .cse1) .cse2) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_461) c_create_data_~data~0.base) .cse1)))) (forall ((v_ArrVal_460 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_460) c_create_data_~data~0.base) .cse1))) (bvule (bvadd (_ bv4 32) .cse3 .cse2) (bvadd (_ bv8 32) .cse3 .cse2))))))) is different from false [2022-11-03 03:29:46,660 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse1 (bvmul c_create_data_~counter~0 (_ bv4 32))) (.cse2 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse3))) (and (forall ((v_ArrVal_460 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| .cse2 v_ArrVal_460) c_create_data_~data~0.base) .cse3))) (bvule (bvadd (_ bv8 32) .cse0 .cse1) (bvadd .cse0 .cse1 (_ bv12 32))))) (forall ((v_ArrVal_460 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_461 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse2 v_ArrVal_460) c_create_data_~data~0.base) .cse3) .cse1 (_ bv12 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_461) c_create_data_~data~0.base) .cse3))))))) is different from false [2022-11-03 03:29:46,768 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (bvmul c_create_data_~counter~0 (_ bv4 32))) (.cse2 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (and (forall ((v_ArrVal_460 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_458 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_459 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_create_data_#t~mem9.base| v_ArrVal_458) (select (select (store |c_#memory_$Pointer$.base| |c_create_data_#t~mem9.base| v_ArrVal_459) c_create_data_~data~0.base) .cse2) v_ArrVal_460) c_create_data_~data~0.base) .cse2))) (bvule (bvadd (_ bv8 32) .cse0 .cse1) (bvadd .cse0 .cse1 (_ bv12 32))))) (forall ((v_ArrVal_460 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_461 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_458 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_459 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_create_data_#t~mem9.base| v_ArrVal_459))) (let ((.cse3 (select (select .cse4 c_create_data_~data~0.base) .cse2))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| |c_create_data_#t~mem9.base| v_ArrVal_458) .cse3 v_ArrVal_460) c_create_data_~data~0.base) .cse2) .cse1 (_ bv12 32)) (select |c_#length| (select (select (store .cse4 .cse3 v_ArrVal_461) c_create_data_~data~0.base) .cse2)))))))) is different from false [2022-11-03 03:29:46,840 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse3 (bvmul c_create_data_~counter~0 (_ bv4 32))) (.cse0 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse2))) (and (forall ((v_ArrVal_460 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_461 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_458 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_459 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_459))) (let ((.cse1 (select (select .cse4 c_create_data_~data~0.base) .cse2))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_458) .cse1 v_ArrVal_460) c_create_data_~data~0.base) .cse2) .cse3 (_ bv12 32)) (select |c_#length| (select (select (store .cse4 .cse1 v_ArrVal_461) c_create_data_~data~0.base) .cse2)))))) (forall ((v_ArrVal_460 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_458 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_459 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse5 (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_458) (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_459) c_create_data_~data~0.base) .cse2) v_ArrVal_460) c_create_data_~data~0.base) .cse2))) (bvule (bvadd .cse5 (_ bv8 32) .cse3) (bvadd .cse5 .cse3 (_ bv12 32)))))))) is different from false [2022-11-03 03:29:46,957 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse2))) (and (forall ((v_ArrVal_460 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_461 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_458 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_459 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_459))) (let ((.cse1 (select (select .cse3 c_create_data_~data~0.base) .cse2))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_458) .cse1 v_ArrVal_460) c_create_data_~data~0.base) .cse2) (_ bv12 32)) (select |c_#length| (select (select (store .cse3 .cse1 v_ArrVal_461) c_create_data_~data~0.base) .cse2)))))) (forall ((v_ArrVal_460 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_458 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_459 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_458) (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_459) c_create_data_~data~0.base) .cse2) v_ArrVal_460) c_create_data_~data~0.base) .cse2))) (bvule (bvadd .cse4 (_ bv8 32)) (bvadd .cse4 (_ bv12 32)))))))) is different from false [2022-11-03 03:29:46,982 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:46,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 90 [2022-11-03 03:29:46,999 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:46,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 60 [2022-11-03 03:29:47,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 400 treesize of output 334 [2022-11-03 03:29:47,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 688 treesize of output 634 [2022-11-03 03:29:47,037 INFO L390 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 630 treesize of output 582 [2022-11-03 03:29:47,045 INFO L390 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 582 treesize of output 534 [2022-11-03 03:29:47,052 INFO L390 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 534 treesize of output 430 [2022-11-03 03:29:47,059 INFO L390 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 430 treesize of output 414 [2022-11-03 03:29:48,939 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:48,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 80 [2022-11-03 03:29:48,956 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:48,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 60 [2022-11-03 03:29:48,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 102 treesize of output 84 [2022-11-03 03:29:48,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 286 treesize of output 244 [2022-11-03 03:29:49,006 INFO L390 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 202 treesize of output 186 [2022-11-03 03:29:49,014 INFO L390 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 224 treesize of output 184 [2022-11-03 03:29:49,031 INFO L390 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 154 treesize of output 130 [2022-11-03 03:29:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 11 not checked. [2022-11-03 03:29:49,177 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:49,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877094013] [2022-11-03 03:29:49,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877094013] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:49,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1127426428] [2022-11-03 03:29:49,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:29:49,177 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:29:49,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:29:49,180 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:29:49,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-03 03:29:49,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:29:49,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:29:49,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 03:29:49,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:49,681 INFO L390 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 10 treesize of output 8 [2022-11-03 03:29:49,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-03 03:29:49,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:29:49,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:29:49,812 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:29:49,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-11-03 03:29:49,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-03 03:29:49,945 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:29:49,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-11-03 03:29:49,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-03 03:29:50,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 31 treesize of output 13 [2022-11-03 03:29:50,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 03:29:50,049 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:50,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:50,244 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (bvmul c_create_data_~counter~0 (_ bv4 32))) (.cse2 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (and (forall ((v_ArrVal_522 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_create_data_#t~mem9.base| v_ArrVal_522) c_create_data_~data~0.base) .cse2))) (bvule (bvadd (_ bv4 32) .cse0 .cse1) (bvadd (_ bv8 32) .cse0 .cse1)))) (forall ((v_ArrVal_522 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_523 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_create_data_#t~mem9.base| v_ArrVal_522) c_create_data_~data~0.base) .cse2) .cse1) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_create_data_#t~mem9.base| v_ArrVal_523) c_create_data_~data~0.base) .cse2)))))) is different from false [2022-11-03 03:29:50,299 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse2 (bvmul c_create_data_~counter~0 (_ bv4 32))) (.cse0 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse1))) (and (forall ((v_ArrVal_522 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_523 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_522) c_create_data_~data~0.base) .cse1) .cse2) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_523) c_create_data_~data~0.base) .cse1)))) (forall ((v_ArrVal_522 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_522) c_create_data_~data~0.base) .cse1))) (bvule (bvadd (_ bv4 32) .cse3 .cse2) (bvadd (_ bv8 32) .cse3 .cse2))))))) is different from false [2022-11-03 03:29:50,374 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse1 (bvmul c_create_data_~counter~0 (_ bv4 32))) (.cse2 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse3))) (and (forall ((v_ArrVal_522 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| .cse2 v_ArrVal_522) c_create_data_~data~0.base) .cse3))) (bvule (bvadd (_ bv8 32) .cse0 .cse1) (bvadd .cse0 .cse1 (_ bv12 32))))) (forall ((v_ArrVal_522 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_523 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse2 v_ArrVal_522) c_create_data_~data~0.base) .cse3) .cse1 (_ bv12 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_523) c_create_data_~data~0.base) .cse3))))))) is different from false [2022-11-03 03:29:50,797 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (bvmul c_create_data_~counter~0 (_ bv4 32))) (.cse2 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (and (forall ((v_ArrVal_520 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_521 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_522 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_create_data_#t~mem9.base| v_ArrVal_521) (select (select (store |c_#memory_$Pointer$.base| |c_create_data_#t~mem9.base| v_ArrVal_520) c_create_data_~data~0.base) .cse2) v_ArrVal_522) c_create_data_~data~0.base) .cse2))) (bvule (bvadd .cse0 (_ bv8 32) .cse1) (bvadd .cse0 .cse1 (_ bv12 32))))) (forall ((v_ArrVal_520 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_521 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_522 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_523 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_create_data_#t~mem9.base| v_ArrVal_520))) (let ((.cse3 (select (select .cse4 c_create_data_~data~0.base) .cse2))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| |c_create_data_#t~mem9.base| v_ArrVal_521) .cse3 v_ArrVal_522) c_create_data_~data~0.base) .cse2) .cse1 (_ bv12 32)) (select |c_#length| (select (select (store .cse4 .cse3 v_ArrVal_523) c_create_data_~data~0.base) .cse2)))))))) is different from false [2022-11-03 03:29:51,150 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse3 (bvmul c_create_data_~counter~0 (_ bv4 32))) (.cse0 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse2))) (and (forall ((v_ArrVal_520 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_521 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_522 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_523 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_520))) (let ((.cse1 (select (select .cse4 c_create_data_~data~0.base) .cse2))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_521) .cse1 v_ArrVal_522) c_create_data_~data~0.base) .cse2) .cse3 (_ bv12 32)) (select |c_#length| (select (select (store .cse4 .cse1 v_ArrVal_523) c_create_data_~data~0.base) .cse2)))))) (forall ((v_ArrVal_520 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_521 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_522 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse5 (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_521) (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_520) c_create_data_~data~0.base) .cse2) v_ArrVal_522) c_create_data_~data~0.base) .cse2))) (bvule (bvadd (_ bv8 32) .cse5 .cse3) (bvadd .cse5 .cse3 (_ bv12 32)))))))) is different from false [2022-11-03 03:29:51,244 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse2))) (and (forall ((v_ArrVal_520 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_521 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_522 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_521) (select (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_520) c_create_data_~data~0.base) .cse2) v_ArrVal_522) c_create_data_~data~0.base) .cse2))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd .cse0 (_ bv12 32))))) (forall ((v_ArrVal_520 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_521 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_522 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_523 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_520))) (let ((.cse3 (select (select .cse4 c_create_data_~data~0.base) .cse2))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_521) .cse3 v_ArrVal_522) c_create_data_~data~0.base) .cse2) (_ bv12 32)) (select |c_#length| (select (select (store .cse4 .cse3 v_ArrVal_523) c_create_data_~data~0.base) .cse2))))))))) is different from false [2022-11-03 03:29:51,270 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:51,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 90 [2022-11-03 03:29:51,288 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:51,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 60 [2022-11-03 03:29:51,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 400 treesize of output 334 [2022-11-03 03:29:51,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 688 treesize of output 634 [2022-11-03 03:29:51,317 INFO L390 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 630 treesize of output 582 [2022-11-03 03:29:51,324 INFO L390 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 582 treesize of output 478 [2022-11-03 03:29:51,331 INFO L390 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 478 treesize of output 430 [2022-11-03 03:29:51,338 INFO L390 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 430 treesize of output 414 [2022-11-03 03:29:53,740 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:53,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 80 [2022-11-03 03:29:53,768 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:53,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 60 [2022-11-03 03:29:53,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 102 treesize of output 84 [2022-11-03 03:29:53,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 286 treesize of output 244 [2022-11-03 03:29:53,822 INFO L390 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 202 treesize of output 186 [2022-11-03 03:29:53,845 INFO L390 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 186 treesize of output 162 [2022-11-03 03:29:53,854 INFO L390 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 200 treesize of output 160 [2022-11-03 03:29:54,222 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 11 not checked. [2022-11-03 03:29:54,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1127426428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:54,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245795297] [2022-11-03 03:29:54,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:29:54,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:54,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:54,225 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:54,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 03:29:54,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:29:54,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:29:54,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 03:29:54,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:54,421 INFO L390 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 10 treesize of output 8 [2022-11-03 03:29:54,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-03 03:29:54,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:29:54,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:29:54,543 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:29:54,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-11-03 03:29:54,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-03 03:29:54,694 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:29:54,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-11-03 03:29:54,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-03 03:29:54,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 31 treesize of output 13 [2022-11-03 03:29:54,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 03:29:54,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:54,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:55,048 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (bvmul c_create_data_~counter~0 (_ bv4 32))) (.cse2 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (and (forall ((v_ArrVal_585 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_create_data_#t~mem9.base| v_ArrVal_585) c_create_data_~data~0.base) .cse2))) (bvule (bvadd (_ bv4 32) .cse0 .cse1) (bvadd (_ bv8 32) .cse0 .cse1)))) (forall ((v_ArrVal_585 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_584 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_create_data_#t~mem9.base| v_ArrVal_585) c_create_data_~data~0.base) .cse2) .cse1) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_create_data_#t~mem9.base| v_ArrVal_584) c_create_data_~data~0.base) .cse2)))))) is different from false [2022-11-03 03:29:55,111 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse2 (bvmul c_create_data_~counter~0 (_ bv4 32))) (.cse0 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse1))) (and (forall ((v_ArrVal_585 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_584 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_585) c_create_data_~data~0.base) .cse1) .cse2) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_584) c_create_data_~data~0.base) .cse1)))) (forall ((v_ArrVal_585 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_585) c_create_data_~data~0.base) .cse1))) (bvule (bvadd (_ bv4 32) .cse3 .cse2) (bvadd (_ bv8 32) .cse3 .cse2))))))) is different from false [2022-11-03 03:29:55,202 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse1 (bvmul c_create_data_~counter~0 (_ bv4 32))) (.cse2 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse3))) (and (forall ((v_ArrVal_585 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| .cse2 v_ArrVal_585) c_create_data_~data~0.base) .cse3))) (bvule (bvadd (_ bv8 32) .cse0 .cse1) (bvadd .cse0 .cse1 (_ bv12 32))))) (forall ((v_ArrVal_585 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_584 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse2 v_ArrVal_585) c_create_data_~data~0.base) .cse3) .cse1 (_ bv12 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_584) c_create_data_~data~0.base) .cse3))))))) is different from false [2022-11-03 03:29:55,571 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (bvmul c_create_data_~counter~0 (_ bv4 32))) (.cse1 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (and (forall ((v_ArrVal_585 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_582 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_583 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_584 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_create_data_#t~mem9.base| v_ArrVal_583))) (let ((.cse0 (select (select .cse3 c_create_data_~data~0.base) .cse1))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| |c_create_data_#t~mem9.base| v_ArrVal_582) .cse0 v_ArrVal_585) c_create_data_~data~0.base) .cse1) .cse2 (_ bv12 32)) (select |c_#length| (select (select (store .cse3 .cse0 v_ArrVal_584) c_create_data_~data~0.base) .cse1)))))) (forall ((v_ArrVal_585 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_582 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_583 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (select (select (store (store |c_#memory_$Pointer$.offset| |c_create_data_#t~mem9.base| v_ArrVal_582) (select (select (store |c_#memory_$Pointer$.base| |c_create_data_#t~mem9.base| v_ArrVal_583) c_create_data_~data~0.base) .cse1) v_ArrVal_585) c_create_data_~data~0.base) .cse1))) (bvule (bvadd (_ bv8 32) .cse4 .cse2) (bvadd .cse4 .cse2 (_ bv12 32))))))) is different from false [2022-11-03 03:29:55,909 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse1 (bvmul c_create_data_~counter~0 (_ bv4 32))) (.cse2 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse3))) (and (forall ((v_ArrVal_585 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_582 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_583 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.offset| .cse2 v_ArrVal_582) (select (select (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_583) c_create_data_~data~0.base) .cse3) v_ArrVal_585) c_create_data_~data~0.base) .cse3))) (bvule (bvadd (_ bv8 32) .cse0 .cse1) (bvadd .cse0 .cse1 (_ bv12 32))))) (forall ((v_ArrVal_585 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_582 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_583 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_584 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse5 (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_583))) (let ((.cse4 (select (select .cse5 c_create_data_~data~0.base) .cse3))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| .cse2 v_ArrVal_582) .cse4 v_ArrVal_585) c_create_data_~data~0.base) .cse3) .cse1 (_ bv12 32)) (select |c_#length| (select (select (store .cse5 .cse4 v_ArrVal_584) c_create_data_~data~0.base) .cse3))))))))) is different from false [2022-11-03 03:29:55,986 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse2))) (and (forall ((v_ArrVal_585 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_582 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_583 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_584 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_583))) (let ((.cse1 (select (select .cse3 c_create_data_~data~0.base) .cse2))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_582) .cse1 v_ArrVal_585) c_create_data_~data~0.base) .cse2) (_ bv12 32)) (select |c_#length| (select (select (store .cse3 .cse1 v_ArrVal_584) c_create_data_~data~0.base) .cse2)))))) (forall ((v_ArrVal_585 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_582 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_583 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_582) (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_583) c_create_data_~data~0.base) .cse2) v_ArrVal_585) c_create_data_~data~0.base) .cse2))) (bvule (bvadd (_ bv8 32) .cse4) (bvadd .cse4 (_ bv12 32)))))))) is different from false [2022-11-03 03:29:56,012 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:56,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 80 [2022-11-03 03:29:56,025 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:56,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 60 [2022-11-03 03:29:56,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 102 treesize of output 84 [2022-11-03 03:29:56,044 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 286 treesize of output 244 [2022-11-03 03:29:56,058 INFO L390 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 202 treesize of output 186 [2022-11-03 03:29:56,062 INFO L390 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 224 treesize of output 184 [2022-11-03 03:29:56,077 INFO L390 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 154 treesize of output 130 [2022-11-03 03:29:56,126 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:56,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 90 [2022-11-03 03:29:56,147 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:56,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 60 [2022-11-03 03:29:56,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:56,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 56 [2022-11-03 03:29:56,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:56,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 32 [2022-11-03 03:29:56,179 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 11 not checked. [2022-11-03 03:29:56,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245795297] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:56,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:29:56,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9, 11, 9, 11] total 31 [2022-11-03 03:29:56,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505187442] [2022-11-03 03:29:56,180 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:56,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-03 03:29:56,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:56,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-03 03:29:56,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=156, Unknown=18, NotChecked=738, Total=992 [2022-11-03 03:29:56,181 INFO L87 Difference]: Start difference. First operand 234 states and 273 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 32 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:03,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:03,123 INFO L93 Difference]: Finished difference Result 246 states and 285 transitions. [2022-11-03 03:30:03,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:30:03,124 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 32 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-03 03:30:03,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:03,125 INFO L225 Difference]: With dead ends: 246 [2022-11-03 03:30:03,126 INFO L226 Difference]: Without dead ends: 246 [2022-11-03 03:30:03,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 126 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 18 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=109, Invalid=251, Unknown=18, NotChecked=882, Total=1260 [2022-11-03 03:30:03,127 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 23 mSDsluCounter, 2155 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2318 SdHoareTripleChecker+Invalid, 2387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1656 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:03,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 2318 Invalid, 2387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 718 Invalid, 0 Unknown, 1656 Unchecked, 4.1s Time] [2022-11-03 03:30:03,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-11-03 03:30:03,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 244. [2022-11-03 03:30:03,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 180 states have (on average 1.55) internal successors, (279), 239 states have internal predecessors, (279), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:30:03,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 283 transitions. [2022-11-03 03:30:03,134 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 283 transitions. Word has length 27 [2022-11-03 03:30:03,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:03,135 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 283 transitions. [2022-11-03 03:30:03,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 32 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:03,135 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 283 transitions. [2022-11-03 03:30:03,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-03 03:30:03,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:03,136 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:03,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:03,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:03,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:03,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:03,744 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting create_dataErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:30:03,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:03,744 INFO L85 PathProgramCache]: Analyzing trace with hash 852563911, now seen corresponding path program 3 times [2022-11-03 03:30:03,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:30:03,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [384181330] [2022-11-03 03:30:03,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:30:03,745 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:30:03,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:30:03,746 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:30:03,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 03:30:04,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 03:30:04,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:30:04,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:30:04,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:04,209 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:04,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:04,361 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:04,361 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:30:04,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [384181330] [2022-11-03 03:30:04,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [384181330] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:30:04,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1880781927] [2022-11-03 03:30:04,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:30:04,362 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:30:04,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:30:04,367 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:30:04,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-03 03:30:04,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 03:30:04,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:30:04,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:30:04,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:04,988 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:04,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:05,055 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:05,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1880781927] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:30:05,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771192039] [2022-11-03 03:30:05,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:30:05,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:05,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:30:05,059 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:30:05,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-03 03:30:05,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 03:30:05,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:30:05,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:30:05,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:05,551 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:05,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:05,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771192039] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:30:05,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:30:05,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2022-11-03 03:30:05,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024112329] [2022-11-03 03:30:05,608 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:30:05,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:30:05,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:30:05,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:30:05,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:30:05,609 INFO L87 Difference]: Start difference. First operand 244 states and 283 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:05,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:05,776 INFO L93 Difference]: Finished difference Result 241 states and 277 transitions. [2022-11-03 03:30:05,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:30:05,779 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-03 03:30:05,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:05,780 INFO L225 Difference]: With dead ends: 241 [2022-11-03 03:30:05,780 INFO L226 Difference]: Without dead ends: 241 [2022-11-03 03:30:05,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:30:05,781 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 235 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:05,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 895 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:30:05,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-03 03:30:05,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 239. [2022-11-03 03:30:05,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 176 states have (on average 1.5397727272727273) internal successors, (271), 234 states have internal predecessors, (271), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:30:05,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 275 transitions. [2022-11-03 03:30:05,789 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 275 transitions. Word has length 32 [2022-11-03 03:30:05,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:05,790 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 275 transitions. [2022-11-03 03:30:05,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:05,790 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 275 transitions. [2022-11-03 03:30:05,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 03:30:05,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:05,791 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:05,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:06,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:06,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:06,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:30:06,419 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting create_dataErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:30:06,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:06,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1939829061, now seen corresponding path program 1 times [2022-11-03 03:30:06,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:30:06,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [599707360] [2022-11-03 03:30:06,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:06,421 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:30:06,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:30:06,422 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:30:06,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 03:30:06,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:06,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:30:06,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:06,677 INFO L390 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 7 [2022-11-03 03:30:06,685 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:30:06,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:06,685 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:30:06,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [599707360] [2022-11-03 03:30:06,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [599707360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:06,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:06,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:30:06,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617652314] [2022-11-03 03:30:06,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:06,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:30:06,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:30:06,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:30:06,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:30:06,688 INFO L87 Difference]: Start difference. First operand 239 states and 275 transitions. Second operand has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:07,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:07,043 INFO L93 Difference]: Finished difference Result 241 states and 269 transitions. [2022-11-03 03:30:07,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:30:07,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-03 03:30:07,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:07,045 INFO L225 Difference]: With dead ends: 241 [2022-11-03 03:30:07,045 INFO L226 Difference]: Without dead ends: 241 [2022-11-03 03:30:07,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:30:07,046 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 22 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:07,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 233 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:30:07,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-03 03:30:07,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 235. [2022-11-03 03:30:07,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 176 states have (on average 1.4715909090909092) internal successors, (259), 230 states have internal predecessors, (259), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:30:07,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 263 transitions. [2022-11-03 03:30:07,053 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 263 transitions. Word has length 41 [2022-11-03 03:30:07,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:07,053 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 263 transitions. [2022-11-03 03:30:07,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:07,053 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 263 transitions. [2022-11-03 03:30:07,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 03:30:07,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:07,054 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:07,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:07,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:30:07,269 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting create_dataErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:30:07,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:07,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1939829060, now seen corresponding path program 1 times [2022-11-03 03:30:07,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:30:07,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1187621030] [2022-11-03 03:30:07,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:07,270 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:30:07,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:30:07,271 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:30:07,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 03:30:07,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:07,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:30:07,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:07,544 INFO L390 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 [2022-11-03 03:30:07,559 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:30:07,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:07,559 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:30:07,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1187621030] [2022-11-03 03:30:07,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1187621030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:07,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:07,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:30:07,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886449566] [2022-11-03 03:30:07,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:07,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:30:07,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:30:07,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:30:07,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:30:07,563 INFO L87 Difference]: Start difference. First operand 235 states and 263 transitions. Second operand has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:08,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:08,018 INFO L93 Difference]: Finished difference Result 237 states and 257 transitions. [2022-11-03 03:30:08,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:30:08,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-03 03:30:08,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:08,020 INFO L225 Difference]: With dead ends: 237 [2022-11-03 03:30:08,020 INFO L226 Difference]: Without dead ends: 237 [2022-11-03 03:30:08,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:30:08,023 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 18 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:08,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 232 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:30:08,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-03 03:30:08,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 231. [2022-11-03 03:30:08,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 176 states have (on average 1.4034090909090908) internal successors, (247), 226 states have internal predecessors, (247), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:30:08,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 251 transitions. [2022-11-03 03:30:08,031 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 251 transitions. Word has length 41 [2022-11-03 03:30:08,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:08,033 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 251 transitions. [2022-11-03 03:30:08,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:08,033 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 251 transitions. [2022-11-03 03:30:08,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 03:30:08,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:08,040 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:08,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:08,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:30:08,254 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:30:08,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:08,255 INFO L85 PathProgramCache]: Analyzing trace with hash -663465002, now seen corresponding path program 1 times [2022-11-03 03:30:08,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:30:08,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [837364809] [2022-11-03 03:30:08,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:08,255 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:30:08,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:30:08,256 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:30:08,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 03:30:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:08,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:30:08,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:08,553 INFO L390 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 7 [2022-11-03 03:30:08,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:30:08,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 9 [2022-11-03 03:30:08,989 INFO L356 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2022-11-03 03:30:08,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 38 [2022-11-03 03:30:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:30:09,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:10,158 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:30:10,158 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:30:10,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [837364809] [2022-11-03 03:30:10,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [837364809] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:30:10,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:30:10,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 03:30:10,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667222814] [2022-11-03 03:30:10,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:10,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:30:10,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:30:10,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:30:10,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:30:10,160 INFO L87 Difference]: Start difference. First operand 231 states and 251 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:30:10,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:10,458 INFO L93 Difference]: Finished difference Result 272 states and 297 transitions. [2022-11-03 03:30:10,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:30:10,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-11-03 03:30:10,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:10,461 INFO L225 Difference]: With dead ends: 272 [2022-11-03 03:30:10,461 INFO L226 Difference]: Without dead ends: 272 [2022-11-03 03:30:10,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:30:10,461 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 63 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:10,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 256 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 74 Unchecked, 0.3s Time] [2022-11-03 03:30:10,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-03 03:30:10,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 243. [2022-11-03 03:30:10,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 187 states have (on average 1.4064171122994653) internal successors, (263), 237 states have internal predecessors, (263), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 03:30:10,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 268 transitions. [2022-11-03 03:30:10,469 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 268 transitions. Word has length 44 [2022-11-03 03:30:10,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:10,469 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 268 transitions. [2022-11-03 03:30:10,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:30:10,470 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 268 transitions. [2022-11-03 03:30:10,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 03:30:10,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:10,470 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:10,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:10,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:30:10,686 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:30:10,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:10,687 INFO L85 PathProgramCache]: Analyzing trace with hash -663465001, now seen corresponding path program 1 times [2022-11-03 03:30:10,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:30:10,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686427419] [2022-11-03 03:30:10,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:10,687 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:30:10,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:30:10,688 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:30:10,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 03:30:11,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:11,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:30:11,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:11,049 INFO L390 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 [2022-11-03 03:30:11,055 INFO L390 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 7 [2022-11-03 03:30:11,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:30:11,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 9 [2022-11-03 03:30:11,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:11,671 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 03:30:11,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 27 [2022-11-03 03:30:11,692 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 03:30:11,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 03:30:11,762 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:30:11,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:16,108 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:30:16,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686427419] [2022-11-03 03:30:16,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686427419] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:30:16,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1506136876] [2022-11-03 03:30:16,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:16,109 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:30:16,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:30:16,111 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:30:16,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-03 03:30:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:16,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 03:30:16,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:16,899 INFO L390 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 [2022-11-03 03:30:16,908 INFO L390 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 7 [2022-11-03 03:30:17,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:17,399 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 03:30:17,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 27 [2022-11-03 03:30:17,420 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 03:30:17,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 03:30:17,437 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:30:17,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:17,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1506136876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:17,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:30:17,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 8 [2022-11-03 03:30:17,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029681711] [2022-11-03 03:30:17,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:17,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:30:17,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:30:17,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:30:17,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=85, Unknown=1, NotChecked=0, Total=110 [2022-11-03 03:30:17,446 INFO L87 Difference]: Start difference. First operand 243 states and 268 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:30:18,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:18,466 INFO L93 Difference]: Finished difference Result 314 states and 347 transitions. [2022-11-03 03:30:18,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:30:18,467 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-11-03 03:30:18,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:18,469 INFO L225 Difference]: With dead ends: 314 [2022-11-03 03:30:18,469 INFO L226 Difference]: Without dead ends: 314 [2022-11-03 03:30:18,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=30, Invalid=101, Unknown=1, NotChecked=0, Total=132 [2022-11-03 03:30:18,470 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 78 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:18,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 578 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 319 Invalid, 0 Unknown, 198 Unchecked, 1.0s Time] [2022-11-03 03:30:18,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-11-03 03:30:18,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 246. [2022-11-03 03:30:18,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 189 states have (on average 1.3968253968253967) internal successors, (264), 239 states have internal predecessors, (264), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 03:30:18,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 270 transitions. [2022-11-03 03:30:18,477 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 270 transitions. Word has length 44 [2022-11-03 03:30:18,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:18,478 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 270 transitions. [2022-11-03 03:30:18,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:30:18,478 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 270 transitions. [2022-11-03 03:30:18,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 03:30:18,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:18,479 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:18,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:18,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:18,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:30:18,895 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:30:18,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:18,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1359492877, now seen corresponding path program 1 times [2022-11-03 03:30:18,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:30:18,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [206038919] [2022-11-03 03:30:18,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:18,896 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:30:18,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:30:18,898 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:30:18,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 03:30:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:19,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:30:19,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:19,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:30:19,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:30:19,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:30:19,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 30 treesize of output 39 [2022-11-03 03:30:19,478 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:30:19,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 26 [2022-11-03 03:30:19,531 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:30:19,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:19,532 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:30:19,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [206038919] [2022-11-03 03:30:19,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [206038919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:19,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:19,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:30:19,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193792455] [2022-11-03 03:30:19,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:19,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:30:19,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:30:19,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:30:19,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:30:19,533 INFO L87 Difference]: Start difference. First operand 246 states and 270 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:30:20,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:20,186 INFO L93 Difference]: Finished difference Result 288 states and 320 transitions. [2022-11-03 03:30:20,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:30:20,188 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-11-03 03:30:20,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:20,189 INFO L225 Difference]: With dead ends: 288 [2022-11-03 03:30:20,189 INFO L226 Difference]: Without dead ends: 288 [2022-11-03 03:30:20,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:30:20,190 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 26 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:20,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 706 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:30:20,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-11-03 03:30:20,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 256. [2022-11-03 03:30:20,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 199 states have (on average 1.3819095477386936) internal successors, (275), 249 states have internal predecessors, (275), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 03:30:20,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 281 transitions. [2022-11-03 03:30:20,202 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 281 transitions. Word has length 46 [2022-11-03 03:30:20,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:20,202 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 281 transitions. [2022-11-03 03:30:20,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:30:20,203 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 281 transitions. [2022-11-03 03:30:20,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 03:30:20,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:20,204 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:20,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:20,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:30:20,420 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:30:20,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:20,421 INFO L85 PathProgramCache]: Analyzing trace with hash 918765395, now seen corresponding path program 1 times [2022-11-03 03:30:20,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:30:20,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11857968] [2022-11-03 03:30:20,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:20,421 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:30:20,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:30:20,423 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:30:20,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 03:30:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:20,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:30:20,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:30:20,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:20,730 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:30:20,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11857968] [2022-11-03 03:30:20,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11857968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:20,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:20,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:30:20,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282724027] [2022-11-03 03:30:20,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:20,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:30:20,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:30:20,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:30:20,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:30:20,732 INFO L87 Difference]: Start difference. First operand 256 states and 281 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:30:20,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:20,770 INFO L93 Difference]: Finished difference Result 264 states and 287 transitions. [2022-11-03 03:30:20,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:30:20,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-11-03 03:30:20,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:20,772 INFO L225 Difference]: With dead ends: 264 [2022-11-03 03:30:20,772 INFO L226 Difference]: Without dead ends: 264 [2022-11-03 03:30:20,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:30:20,773 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 3 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:20,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 455 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:30:20,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-11-03 03:30:20,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 262. [2022-11-03 03:30:20,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 205 states have (on average 1.3609756097560977) internal successors, (279), 255 states have internal predecessors, (279), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 03:30:20,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 285 transitions. [2022-11-03 03:30:20,781 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 285 transitions. Word has length 46 [2022-11-03 03:30:20,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:20,781 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 285 transitions. [2022-11-03 03:30:20,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:30:20,782 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 285 transitions. [2022-11-03 03:30:20,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 03:30:20,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:20,783 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:20,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:20,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:30:20,997 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:30:20,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:20,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1934703003, now seen corresponding path program 1 times [2022-11-03 03:30:20,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:30:20,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1166608538] [2022-11-03 03:30:20,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:20,998 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:30:20,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:30:20,999 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:30:21,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 03:30:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:21,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 03:30:21,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:21,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:30:21,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 9 [2022-11-03 03:30:21,794 INFO L356 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2022-11-03 03:30:21,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 34 [2022-11-03 03:30:21,871 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:30:21,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:26,043 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:30:26,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1166608538] [2022-11-03 03:30:26,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1166608538] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:30:26,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [64706480] [2022-11-03 03:30:26,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:26,043 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:30:26,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:30:26,045 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:30:26,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-03 03:30:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:26,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:30:26,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:27,007 INFO L390 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 7 treesize of output 5 [2022-11-03 03:30:27,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:27,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:27,810 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:30:27,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 31 [2022-11-03 03:30:27,922 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:30:27,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:27,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [64706480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:27,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:30:27,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2022-11-03 03:30:27,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818194733] [2022-11-03 03:30:27,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:27,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:30:27,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:30:27,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:30:27,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=170, Unknown=2, NotChecked=0, Total=210 [2022-11-03 03:30:27,924 INFO L87 Difference]: Start difference. First operand 262 states and 285 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:30:28,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:28,436 INFO L93 Difference]: Finished difference Result 301 states and 328 transitions. [2022-11-03 03:30:28,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:30:28,439 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-11-03 03:30:28,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:28,441 INFO L225 Difference]: With dead ends: 301 [2022-11-03 03:30:28,441 INFO L226 Difference]: Without dead ends: 301 [2022-11-03 03:30:28,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=50, Invalid=220, Unknown=2, NotChecked=0, Total=272 [2022-11-03 03:30:28,442 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 12 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:28,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 627 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 148 Unchecked, 0.4s Time] [2022-11-03 03:30:28,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-11-03 03:30:28,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 300. [2022-11-03 03:30:28,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 241 states have (on average 1.3195020746887967) internal successors, (318), 291 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-03 03:30:28,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 327 transitions. [2022-11-03 03:30:28,451 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 327 transitions. Word has length 46 [2022-11-03 03:30:28,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:28,452 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 327 transitions. [2022-11-03 03:30:28,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:30:28,452 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 327 transitions. [2022-11-03 03:30:28,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 03:30:28,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:28,453 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:28,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:28,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:28,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:30:28,875 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:30:28,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:28,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1934703002, now seen corresponding path program 1 times [2022-11-03 03:30:28,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:30:28,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1712176671] [2022-11-03 03:30:28,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:28,876 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:30:28,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:30:28,877 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:30:28,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 03:30:29,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:29,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:30:29,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:29,316 INFO L390 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 [2022-11-03 03:30:29,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:30:29,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 9 [2022-11-03 03:30:29,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:29,973 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 03:30:29,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 29 [2022-11-03 03:30:29,998 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 03:30:29,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 03:30:30,154 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:30:30,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:32,539 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:30:32,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1712176671] [2022-11-03 03:30:32,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1712176671] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:30:32,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1512269856] [2022-11-03 03:30:32,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:32,540 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:30:32,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:30:32,541 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:30:32,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-03 03:30:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:33,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:30:33,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:33,321 INFO L390 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 [2022-11-03 03:30:33,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:33,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 03:30:33,682 INFO L390 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 13 treesize of output 9 [2022-11-03 03:30:34,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:34,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:34,702 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:30:34,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 28 [2022-11-03 03:30:34,931 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:30:34,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:34,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1512269856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:34,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:30:34,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2022-11-03 03:30:34,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497821945] [2022-11-03 03:30:34,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:34,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:30:34,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:30:34,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:30:34,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:30:34,934 INFO L87 Difference]: Start difference. First operand 300 states and 327 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:30:35,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:35,799 INFO L93 Difference]: Finished difference Result 301 states and 327 transitions. [2022-11-03 03:30:35,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:30:35,801 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-11-03 03:30:35,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:35,802 INFO L225 Difference]: With dead ends: 301 [2022-11-03 03:30:35,802 INFO L226 Difference]: Without dead ends: 301 [2022-11-03 03:30:35,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:30:35,803 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 11 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:35,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 472 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 146 Invalid, 0 Unknown, 145 Unchecked, 0.7s Time] [2022-11-03 03:30:35,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-11-03 03:30:35,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 300. [2022-11-03 03:30:35,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 241 states have (on average 1.3153526970954357) internal successors, (317), 291 states have internal predecessors, (317), 3 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-03 03:30:35,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 326 transitions. [2022-11-03 03:30:35,812 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 326 transitions. Word has length 46 [2022-11-03 03:30:35,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:35,813 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 326 transitions. [2022-11-03 03:30:35,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:30:35,813 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 326 transitions. [2022-11-03 03:30:35,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 03:30:35,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:35,814 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:35,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:36,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:36,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:30:36,227 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:30:36,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:36,228 INFO L85 PathProgramCache]: Analyzing trace with hash 2050875696, now seen corresponding path program 1 times [2022-11-03 03:30:36,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:30:36,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598308700] [2022-11-03 03:30:36,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:36,228 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:30:36,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:30:36,229 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:30:36,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 03:30:36,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:36,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:30:36,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:36,609 INFO L390 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 7 [2022-11-03 03:30:36,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:30:36,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 9 [2022-11-03 03:30:37,093 INFO L356 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2022-11-03 03:30:37,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 34 [2022-11-03 03:30:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:30:37,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:41,314 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:30:41,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598308700] [2022-11-03 03:30:41,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598308700] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:30:41,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [853298842] [2022-11-03 03:30:41,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:41,315 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:30:41,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:30:41,316 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:30:41,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-03 03:30:42,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:42,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:30:42,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:42,023 INFO L390 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 7 [2022-11-03 03:30:44,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:30:44,519 INFO L356 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2022-11-03 03:30:44,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 31 [2022-11-03 03:30:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:30:44,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:44,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [853298842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:44,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:30:44,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 10 [2022-11-03 03:30:44,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254319339] [2022-11-03 03:30:44,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:44,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:30:44,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:30:44,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:30:44,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=96, Unknown=3, NotChecked=0, Total=132 [2022-11-03 03:30:44,538 INFO L87 Difference]: Start difference. First operand 300 states and 326 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:30:44,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:44,952 INFO L93 Difference]: Finished difference Result 350 states and 382 transitions. [2022-11-03 03:30:44,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:30:44,953 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-11-03 03:30:44,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:44,955 INFO L225 Difference]: With dead ends: 350 [2022-11-03 03:30:44,955 INFO L226 Difference]: Without dead ends: 350 [2022-11-03 03:30:44,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=33, Invalid=96, Unknown=3, NotChecked=0, Total=132 [2022-11-03 03:30:44,956 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 88 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 263 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:44,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 473 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 143 Invalid, 0 Unknown, 263 Unchecked, 0.4s Time] [2022-11-03 03:30:44,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-11-03 03:30:44,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 310. [2022-11-03 03:30:44,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 250 states have (on average 1.316) internal successors, (329), 300 states have internal predecessors, (329), 3 states have call successors, (3), 3 states have call predecessors, (3), 6 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 03:30:44,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 340 transitions. [2022-11-03 03:30:44,965 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 340 transitions. Word has length 48 [2022-11-03 03:30:44,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:44,966 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 340 transitions. [2022-11-03 03:30:44,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:30:44,966 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 340 transitions. [2022-11-03 03:30:44,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 03:30:44,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:44,967 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:44,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-11-03 03:30:45,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:45,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:30:45,382 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:30:45,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:45,383 INFO L85 PathProgramCache]: Analyzing trace with hash 2050875697, now seen corresponding path program 1 times [2022-11-03 03:30:45,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:30:45,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [643681135] [2022-11-03 03:30:45,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:45,384 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:30:45,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:30:45,385 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:30:45,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 03:30:45,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:45,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:30:45,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:45,773 INFO L390 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 [2022-11-03 03:30:45,781 INFO L390 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 7 [2022-11-03 03:30:45,906 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:30:45,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 9 [2022-11-03 03:30:46,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:46,337 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 03:30:46,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 27 [2022-11-03 03:30:46,366 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 03:30:46,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 03:30:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:30:46,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:48,767 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:30:48,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [643681135] [2022-11-03 03:30:48,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [643681135] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:30:48,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [267279247] [2022-11-03 03:30:48,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:48,768 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:30:48,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:30:48,769 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:30:48,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-03 03:30:49,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:49,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:30:49,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:49,534 INFO L390 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 [2022-11-03 03:30:49,541 INFO L390 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 7 [2022-11-03 03:30:51,628 WARN L855 $PredicateComparison]: unable to prove that (exists ((create_data_~data~0.base (_ BitVec 32))) (and (= (select |c_old(#valid)| create_data_~data~0.base) (_ bv0 1)) (exists ((v_ArrVal_2434 (_ BitVec 32))) (= |c_#length| (store (store |c_old(#length)| create_data_~data~0.base v_ArrVal_2434) |c_create_data_#t~malloc7.base| (_ bv80 32)))))) is different from true [2022-11-03 03:30:51,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:52,046 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 03:30:52,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 27 [2022-11-03 03:30:52,067 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 03:30:52,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 03:30:52,087 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:30:52,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:52,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [267279247] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:52,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:30:52,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2022-11-03 03:30:52,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61935312] [2022-11-03 03:30:52,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:52,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:30:52,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:30:52,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:30:52,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=87, Unknown=1, NotChecked=18, Total=132 [2022-11-03 03:30:52,089 INFO L87 Difference]: Start difference. First operand 310 states and 340 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:30:52,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:52,963 INFO L93 Difference]: Finished difference Result 374 states and 408 transitions. [2022-11-03 03:30:52,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:30:52,964 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-11-03 03:30:52,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:52,965 INFO L225 Difference]: With dead ends: 374 [2022-11-03 03:30:52,965 INFO L226 Difference]: Without dead ends: 374 [2022-11-03 03:30:52,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=32, Invalid=103, Unknown=1, NotChecked=20, Total=156 [2022-11-03 03:30:52,966 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 78 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 430 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:52,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 578 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 318 Invalid, 0 Unknown, 430 Unchecked, 0.8s Time] [2022-11-03 03:30:52,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-11-03 03:30:52,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 309. [2022-11-03 03:30:52,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 249 states have (on average 1.3132530120481927) internal successors, (327), 300 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 6 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 03:30:52,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 338 transitions. [2022-11-03 03:30:52,981 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 338 transitions. Word has length 48 [2022-11-03 03:30:52,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:52,982 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 338 transitions. [2022-11-03 03:30:52,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:30:52,982 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 338 transitions. [2022-11-03 03:30:52,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 03:30:52,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:52,983 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:52,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:53,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:53,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:30:53,389 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:30:53,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:53,390 INFO L85 PathProgramCache]: Analyzing trace with hash 471257990, now seen corresponding path program 1 times [2022-11-03 03:30:53,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:30:53,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1881191062] [2022-11-03 03:30:53,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:53,390 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:30:53,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:30:53,391 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:30:53,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 03:30:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:53,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:30:53,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:53,747 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:30:53,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:53,747 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:30:53,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1881191062] [2022-11-03 03:30:53,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1881191062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:53,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:53,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:30:53,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407569878] [2022-11-03 03:30:53,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:53,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:30:53,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:30:53,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:30:53,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:30:53,749 INFO L87 Difference]: Start difference. First operand 309 states and 338 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:30:54,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:54,119 INFO L93 Difference]: Finished difference Result 308 states and 337 transitions. [2022-11-03 03:30:54,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:30:54,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-11-03 03:30:54,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:54,121 INFO L225 Difference]: With dead ends: 308 [2022-11-03 03:30:54,121 INFO L226 Difference]: Without dead ends: 308 [2022-11-03 03:30:54,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:30:54,122 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 140 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:54,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 217 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:30:54,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-11-03 03:30:54,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2022-11-03 03:30:54,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 249 states have (on average 1.3092369477911647) internal successors, (326), 299 states have internal predecessors, (326), 3 states have call successors, (3), 3 states have call predecessors, (3), 6 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 03:30:54,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 337 transitions. [2022-11-03 03:30:54,129 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 337 transitions. Word has length 48 [2022-11-03 03:30:54,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:54,130 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 337 transitions. [2022-11-03 03:30:54,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:30:54,130 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 337 transitions. [2022-11-03 03:30:54,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 03:30:54,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:54,131 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:54,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:54,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:30:54,343 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:30:54,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:54,343 INFO L85 PathProgramCache]: Analyzing trace with hash 471257991, now seen corresponding path program 1 times [2022-11-03 03:30:54,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:30:54,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059470937] [2022-11-03 03:30:54,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:54,344 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:30:54,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:30:54,345 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:30:54,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 03:30:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:54,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:30:54,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:54,763 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:30:54,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:54,764 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:30:54,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059470937] [2022-11-03 03:30:54,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059470937] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:54,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:54,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:30:54,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815054893] [2022-11-03 03:30:54,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:54,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:30:54,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:30:54,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:30:54,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:30:54,766 INFO L87 Difference]: Start difference. First operand 308 states and 337 transitions. Second operand has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:30:55,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:55,213 INFO L93 Difference]: Finished difference Result 299 states and 328 transitions. [2022-11-03 03:30:55,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:30:55,218 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-11-03 03:30:55,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:55,220 INFO L225 Difference]: With dead ends: 299 [2022-11-03 03:30:55,220 INFO L226 Difference]: Without dead ends: 299 [2022-11-03 03:30:55,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:30:55,221 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 141 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:55,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 277 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:30:55,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-11-03 03:30:55,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-11-03 03:30:55,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 249 states have (on average 1.2730923694779117) internal successors, (317), 290 states have internal predecessors, (317), 3 states have call successors, (3), 3 states have call predecessors, (3), 6 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 03:30:55,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 328 transitions. [2022-11-03 03:30:55,229 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 328 transitions. Word has length 48 [2022-11-03 03:30:55,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:55,229 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 328 transitions. [2022-11-03 03:30:55,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:30:55,229 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 328 transitions. [2022-11-03 03:30:55,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 03:30:55,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:55,230 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:55,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:55,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:30:55,447 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:30:55,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:55,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1724095953, now seen corresponding path program 1 times [2022-11-03 03:30:55,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:30:55,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [622361421] [2022-11-03 03:30:55,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:55,449 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:30:55,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:30:55,450 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:30:55,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 03:30:55,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:55,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:30:55,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:55,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:30:55,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 11 [2022-11-03 03:30:55,885 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:30:55,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:55,886 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:30:55,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [622361421] [2022-11-03 03:30:55,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [622361421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:55,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:55,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:30:55,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262356102] [2022-11-03 03:30:55,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:55,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:30:55,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:30:55,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:30:55,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:30:55,887 INFO L87 Difference]: Start difference. First operand 299 states and 328 transitions. Second operand has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:30:56,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:56,668 INFO L93 Difference]: Finished difference Result 320 states and 350 transitions. [2022-11-03 03:30:56,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:30:56,669 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-11-03 03:30:56,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:56,669 INFO L225 Difference]: With dead ends: 320 [2022-11-03 03:30:56,669 INFO L226 Difference]: Without dead ends: 320 [2022-11-03 03:30:56,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:30:56,670 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 150 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:56,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 359 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:30:56,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-11-03 03:30:56,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 298. [2022-11-03 03:30:56,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 249 states have (on average 1.2690763052208835) internal successors, (316), 289 states have internal predecessors, (316), 3 states have call successors, (3), 3 states have call predecessors, (3), 6 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 03:30:56,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 327 transitions. [2022-11-03 03:30:56,677 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 327 transitions. Word has length 49 [2022-11-03 03:30:56,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:56,677 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 327 transitions. [2022-11-03 03:30:56,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:30:56,678 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 327 transitions. [2022-11-03 03:30:56,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 03:30:56,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:56,678 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:56,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:56,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:30:56,893 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:30:56,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:56,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1724095954, now seen corresponding path program 1 times [2022-11-03 03:30:56,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:30:56,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1611128793] [2022-11-03 03:30:56,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:56,894 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:30:56,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:30:56,895 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:30:56,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 03:30:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:57,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:30:57,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:57,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:30:57,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:30:57,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 9 [2022-11-03 03:30:57,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-03 03:30:57,436 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:30:57,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:57,436 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:30:57,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1611128793] [2022-11-03 03:30:57,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1611128793] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:57,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:57,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:30:57,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949153782] [2022-11-03 03:30:57,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:57,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:30:57,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:30:57,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:30:57,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:30:57,438 INFO L87 Difference]: Start difference. First operand 298 states and 327 transitions. Second operand has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:30:58,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:58,199 INFO L93 Difference]: Finished difference Result 336 states and 366 transitions. [2022-11-03 03:30:58,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:30:58,200 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-11-03 03:30:58,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:58,202 INFO L225 Difference]: With dead ends: 336 [2022-11-03 03:30:58,202 INFO L226 Difference]: Without dead ends: 336 [2022-11-03 03:30:58,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:30:58,203 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 285 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:58,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 311 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:30:58,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-11-03 03:30:58,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 297. [2022-11-03 03:30:58,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 249 states have (on average 1.2650602409638554) internal successors, (315), 288 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 6 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 03:30:58,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 326 transitions. [2022-11-03 03:30:58,210 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 326 transitions. Word has length 49 [2022-11-03 03:30:58,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:58,210 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 326 transitions. [2022-11-03 03:30:58,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:30:58,211 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 326 transitions. [2022-11-03 03:30:58,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 03:30:58,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:58,212 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:58,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:58,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:30:58,419 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:30:58,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:58,420 INFO L85 PathProgramCache]: Analyzing trace with hash -498440897, now seen corresponding path program 1 times [2022-11-03 03:30:58,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:30:58,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776509957] [2022-11-03 03:30:58,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:58,421 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:30:58,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:30:58,422 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:30:58,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 03:30:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:58,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 03:30:58,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:58,884 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:30:58,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 9 [2022-11-03 03:30:59,203 INFO L356 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2022-11-03 03:30:59,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 34 [2022-11-03 03:30:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:30:59,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:03,408 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:31:03,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776509957] [2022-11-03 03:31:03,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776509957] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:03,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [801707052] [2022-11-03 03:31:03,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:03,409 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:31:03,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:31:03,410 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:31:03,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-03 03:31:04,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:04,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:31:04,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:04,282 INFO L390 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 7 treesize of output 5 [2022-11-03 03:31:05,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:05,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:05,107 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:31:05,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 31 [2022-11-03 03:31:05,188 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:31:05,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:31:05,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [801707052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:05,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:31:05,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2022-11-03 03:31:05,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63444972] [2022-11-03 03:31:05,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:05,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:31:05,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:31:05,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:31:05,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=170, Unknown=2, NotChecked=0, Total=210 [2022-11-03 03:31:05,190 INFO L87 Difference]: Start difference. First operand 297 states and 326 transitions. Second operand has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:31:05,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:05,614 INFO L93 Difference]: Finished difference Result 314 states and 345 transitions. [2022-11-03 03:31:05,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:31:05,614 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-11-03 03:31:05,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:05,616 INFO L225 Difference]: With dead ends: 314 [2022-11-03 03:31:05,616 INFO L226 Difference]: Without dead ends: 314 [2022-11-03 03:31:05,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=50, Invalid=220, Unknown=2, NotChecked=0, Total=272 [2022-11-03 03:31:05,617 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 14 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:05,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 567 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 135 Unchecked, 0.4s Time] [2022-11-03 03:31:05,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-11-03 03:31:05,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 307. [2022-11-03 03:31:05,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 259 states have (on average 1.2625482625482625) internal successors, (327), 297 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-03 03:31:05,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 337 transitions. [2022-11-03 03:31:05,624 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 337 transitions. Word has length 50 [2022-11-03 03:31:05,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:05,624 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 337 transitions. [2022-11-03 03:31:05,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:31:05,625 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 337 transitions. [2022-11-03 03:31:05,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 03:31:05,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:05,626 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:05,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:05,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:06,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:31:06,026 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:31:06,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:06,027 INFO L85 PathProgramCache]: Analyzing trace with hash -498440896, now seen corresponding path program 1 times [2022-11-03 03:31:06,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:31:06,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [196285988] [2022-11-03 03:31:06,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:06,027 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:31:06,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:31:06,028 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:31:06,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-03 03:31:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:06,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:31:06,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:06,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:31:06,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 9 [2022-11-03 03:31:07,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:07,075 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 03:31:07,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 29 [2022-11-03 03:31:07,106 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 03:31:07,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 03:31:07,245 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:31:07,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:09,593 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:31:09,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [196285988] [2022-11-03 03:31:09,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [196285988] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:09,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [590935616] [2022-11-03 03:31:09,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:09,593 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:31:09,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:31:09,595 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:31:09,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-03 03:31:10,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:10,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:31:10,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:10,382 INFO L390 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 [2022-11-03 03:31:10,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:10,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 03:31:10,702 INFO L390 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 13 treesize of output 9 [2022-11-03 03:31:11,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:11,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:11,789 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:31:11,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 28 [2022-11-03 03:31:11,988 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:31:11,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:31:11,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [590935616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:11,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:31:11,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2022-11-03 03:31:11,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140320855] [2022-11-03 03:31:11,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:11,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:31:11,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:31:11,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:31:11,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=258, Unknown=1, NotChecked=0, Total=306 [2022-11-03 03:31:11,991 INFO L87 Difference]: Start difference. First operand 307 states and 337 transitions. Second operand has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:31:12,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:12,791 INFO L93 Difference]: Finished difference Result 308 states and 337 transitions. [2022-11-03 03:31:12,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:31:12,792 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-11-03 03:31:12,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:12,794 INFO L225 Difference]: With dead ends: 308 [2022-11-03 03:31:12,794 INFO L226 Difference]: Without dead ends: 308 [2022-11-03 03:31:12,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=60, Invalid=319, Unknown=1, NotChecked=0, Total=380 [2022-11-03 03:31:12,795 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 16 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:12,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 512 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 177 Invalid, 0 Unknown, 123 Unchecked, 0.6s Time] [2022-11-03 03:31:12,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-11-03 03:31:12,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 298. [2022-11-03 03:31:12,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 251 states have (on average 1.2629482071713147) internal successors, (317), 289 states have internal predecessors, (317), 3 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-03 03:31:12,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 326 transitions. [2022-11-03 03:31:12,801 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 326 transitions. Word has length 50 [2022-11-03 03:31:12,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:12,802 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 326 transitions. [2022-11-03 03:31:12,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:31:12,802 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 326 transitions. [2022-11-03 03:31:12,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 03:31:12,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:12,803 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:12,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:13,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:13,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:31:13,219 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:31:13,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:13,220 INFO L85 PathProgramCache]: Analyzing trace with hash -42553449, now seen corresponding path program 1 times [2022-11-03 03:31:13,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:31:13,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120401747] [2022-11-03 03:31:13,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:13,220 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:31:13,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:31:13,221 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:31:13,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 03:31:13,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:13,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:31:13,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:13,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:31:13,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 11 [2022-11-03 03:31:13,772 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:31:13,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:31:13,772 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:31:13,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120401747] [2022-11-03 03:31:13,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120401747] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:13,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:31:13,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:31:13,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990437215] [2022-11-03 03:31:13,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:13,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:31:13,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:31:13,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:31:13,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:31:13,774 INFO L87 Difference]: Start difference. First operand 298 states and 326 transitions. Second operand has 6 states, 5 states have (on average 8.2) internal successors, (41), 6 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:31:14,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:14,643 INFO L93 Difference]: Finished difference Result 320 states and 349 transitions. [2022-11-03 03:31:14,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:31:14,644 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 6 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-11-03 03:31:14,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:14,645 INFO L225 Difference]: With dead ends: 320 [2022-11-03 03:31:14,645 INFO L226 Difference]: Without dead ends: 320 [2022-11-03 03:31:14,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:31:14,646 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 135 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:14,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 362 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 03:31:14,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-11-03 03:31:14,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 297. [2022-11-03 03:31:14,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 251 states have (on average 1.2589641434262948) internal successors, (316), 288 states have internal predecessors, (316), 3 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-03 03:31:14,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 325 transitions. [2022-11-03 03:31:14,653 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 325 transitions. Word has length 53 [2022-11-03 03:31:14,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:14,653 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 325 transitions. [2022-11-03 03:31:14,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 6 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:31:14,654 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 325 transitions. [2022-11-03 03:31:14,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 03:31:14,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:14,654 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:14,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:14,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:31:14,855 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:31:14,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:14,855 INFO L85 PathProgramCache]: Analyzing trace with hash -42553448, now seen corresponding path program 1 times [2022-11-03 03:31:14,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:31:14,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457607441] [2022-11-03 03:31:14,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:14,856 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:31:14,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:31:14,862 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:31:14,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-03 03:31:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:15,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:31:15,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:15,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:31:15,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:31:15,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-03 03:31:15,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 9 [2022-11-03 03:31:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:31:15,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:31:15,519 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:31:15,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457607441] [2022-11-03 03:31:15,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457607441] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:15,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:31:15,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:31:15,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869459110] [2022-11-03 03:31:15,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:15,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:31:15,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:31:15,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:31:15,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:31:15,520 INFO L87 Difference]: Start difference. First operand 297 states and 325 transitions. Second operand has 6 states, 5 states have (on average 8.2) internal successors, (41), 6 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:31:16,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:16,317 INFO L93 Difference]: Finished difference Result 336 states and 365 transitions. [2022-11-03 03:31:16,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:31:16,318 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 6 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-11-03 03:31:16,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:16,320 INFO L225 Difference]: With dead ends: 336 [2022-11-03 03:31:16,321 INFO L226 Difference]: Without dead ends: 336 [2022-11-03 03:31:16,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:31:16,321 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 268 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:16,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 314 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:31:16,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-11-03 03:31:16,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 296. [2022-11-03 03:31:16,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 251 states have (on average 1.254980079681275) internal successors, (315), 287 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-03 03:31:16,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 324 transitions. [2022-11-03 03:31:16,328 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 324 transitions. Word has length 53 [2022-11-03 03:31:16,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:16,328 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 324 transitions. [2022-11-03 03:31:16,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 6 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:31:16,329 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 324 transitions. [2022-11-03 03:31:16,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 03:31:16,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:16,329 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:16,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:16,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:31:16,544 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting create_dataErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:31:16,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:16,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1556982670, now seen corresponding path program 1 times [2022-11-03 03:31:16,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:31:16,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1118660440] [2022-11-03 03:31:16,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:16,545 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:31:16,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:31:16,546 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:31:16,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-03 03:31:17,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:17,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:31:17,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:17,149 INFO L390 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 7 [2022-11-03 03:31:17,218 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:31:17,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-03 03:31:17,237 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:31:17,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:31:17,293 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:31:17,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1118660440] [2022-11-03 03:31:17,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1118660440] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:17,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1130229718] [2022-11-03 03:31:17,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:17,294 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:31:17,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:31:17,294 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:31:17,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-03 03:31:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:18,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:31:18,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:18,423 INFO L390 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 7 [2022-11-03 03:31:18,473 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:31:18,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-03 03:31:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:31:18,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:18,539 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:31:18,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1130229718] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:18,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595162798] [2022-11-03 03:31:18,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:18,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:18,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:18,542 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:31:18,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-03 03:31:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:18,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:31:18,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:18,969 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:31:18,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-03 03:31:18,984 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:31:18,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:31:19,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595162798] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:19,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:31:19,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 3 [2022-11-03 03:31:19,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507637998] [2022-11-03 03:31:19,046 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:31:19,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:31:19,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:31:19,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:31:19,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:31:19,048 INFO L87 Difference]: Start difference. First operand 296 states and 324 transitions. Second operand has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:19,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:19,501 INFO L93 Difference]: Finished difference Result 301 states and 329 transitions. [2022-11-03 03:31:19,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:31:19,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-03 03:31:19,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:19,504 INFO L225 Difference]: With dead ends: 301 [2022-11-03 03:31:19,504 INFO L226 Difference]: Without dead ends: 301 [2022-11-03 03:31:19,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 306 SyntacticMatches, 5 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:31:19,504 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 49 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:19,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 240 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:31:19,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-11-03 03:31:19,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 295. [2022-11-03 03:31:19,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 251 states have (on average 1.247011952191235) internal successors, (313), 286 states have internal predecessors, (313), 3 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-03 03:31:19,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 322 transitions. [2022-11-03 03:31:19,511 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 322 transitions. Word has length 53 [2022-11-03 03:31:19,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:19,512 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 322 transitions. [2022-11-03 03:31:19,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:19,512 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 322 transitions. [2022-11-03 03:31:19,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 03:31:19,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:19,513 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:19,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:19,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:19,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:20,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:31:20,132 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting create_dataErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:31:20,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:20,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1556982671, now seen corresponding path program 1 times [2022-11-03 03:31:20,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:31:20,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801597354] [2022-11-03 03:31:20,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:20,134 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:31:20,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:31:20,134 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:31:20,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-03 03:31:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:20,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:31:20,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:20,834 INFO L390 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 [2022-11-03 03:31:20,937 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:31:20,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 03:31:20,957 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:31:20,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:21,395 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:31:21,396 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:31:21,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801597354] [2022-11-03 03:31:21,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801597354] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:21,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1857533138] [2022-11-03 03:31:21,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:21,397 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:31:21,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:31:21,404 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:31:21,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-03 03:31:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:22,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:31:22,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:22,668 INFO L390 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 7 [2022-11-03 03:31:22,677 INFO L390 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 [2022-11-03 03:31:22,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:22,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 03:31:22,838 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 03:31:22,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 03:31:22,848 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:31:22,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:25,681 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:31:25,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1857533138] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:25,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658539135] [2022-11-03 03:31:25,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:25,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:25,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:25,682 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:31:25,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-03 03:31:26,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:26,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:31:26,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:26,113 INFO L390 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 [2022-11-03 03:31:26,122 INFO L390 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 7 [2022-11-03 03:31:26,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:26,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 03:31:26,251 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 03:31:26,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 03:31:26,266 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:31:26,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:26,598 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:31:26,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658539135] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:26,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:31:26,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4, 4, 4, 4] total 10 [2022-11-03 03:31:26,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611794139] [2022-11-03 03:31:26,599 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:31:26,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 03:31:26,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:31:26,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 03:31:26,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=79, Unknown=1, NotChecked=0, Total=110 [2022-11-03 03:31:26,600 INFO L87 Difference]: Start difference. First operand 295 states and 322 transitions. Second operand has 11 states, 10 states have (on average 8.0) internal successors, (80), 11 states have internal predecessors, (80), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:27,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:27,298 INFO L93 Difference]: Finished difference Result 297 states and 321 transitions. [2022-11-03 03:31:27,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:31:27,299 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 8.0) internal successors, (80), 11 states have internal predecessors, (80), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-03 03:31:27,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:27,300 INFO L225 Difference]: With dead ends: 297 [2022-11-03 03:31:27,300 INFO L226 Difference]: Without dead ends: 297 [2022-11-03 03:31:27,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 302 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=51, Invalid=104, Unknown=1, NotChecked=0, Total=156 [2022-11-03 03:31:27,301 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 118 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:27,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 496 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 155 Invalid, 0 Unknown, 189 Unchecked, 0.6s Time] [2022-11-03 03:31:27,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-11-03 03:31:27,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 275. [2022-11-03 03:31:27,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 235 states have (on average 1.221276595744681) internal successors, (287), 266 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-03 03:31:27,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 296 transitions. [2022-11-03 03:31:27,306 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 296 transitions. Word has length 53 [2022-11-03 03:31:27,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:27,307 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 296 transitions. [2022-11-03 03:31:27,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 8.0) internal successors, (80), 11 states have internal predecessors, (80), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:27,307 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 296 transitions. [2022-11-03 03:31:27,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 03:31:27,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:27,308 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:27,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:27,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Ended with exit code 0 [2022-11-03 03:31:27,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:27,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:27,917 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:31:27,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:27,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1319156755, now seen corresponding path program 1 times [2022-11-03 03:31:27,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:31:27,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440411440] [2022-11-03 03:31:27,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:27,918 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:31:27,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:31:27,919 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:31:27,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-03 03:31:28,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:28,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 03:31:28,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:28,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:31:28,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:31:28,799 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:31:28,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-03 03:31:28,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-03 03:31:29,033 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:31:29,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 29 [2022-11-03 03:31:29,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:31:29,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:31:29,072 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:31:29,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [440411440] [2022-11-03 03:31:29,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [440411440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:29,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:31:29,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:31:29,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426115261] [2022-11-03 03:31:29,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:29,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 03:31:29,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:31:29,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 03:31:29,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:31:29,074 INFO L87 Difference]: Start difference. First operand 275 states and 296 transitions. Second operand has 11 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:31:30,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:30,755 INFO L93 Difference]: Finished difference Result 413 states and 457 transitions. [2022-11-03 03:31:30,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 03:31:30,756 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-11-03 03:31:30,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:30,758 INFO L225 Difference]: With dead ends: 413 [2022-11-03 03:31:30,758 INFO L226 Difference]: Without dead ends: 413 [2022-11-03 03:31:30,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:31:30,759 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 247 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:30,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 606 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 539 Invalid, 0 Unknown, 102 Unchecked, 1.4s Time] [2022-11-03 03:31:30,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-11-03 03:31:30,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 314. [2022-11-03 03:31:30,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 271 states have (on average 1.2583025830258303) internal successors, (341), 300 states have internal predecessors, (341), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (13), 10 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-03 03:31:30,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 359 transitions. [2022-11-03 03:31:30,767 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 359 transitions. Word has length 54 [2022-11-03 03:31:30,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:30,767 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 359 transitions. [2022-11-03 03:31:30,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:31:30,768 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 359 transitions. [2022-11-03 03:31:30,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 03:31:30,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:30,769 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:30,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:30,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:31:30,985 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:31:30,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:30,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1319156754, now seen corresponding path program 1 times [2022-11-03 03:31:30,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:31:30,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1386093663] [2022-11-03 03:31:30,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:30,986 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:31:30,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:31:30,988 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:31:31,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-03 03:31:31,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:31,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-03 03:31:31,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:31,701 INFO L390 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 7 [2022-11-03 03:31:31,735 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 03:31:31,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 03:31:31,833 INFO L390 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 10 treesize of output 8 [2022-11-03 03:31:31,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-03 03:31:32,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:31:32,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:31:32,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-03 03:31:32,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 03:31:32,519 INFO L356 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2022-11-03 03:31:32,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 37 [2022-11-03 03:31:32,540 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-03 03:31:32,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-11-03 03:31:32,589 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:31:32,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:31:32,590 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:31:32,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1386093663] [2022-11-03 03:31:32,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1386093663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:32,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:31:32,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-03 03:31:32,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266253385] [2022-11-03 03:31:32,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:32,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 03:31:32,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:31:32,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 03:31:32,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:31:32,592 INFO L87 Difference]: Start difference. First operand 314 states and 359 transitions. Second operand has 12 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:31:35,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:35,483 INFO L93 Difference]: Finished difference Result 517 states and 579 transitions. [2022-11-03 03:31:35,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 03:31:35,484 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-11-03 03:31:35,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:35,487 INFO L225 Difference]: With dead ends: 517 [2022-11-03 03:31:35,487 INFO L226 Difference]: Without dead ends: 517 [2022-11-03 03:31:35,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:31:35,488 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 306 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:35,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 792 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 799 Invalid, 0 Unknown, 110 Unchecked, 2.4s Time] [2022-11-03 03:31:35,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-11-03 03:31:35,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 335. [2022-11-03 03:31:35,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 291 states have (on average 1.2646048109965635) internal successors, (368), 319 states have internal predecessors, (368), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (16), 12 states have call predecessors, (16), 6 states have call successors, (16) [2022-11-03 03:31:35,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 390 transitions. [2022-11-03 03:31:35,497 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 390 transitions. Word has length 54 [2022-11-03 03:31:35,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:35,498 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 390 transitions. [2022-11-03 03:31:35,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:31:35,498 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 390 transitions. [2022-11-03 03:31:35,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 03:31:35,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:35,499 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:35,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:35,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:31:35,716 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:31:35,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:35,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1610777395, now seen corresponding path program 1 times [2022-11-03 03:31:35,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:31:35,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812227854] [2022-11-03 03:31:35,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:35,718 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:31:35,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:31:35,719 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:31:35,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-03 03:31:36,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:36,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 03:31:36,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:36,459 INFO L390 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 7 [2022-11-03 03:31:37,199 INFO L356 Elim1Store]: treesize reduction 123, result has 21.7 percent of original size [2022-11-03 03:31:37,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 34 treesize of output 56 [2022-11-03 03:31:37,256 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:31:37,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:41,418 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:31:41,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1812227854] [2022-11-03 03:31:41,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1812227854] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:41,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [316317885] [2022-11-03 03:31:41,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:41,419 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:31:41,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:31:41,419 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:31:41,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-11-03 03:31:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:42,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:31:42,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:42,593 INFO L390 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 7 [2022-11-03 03:31:54,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:54,894 INFO L356 Elim1Store]: treesize reduction 91, result has 27.2 percent of original size [2022-11-03 03:31:54,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 53 [2022-11-03 03:31:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:31:54,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:00,054 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:32:00,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [316317885] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:32:00,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:32:00,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 8] total 15 [2022-11-03 03:32:00,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009120630] [2022-11-03 03:32:00,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:00,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:32:00,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:00,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:32:00,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=194, Unknown=6, NotChecked=0, Total=272 [2022-11-03 03:32:00,056 INFO L87 Difference]: Start difference. First operand 335 states and 390 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:32:00,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:00,269 INFO L93 Difference]: Finished difference Result 382 states and 445 transitions. [2022-11-03 03:32:00,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:32:00,270 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-11-03 03:32:00,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:00,272 INFO L225 Difference]: With dead ends: 382 [2022-11-03 03:32:00,272 INFO L226 Difference]: Without dead ends: 382 [2022-11-03 03:32:00,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 146 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=72, Invalid=194, Unknown=6, NotChecked=0, Total=272 [2022-11-03 03:32:00,272 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 70 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:00,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 228 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2022-11-03 03:32:00,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-11-03 03:32:00,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 357. [2022-11-03 03:32:00,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 312 states have (on average 1.2628205128205128) internal successors, (394), 339 states have internal predecessors, (394), 6 states have call successors, (6), 3 states have call predecessors, (6), 7 states have return successors, (20), 14 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-03 03:32:00,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 420 transitions. [2022-11-03 03:32:00,281 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 420 transitions. Word has length 55 [2022-11-03 03:32:00,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:00,282 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 420 transitions. [2022-11-03 03:32:00,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:32:00,282 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 420 transitions. [2022-11-03 03:32:00,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 03:32:00,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:00,283 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:00,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (59)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:00,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:00,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:32:00,699 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:32:00,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:00,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1610777396, now seen corresponding path program 1 times [2022-11-03 03:32:00,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:00,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1907903887] [2022-11-03 03:32:00,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:00,700 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:00,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:00,701 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:00,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-03 03:32:01,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:01,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:32:01,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:01,460 INFO L390 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 [2022-11-03 03:32:01,467 INFO L390 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 7 [2022-11-03 03:32:03,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:03,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:03,449 INFO L356 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-11-03 03:32:03,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 39 [2022-11-03 03:32:03,514 INFO L356 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-11-03 03:32:03,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 38 [2022-11-03 03:32:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:32:03,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:05,906 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_append_~node~0#1.offset|))) (and (or (forall ((v_ArrVal_5587 (_ BitVec 32)) (v_create_data_~data~0.base_102 (_ BitVec 32)) (v_ArrVal_5588 (_ BitVec 1))) (or (not (= (select (store |c_#valid| v_create_data_~data~0.base_102 v_ArrVal_5588) v_ArrVal_5587) (_ bv0 1))) (not (= (_ bv0 1) (select |c_#valid| v_create_data_~data~0.base_102))))) (bvule |c_ULTIMATE.start_append_~node~0#1.offset| .cse0)) (forall ((v_create_data_~data~0.base_102 (_ BitVec 32))) (or (forall ((v_ArrVal_5587 (_ BitVec 32)) (v_ArrVal_5588 (_ BitVec 1))) (or (not (= (select (store |c_#valid| v_create_data_~data~0.base_102 v_ArrVal_5588) v_ArrVal_5587) (_ bv0 1))) (forall ((v_create_data_~nextData~0.base_36 (_ BitVec 32)) (v_ArrVal_5586 (_ BitVec 32)) (v_ArrVal_5585 (_ BitVec 32))) (bvule .cse0 (select (store (store (store |c_#length| v_create_data_~data~0.base_102 v_ArrVal_5585) v_ArrVal_5587 v_ArrVal_5586) v_create_data_~nextData~0.base_36 (_ bv16 32)) |c_ULTIMATE.start_append_~node~0#1.base|))))) (not (= (_ bv0 1) (select |c_#valid| v_create_data_~data~0.base_102))))))) is different from false [2022-11-03 03:32:05,912 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:05,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1907903887] [2022-11-03 03:32:05,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1907903887] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:32:05,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1644835913] [2022-11-03 03:32:05,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:05,913 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:05,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:32:05,914 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:32:05,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-11-03 03:32:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:07,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 03:32:07,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:07,435 INFO L390 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 7 [2022-11-03 03:32:07,441 INFO L390 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 [2022-11-03 03:32:28,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:28,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:28,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:28,960 INFO L356 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-03 03:32:28,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 36 [2022-11-03 03:32:29,016 INFO L356 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-03 03:32:29,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-11-03 03:32:29,051 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:32:29,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:29,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1644835913] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:32:29,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566714924] [2022-11-03 03:32:29,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:29,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:29,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:29,485 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:32:29,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-03 03:32:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:30,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:32:30,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:30,040 INFO L390 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 [2022-11-03 03:32:41,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:41,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:41,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:41,144 INFO L356 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-03 03:32:41,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 36 [2022-11-03 03:32:41,208 INFO L356 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-03 03:32:41,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-11-03 03:32:41,236 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:32:41,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:45,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566714924] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:32:45,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:32:45,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 14 [2022-11-03 03:32:45,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840412893] [2022-11-03 03:32:45,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:32:45,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 03:32:45,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:45,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 03:32:45,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=246, Unknown=13, NotChecked=32, Total=342 [2022-11-03 03:32:45,666 INFO L87 Difference]: Start difference. First operand 357 states and 420 transitions. Second operand has 15 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 03:32:46,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:46,507 INFO L93 Difference]: Finished difference Result 496 states and 577 transitions. [2022-11-03 03:32:46,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:32:46,508 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2022-11-03 03:32:46,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:46,511 INFO L225 Difference]: With dead ends: 496 [2022-11-03 03:32:46,511 INFO L226 Difference]: Without dead ends: 496 [2022-11-03 03:32:46,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 38.6s TimeCoverageRelationStatistics Valid=59, Invalid=274, Unknown=13, NotChecked=34, Total=380 [2022-11-03 03:32:46,512 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 121 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 358 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:46,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 977 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 305 Invalid, 0 Unknown, 358 Unchecked, 0.8s Time] [2022-11-03 03:32:46,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-11-03 03:32:46,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 372. [2022-11-03 03:32:46,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 326 states have (on average 1.2546012269938651) internal successors, (409), 353 states have internal predecessors, (409), 6 states have call successors, (6), 3 states have call predecessors, (6), 8 states have return successors, (24), 15 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-03 03:32:46,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 439 transitions. [2022-11-03 03:32:46,523 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 439 transitions. Word has length 55 [2022-11-03 03:32:46,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:46,523 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 439 transitions. [2022-11-03 03:32:46,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 03:32:46,524 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 439 transitions. [2022-11-03 03:32:46,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 03:32:46,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:46,525 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:46,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (61)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:46,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:46,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:47,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:47,136 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:32:47,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:47,136 INFO L85 PathProgramCache]: Analyzing trace with hash 948367782, now seen corresponding path program 1 times [2022-11-03 03:32:47,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:47,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1487685839] [2022-11-03 03:32:47,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:47,137 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:47,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:47,138 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:47,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-03 03:32:47,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:47,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:32:47,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:47,769 INFO L390 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 7 [2022-11-03 03:32:47,837 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:32:47,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 9 [2022-11-03 03:32:48,278 INFO L356 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2022-11-03 03:32:48,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 34 [2022-11-03 03:32:48,336 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:32:48,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:52,520 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:52,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1487685839] [2022-11-03 03:32:52,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1487685839] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:32:52,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [967240602] [2022-11-03 03:32:52,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:52,521 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:52,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:32:52,522 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:32:52,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-11-03 03:32:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:53,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:32:53,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:53,579 INFO L390 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 7 [2022-11-03 03:32:56,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:56,109 INFO L356 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2022-11-03 03:32:56,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 31 [2022-11-03 03:32:56,125 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:32:56,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:32:56,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [967240602] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:56,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:32:56,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 10 [2022-11-03 03:32:56,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765953275] [2022-11-03 03:32:56,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:56,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:32:56,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:56,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:32:56,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=94, Unknown=3, NotChecked=0, Total=132 [2022-11-03 03:32:56,127 INFO L87 Difference]: Start difference. First operand 372 states and 439 transitions. Second operand has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 7 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:32:56,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:56,559 INFO L93 Difference]: Finished difference Result 414 states and 490 transitions. [2022-11-03 03:32:56,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:32:56,568 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 7 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-11-03 03:32:56,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:56,571 INFO L225 Difference]: With dead ends: 414 [2022-11-03 03:32:56,571 INFO L226 Difference]: Without dead ends: 414 [2022-11-03 03:32:56,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=35, Invalid=94, Unknown=3, NotChecked=0, Total=132 [2022-11-03 03:32:56,572 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 70 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:56,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 372 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 139 Invalid, 0 Unknown, 100 Unchecked, 0.4s Time] [2022-11-03 03:32:56,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-11-03 03:32:56,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 381. [2022-11-03 03:32:56,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 334 states have (on average 1.2574850299401197) internal successors, (420), 360 states have internal predecessors, (420), 6 states have call successors, (6), 3 states have call predecessors, (6), 9 states have return successors, (28), 17 states have call predecessors, (28), 6 states have call successors, (28) [2022-11-03 03:32:56,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 454 transitions. [2022-11-03 03:32:56,583 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 454 transitions. Word has length 56 [2022-11-03 03:32:56,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:56,584 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 454 transitions. [2022-11-03 03:32:56,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 7 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:32:56,585 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 454 transitions. [2022-11-03 03:32:56,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 03:32:56,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:56,585 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:56,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:56,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (64)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:57,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:57,004 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:32:57,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:57,004 INFO L85 PathProgramCache]: Analyzing trace with hash 948367783, now seen corresponding path program 1 times [2022-11-03 03:32:57,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:57,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1865888487] [2022-11-03 03:32:57,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:57,005 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:57,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:57,006 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:57,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-03 03:32:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:57,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:32:57,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:57,620 INFO L390 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 [2022-11-03 03:32:57,627 INFO L390 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 7 [2022-11-03 03:32:57,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:32:57,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 9 [2022-11-03 03:32:58,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:58,317 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 03:32:58,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 27 [2022-11-03 03:32:58,338 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 03:32:58,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 03:32:58,405 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:32:58,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:58,782 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:58,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1865888487] [2022-11-03 03:32:58,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1865888487] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:32:58,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1945797956] [2022-11-03 03:32:58,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:58,783 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:58,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:32:58,784 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:32:58,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2022-11-03 03:33:00,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:00,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:33:00,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:00,142 INFO L390 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 [2022-11-03 03:33:00,149 INFO L390 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 7 [2022-11-03 03:33:00,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:00,797 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 03:33:00,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 27 [2022-11-03 03:33:00,825 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 03:33:00,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 03:33:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:33:00,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:00,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1945797956] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:00,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:33:00,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2022-11-03 03:33:00,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591238537] [2022-11-03 03:33:00,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:00,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:33:00,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:00,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:33:00,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:33:00,849 INFO L87 Difference]: Start difference. First operand 381 states and 454 transitions. Second operand has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:33:01,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:01,612 INFO L93 Difference]: Finished difference Result 441 states and 521 transitions. [2022-11-03 03:33:01,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:33:01,613 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-11-03 03:33:01,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:01,615 INFO L225 Difference]: With dead ends: 441 [2022-11-03 03:33:01,615 INFO L226 Difference]: Without dead ends: 441 [2022-11-03 03:33:01,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:33:01,616 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 63 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:01,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 617 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 237 Invalid, 0 Unknown, 260 Unchecked, 0.7s Time] [2022-11-03 03:33:01,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-11-03 03:33:01,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 380. [2022-11-03 03:33:01,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 333 states have (on average 1.2492492492492493) internal successors, (416), 360 states have internal predecessors, (416), 6 states have call successors, (6), 3 states have call predecessors, (6), 9 states have return successors, (28), 16 states have call predecessors, (28), 6 states have call successors, (28) [2022-11-03 03:33:01,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 450 transitions. [2022-11-03 03:33:01,625 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 450 transitions. Word has length 56 [2022-11-03 03:33:01,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:01,626 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 450 transitions. [2022-11-03 03:33:01,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:33:01,626 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 450 transitions. [2022-11-03 03:33:01,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 03:33:01,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:01,627 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:01,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (66)] Ended with exit code 0 [2022-11-03 03:33:01,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:02,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:02,038 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr51ASSERT_VIOLATIONMEMORY_LEAK === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:33:02,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:02,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1897094198, now seen corresponding path program 1 times [2022-11-03 03:33:02,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:02,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850480612] [2022-11-03 03:33:02,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:02,040 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:02,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:02,041 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:02,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-03 03:33:02,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:02,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:33:02,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:02,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:33:02,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 8 [2022-11-03 03:33:02,709 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:33:02,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:02,709 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:02,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850480612] [2022-11-03 03:33:02,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [850480612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:02,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:02,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:33:02,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187897811] [2022-11-03 03:33:02,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:02,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:33:02,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:02,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:33:02,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:33:02,711 INFO L87 Difference]: Start difference. First operand 380 states and 450 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:33:03,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:03,197 INFO L93 Difference]: Finished difference Result 418 states and 488 transitions. [2022-11-03 03:33:03,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:33:03,198 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-11-03 03:33:03,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:03,200 INFO L225 Difference]: With dead ends: 418 [2022-11-03 03:33:03,201 INFO L226 Difference]: Without dead ends: 418 [2022-11-03 03:33:03,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:33:03,201 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 149 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:03,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 353 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:33:03,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-11-03 03:33:03,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 382. [2022-11-03 03:33:03,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 335 states have (on average 1.2477611940298508) internal successors, (418), 362 states have internal predecessors, (418), 6 states have call successors, (6), 3 states have call predecessors, (6), 9 states have return successors, (28), 16 states have call predecessors, (28), 6 states have call successors, (28) [2022-11-03 03:33:03,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 452 transitions. [2022-11-03 03:33:03,210 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 452 transitions. Word has length 57 [2022-11-03 03:33:03,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:03,211 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 452 transitions. [2022-11-03 03:33:03,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:33:03,211 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 452 transitions. [2022-11-03 03:33:03,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 03:33:03,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:03,212 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:03,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:03,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:03,427 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:33:03,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:03,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1897093746, now seen corresponding path program 1 times [2022-11-03 03:33:03,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:03,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [230350340] [2022-11-03 03:33:03,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:03,428 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:03,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:03,429 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:03,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-03 03:33:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:03,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:33:03,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:04,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:33:04,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 11 [2022-11-03 03:33:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:33:04,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:04,085 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:04,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [230350340] [2022-11-03 03:33:04,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [230350340] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:04,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:04,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:33:04,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597782063] [2022-11-03 03:33:04,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:04,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:33:04,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:04,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:33:04,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:33:04,087 INFO L87 Difference]: Start difference. First operand 382 states and 452 transitions. Second operand has 6 states, 5 states have (on average 9.0) internal successors, (45), 6 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:33:04,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:04,836 INFO L93 Difference]: Finished difference Result 400 states and 470 transitions. [2022-11-03 03:33:04,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:33:04,837 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 6 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-11-03 03:33:04,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:04,839 INFO L225 Difference]: With dead ends: 400 [2022-11-03 03:33:04,839 INFO L226 Difference]: Without dead ends: 400 [2022-11-03 03:33:04,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:33:04,840 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 165 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:04,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 310 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:33:04,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-11-03 03:33:04,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 384. [2022-11-03 03:33:04,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 337 states have (on average 1.2492581602373887) internal successors, (421), 364 states have internal predecessors, (421), 6 states have call successors, (6), 3 states have call predecessors, (6), 9 states have return successors, (28), 16 states have call predecessors, (28), 6 states have call successors, (28) [2022-11-03 03:33:04,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 455 transitions. [2022-11-03 03:33:04,848 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 455 transitions. Word has length 57 [2022-11-03 03:33:04,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:04,848 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 455 transitions. [2022-11-03 03:33:04,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 6 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:33:04,848 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 455 transitions. [2022-11-03 03:33:04,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 03:33:04,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:04,849 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:04,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:05,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:05,065 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:33:05,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:05,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1897093745, now seen corresponding path program 1 times [2022-11-03 03:33:05,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:05,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109716031] [2022-11-03 03:33:05,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:05,066 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:05,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:05,067 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:05,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-03 03:33:05,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:05,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 03:33:05,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:05,700 INFO L390 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 7 [2022-11-03 03:33:05,708 INFO L390 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 [2022-11-03 03:33:05,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:33:05,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 9 [2022-11-03 03:33:06,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:06,346 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 03:33:06,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 27 [2022-11-03 03:33:06,371 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 03:33:06,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 03:33:06,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:33:06,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:33:06,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 33 treesize of output 21 [2022-11-03 03:33:06,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-03 03:33:06,883 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:33:06,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:07,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 40 treesize of output 32 [2022-11-03 03:33:07,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:07,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:07,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:07,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:17,976 WARN L234 SmtUtils]: Spent 10.26s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:33:17,977 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:17,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109716031] [2022-11-03 03:33:17,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109716031] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:17,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [785097115] [2022-11-03 03:33:17,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:17,978 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:33:17,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:33:17,979 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:33:17,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-11-03 03:33:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:19,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 03:33:19,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:19,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:33:20,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:33:20,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:20,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2022-11-03 03:33:20,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-03 03:33:20,506 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:33:20,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2022-11-03 03:33:20,703 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:33:20,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:20,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [785097115] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:20,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:33:20,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9] total 20 [2022-11-03 03:33:20,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098976044] [2022-11-03 03:33:20,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:20,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 03:33:20,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:20,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 03:33:20,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:33:20,706 INFO L87 Difference]: Start difference. First operand 384 states and 455 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:33:21,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:21,414 INFO L93 Difference]: Finished difference Result 425 states and 504 transitions. [2022-11-03 03:33:21,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:33:21,415 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-11-03 03:33:21,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:21,417 INFO L225 Difference]: With dead ends: 425 [2022-11-03 03:33:21,417 INFO L226 Difference]: Without dead ends: 425 [2022-11-03 03:33:21,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2022-11-03 03:33:21,418 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 39 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:21,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 931 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 163 Unchecked, 0.5s Time] [2022-11-03 03:33:21,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-11-03 03:33:21,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 393. [2022-11-03 03:33:21,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 346 states have (on average 1.2514450867052023) internal successors, (433), 371 states have internal predecessors, (433), 6 states have call successors, (6), 3 states have call predecessors, (6), 9 states have return successors, (28), 18 states have call predecessors, (28), 6 states have call successors, (28) [2022-11-03 03:33:21,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 467 transitions. [2022-11-03 03:33:21,444 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 467 transitions. Word has length 57 [2022-11-03 03:33:21,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:21,444 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 467 transitions. [2022-11-03 03:33:21,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:33:21,445 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 467 transitions. [2022-11-03 03:33:21,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 03:33:21,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:21,446 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:21,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (70)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:21,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-03 03:33:21,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:33:21,866 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:33:21,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:21,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1768854146, now seen corresponding path program 1 times [2022-11-03 03:33:21,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:21,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159850968] [2022-11-03 03:33:21,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:21,868 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:21,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:21,868 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:21,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-03 03:33:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:22,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 03:33:22,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:22,712 INFO L390 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 7 treesize of output 5 [2022-11-03 03:33:22,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:33:23,114 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:33:23,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 50 [2022-11-03 03:33:23,271 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:33:23,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 50 [2022-11-03 03:33:23,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 39 treesize of output 21 [2022-11-03 03:33:24,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:24,285 INFO L356 Elim1Store]: treesize reduction 96, result has 23.8 percent of original size [2022-11-03 03:33:24,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 34 treesize of output 52 [2022-11-03 03:33:24,467 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:33:24,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:24,798 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:24,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159850968] [2022-11-03 03:33:24,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159850968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:24,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [492222888] [2022-11-03 03:33:24,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:24,799 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:33:24,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:33:24,800 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:33:24,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2022-11-03 03:33:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:26,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:33:26,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:26,452 INFO L390 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 7 treesize of output 5 [2022-11-03 03:33:27,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:27,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:27,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:27,672 INFO L356 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-03 03:33:27,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 45 [2022-11-03 03:33:27,779 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:33:27,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:28,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [492222888] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:28,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888626670] [2022-11-03 03:33:28,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:28,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:28,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:28,086 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:28,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-11-03 03:33:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:28,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 03:33:28,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:28,780 INFO L390 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 7 [2022-11-03 03:33:28,869 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:33:28,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-03 03:33:29,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:33:29,371 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:33:29,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 43 [2022-11-03 03:33:29,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 30 treesize of output 18 [2022-11-03 03:33:38,289 INFO L356 Elim1Store]: treesize reduction 153, result has 18.2 percent of original size [2022-11-03 03:33:38,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 47 treesize of output 67 [2022-11-03 03:33:38,516 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:33:38,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:49,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888626670] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:49,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:33:49,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 10] total 23 [2022-11-03 03:33:49,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404560720] [2022-11-03 03:33:49,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:33:49,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 03:33:49,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:49,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 03:33:49,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=610, Unknown=9, NotChecked=0, Total=702 [2022-11-03 03:33:49,073 INFO L87 Difference]: Start difference. First operand 393 states and 467 transitions. Second operand has 24 states, 23 states have (on average 6.0) internal successors, (138), 24 states have internal predecessors, (138), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 03:34:14,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:14,838 INFO L93 Difference]: Finished difference Result 448 states and 531 transitions. [2022-11-03 03:34:14,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-03 03:34:14,839 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 6.0) internal successors, (138), 24 states have internal predecessors, (138), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2022-11-03 03:34:14,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:14,841 INFO L225 Difference]: With dead ends: 448 [2022-11-03 03:34:14,842 INFO L226 Difference]: Without dead ends: 448 [2022-11-03 03:34:14,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 45.0s TimeCoverageRelationStatistics Valid=179, Invalid=1208, Unknown=19, NotChecked=0, Total=1406 [2022-11-03 03:34:14,843 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 119 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 441 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:14,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 1066 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 311 Invalid, 0 Unknown, 441 Unchecked, 0.8s Time] [2022-11-03 03:34:14,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-11-03 03:34:14,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 412. [2022-11-03 03:34:14,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 364 states have (on average 1.2472527472527473) internal successors, (454), 389 states have internal predecessors, (454), 6 states have call successors, (6), 3 states have call predecessors, (6), 10 states have return successors, (28), 19 states have call predecessors, (28), 6 states have call successors, (28) [2022-11-03 03:34:14,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 488 transitions. [2022-11-03 03:34:14,862 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 488 transitions. Word has length 57 [2022-11-03 03:34:14,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:14,863 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 488 transitions. [2022-11-03 03:34:14,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 6.0) internal successors, (138), 24 states have internal predecessors, (138), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 03:34:14,863 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 488 transitions. [2022-11-03 03:34:14,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 03:34:14,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:14,864 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:14,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (72)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:15,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Ended with exit code 0 [2022-11-03 03:34:15,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:15,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:15,468 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:34:15,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:15,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1768854147, now seen corresponding path program 1 times [2022-11-03 03:34:15,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:34:15,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799519371] [2022-11-03 03:34:15,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:15,469 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:34:15,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:34:15,470 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:34:15,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-03 03:34:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:16,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 03:34:16,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:16,373 INFO L390 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 [2022-11-03 03:34:16,400 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:34:16,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-03 03:34:16,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:16,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 03:34:16,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:16,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:16,501 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 03:34:16,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 18 [2022-11-03 03:34:16,816 INFO L390 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 7 treesize of output 5 [2022-11-03 03:34:16,823 INFO L390 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 5 treesize of output 3 [2022-11-03 03:34:20,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:20,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:21,069 INFO L356 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-11-03 03:34:21,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 39 [2022-11-03 03:34:21,106 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 03:34:21,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 03:34:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:34:21,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:23,867 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:34:23,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799519371] [2022-11-03 03:34:23,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799519371] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:34:23,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [968021059] [2022-11-03 03:34:23,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:23,867 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:34:23,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:34:23,868 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:34:23,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2022-11-03 03:34:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:25,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:34:25,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:25,589 INFO L390 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 [2022-11-03 03:34:25,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:25,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 03:34:26,002 INFO L390 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 13 treesize of output 9 [2022-11-03 03:34:28,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:28,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:28,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:28,546 INFO L356 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-03 03:34:28,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 40 [2022-11-03 03:34:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:34:28,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:43,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [968021059] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:34:43,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197275724] [2022-11-03 03:34:43,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:43,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:43,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:34:43,947 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:34:43,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-11-03 03:34:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:44,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 03:34:44,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:44,805 INFO L390 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 7 [2022-11-03 03:34:44,814 INFO L390 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 [2022-11-03 03:34:44,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:44,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 03:34:44,924 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:34:44,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-03 03:34:47,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:47,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:47,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:47,135 INFO L356 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-03 03:34:47,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 36 [2022-11-03 03:34:47,231 INFO L356 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2022-11-03 03:34:47,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 37 [2022-11-03 03:34:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:34:47,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:51,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197275724] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:34:51,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:34:51,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 22 [2022-11-03 03:34:51,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894619405] [2022-11-03 03:34:51,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:34:51,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 03:34:51,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:34:51,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 03:34:51,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=611, Unknown=7, NotChecked=0, Total=702 [2022-11-03 03:34:51,558 INFO L87 Difference]: Start difference. First operand 412 states and 488 transitions. Second operand has 23 states, 22 states have (on average 6.090909090909091) internal successors, (134), 23 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 03:35:02,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:02,118 INFO L93 Difference]: Finished difference Result 447 states and 529 transitions. [2022-11-03 03:35:02,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:35:02,119 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 6.090909090909091) internal successors, (134), 23 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 57 [2022-11-03 03:35:02,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:02,120 INFO L225 Difference]: With dead ends: 447 [2022-11-03 03:35:02,120 INFO L226 Difference]: Without dead ends: 447 [2022-11-03 03:35:02,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 36.8s TimeCoverageRelationStatistics Valid=130, Invalid=855, Unknown=7, NotChecked=0, Total=992 [2022-11-03 03:35:02,121 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 47 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 1191 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 473 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:02,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 1191 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 245 Invalid, 0 Unknown, 473 Unchecked, 0.6s Time] [2022-11-03 03:35:02,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-11-03 03:35:02,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 415. [2022-11-03 03:35:02,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 367 states have (on average 1.2452316076294279) internal successors, (457), 391 states have internal predecessors, (457), 6 states have call successors, (6), 3 states have call predecessors, (6), 10 states have return successors, (28), 20 states have call predecessors, (28), 6 states have call successors, (28) [2022-11-03 03:35:02,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 491 transitions. [2022-11-03 03:35:02,130 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 491 transitions. Word has length 57 [2022-11-03 03:35:02,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:02,130 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 491 transitions. [2022-11-03 03:35:02,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 6.090909090909091) internal successors, (134), 23 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 03:35:02,130 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 491 transitions. [2022-11-03 03:35:02,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-03 03:35:02,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:02,131 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:02,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:02,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (75)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:02,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:02,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:02,732 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:35:02,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:02,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1423585987, now seen corresponding path program 1 times [2022-11-03 03:35:02,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:35:02,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084178707] [2022-11-03 03:35:02,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:02,733 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:35:02,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:35:02,734 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:35:02,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-03 03:35:03,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:03,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:35:03,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:03,417 INFO L390 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 7 [2022-11-03 03:35:03,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:35:03,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 9 [2022-11-03 03:35:03,938 INFO L356 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2022-11-03 03:35:03,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 34 [2022-11-03 03:35:03,995 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 03:35:03,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:08,151 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:35:08,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084178707] [2022-11-03 03:35:08,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084178707] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:35:08,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [11377504] [2022-11-03 03:35:08,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:08,152 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:35:08,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:35:08,153 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:35:08,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (78)] Waiting until timeout for monitored process [2022-11-03 03:35:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:09,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:35:09,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:09,407 INFO L390 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 7 [2022-11-03 03:35:11,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:11,832 INFO L356 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2022-11-03 03:35:11,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 31 [2022-11-03 03:35:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:35:11,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:35:11,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [11377504] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:35:11,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:35:11,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 10 [2022-11-03 03:35:11,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948242000] [2022-11-03 03:35:11,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:35:11,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:35:11,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:35:11,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:35:11,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=94, Unknown=3, NotChecked=0, Total=132 [2022-11-03 03:35:11,849 INFO L87 Difference]: Start difference. First operand 415 states and 491 transitions. Second operand has 7 states, 6 states have (on average 7.666666666666667) internal successors, (46), 7 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:35:12,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:12,317 INFO L93 Difference]: Finished difference Result 454 states and 535 transitions. [2022-11-03 03:35:12,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:35:12,318 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.666666666666667) internal successors, (46), 7 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-11-03 03:35:12,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:12,320 INFO L225 Difference]: With dead ends: 454 [2022-11-03 03:35:12,320 INFO L226 Difference]: Without dead ends: 454 [2022-11-03 03:35:12,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=35, Invalid=94, Unknown=3, NotChecked=0, Total=132 [2022-11-03 03:35:12,321 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 69 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:12,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 435 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 135 Invalid, 0 Unknown, 204 Unchecked, 0.5s Time] [2022-11-03 03:35:12,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-11-03 03:35:12,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 414. [2022-11-03 03:35:12,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 366 states have (on average 1.2459016393442623) internal successors, (456), 390 states have internal predecessors, (456), 6 states have call successors, (6), 3 states have call predecessors, (6), 10 states have return successors, (28), 20 states have call predecessors, (28), 6 states have call successors, (28) [2022-11-03 03:35:12,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 490 transitions. [2022-11-03 03:35:12,329 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 490 transitions. Word has length 58 [2022-11-03 03:35:12,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:12,329 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 490 transitions. [2022-11-03 03:35:12,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.666666666666667) internal successors, (46), 7 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:35:12,329 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 490 transitions. [2022-11-03 03:35:12,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-03 03:35:12,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:12,330 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:12,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (78)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:12,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:12,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:35:12,744 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:35:12,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:12,745 INFO L85 PathProgramCache]: Analyzing trace with hash 848375861, now seen corresponding path program 1 times [2022-11-03 03:35:12,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:35:12,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1368165164] [2022-11-03 03:35:12,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:12,745 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:35:12,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:35:12,746 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:35:12,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-03 03:35:13,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:13,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:35:13,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:13,437 INFO L390 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 7 [2022-11-03 03:35:13,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:35:13,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 9 [2022-11-03 03:35:13,888 INFO L356 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2022-11-03 03:35:13,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 34 [2022-11-03 03:35:13,971 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:35:13,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:18,153 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:35:18,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1368165164] [2022-11-03 03:35:18,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1368165164] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:35:18,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [113845691] [2022-11-03 03:35:18,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:18,153 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:35:18,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:35:18,154 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:35:18,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (80)] Waiting until timeout for monitored process [2022-11-03 03:35:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:19,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:35:19,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:19,633 INFO L390 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 7 treesize of output 5 [2022-11-03 03:35:20,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:20,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:20,592 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:35:20,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 31 [2022-11-03 03:35:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:35:20,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:35:20,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [113845691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:35:20,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:35:20,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2022-11-03 03:35:20,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183160405] [2022-11-03 03:35:20,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:35:20,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:35:20,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:35:20,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:35:20,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=170, Unknown=2, NotChecked=0, Total=210 [2022-11-03 03:35:20,694 INFO L87 Difference]: Start difference. First operand 414 states and 490 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 8 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:35:21,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:21,108 INFO L93 Difference]: Finished difference Result 442 states and 519 transitions. [2022-11-03 03:35:21,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:35:21,109 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 8 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-11-03 03:35:21,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:21,111 INFO L225 Difference]: With dead ends: 442 [2022-11-03 03:35:21,111 INFO L226 Difference]: Without dead ends: 442 [2022-11-03 03:35:21,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=50, Invalid=220, Unknown=2, NotChecked=0, Total=272 [2022-11-03 03:35:21,112 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 12 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:21,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 529 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 144 Unchecked, 0.3s Time] [2022-11-03 03:35:21,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-11-03 03:35:21,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 435. [2022-11-03 03:35:21,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 386 states have (on average 1.2409326424870466) internal successors, (479), 411 states have internal predecessors, (479), 6 states have call successors, (6), 3 states have call predecessors, (6), 11 states have return successors, (25), 20 states have call predecessors, (25), 6 states have call successors, (25) [2022-11-03 03:35:21,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 510 transitions. [2022-11-03 03:35:21,122 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 510 transitions. Word has length 58 [2022-11-03 03:35:21,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:21,122 INFO L495 AbstractCegarLoop]: Abstraction has 435 states and 510 transitions. [2022-11-03 03:35:21,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 8 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:35:21,123 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 510 transitions. [2022-11-03 03:35:21,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-03 03:35:21,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:21,124 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:21,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (80)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:21,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Ended with exit code 0 [2022-11-03 03:35:21,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:35:21,535 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:35:21,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:21,536 INFO L85 PathProgramCache]: Analyzing trace with hash 848375862, now seen corresponding path program 1 times [2022-11-03 03:35:21,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:35:21,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586283547] [2022-11-03 03:35:21,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:21,536 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:35:21,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:35:21,537 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:35:21,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-03 03:35:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:22,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:35:22,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:22,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:35:22,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 9 [2022-11-03 03:35:22,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:22,973 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 03:35:22,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 29 [2022-11-03 03:35:22,995 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 03:35:22,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 03:35:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:35:23,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:23,470 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:35:23,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586283547] [2022-11-03 03:35:23,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586283547] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:35:23,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [654580968] [2022-11-03 03:35:23,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:23,471 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:35:23,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:35:23,472 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:35:23,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2022-11-03 03:35:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:24,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:35:24,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:24,768 INFO L390 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 [2022-11-03 03:35:24,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:24,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 03:35:25,151 INFO L390 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 13 treesize of output 9 [2022-11-03 03:35:26,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:26,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:26,464 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:35:26,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 28 [2022-11-03 03:35:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:35:26,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:35:26,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [654580968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:35:26,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:35:26,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2022-11-03 03:35:26,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968103526] [2022-11-03 03:35:26,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:35:26,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:35:26,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:35:26,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:35:26,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:35:26,687 INFO L87 Difference]: Start difference. First operand 435 states and 510 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 8 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:35:27,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:27,775 INFO L93 Difference]: Finished difference Result 436 states and 509 transitions. [2022-11-03 03:35:27,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:35:27,776 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 8 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-11-03 03:35:27,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:27,777 INFO L225 Difference]: With dead ends: 436 [2022-11-03 03:35:27,777 INFO L226 Difference]: Without dead ends: 436 [2022-11-03 03:35:27,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:35:27,778 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 14 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:27,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 519 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 160 Invalid, 0 Unknown, 110 Unchecked, 0.9s Time] [2022-11-03 03:35:27,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-11-03 03:35:27,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 426. [2022-11-03 03:35:27,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 378 states have (on average 1.2407407407407407) internal successors, (469), 403 states have internal predecessors, (469), 6 states have call successors, (6), 3 states have call predecessors, (6), 10 states have return successors, (24), 19 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-03 03:35:27,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 499 transitions. [2022-11-03 03:35:27,786 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 499 transitions. Word has length 58 [2022-11-03 03:35:27,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:27,787 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 499 transitions. [2022-11-03 03:35:27,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 8 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:35:27,787 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 499 transitions. [2022-11-03 03:35:27,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-03 03:35:27,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:27,788 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:27,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:28,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (82)] Ended with exit code 0 [2022-11-03 03:35:28,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:35:28,203 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:35:28,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:28,204 INFO L85 PathProgramCache]: Analyzing trace with hash -2094859879, now seen corresponding path program 1 times [2022-11-03 03:35:28,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:35:28,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625401158] [2022-11-03 03:35:28,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:28,205 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:35:28,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:35:28,206 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:35:28,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-03 03:35:29,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:29,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:35:29,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:29,239 INFO L390 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 7 [2022-11-03 03:35:30,048 INFO L356 Elim1Store]: treesize reduction 123, result has 21.7 percent of original size [2022-11-03 03:35:30,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 34 treesize of output 56 [2022-11-03 03:35:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:35:30,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:34,292 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:35:34,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625401158] [2022-11-03 03:35:34,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625401158] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:35:34,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [238868724] [2022-11-03 03:35:34,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:34,293 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:35:34,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:35:34,294 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:35:34,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (84)] Waiting until timeout for monitored process [2022-11-03 03:35:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:35,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:35:35,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:35,994 INFO L390 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 7 [2022-11-03 03:35:46,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:46,546 INFO L356 Elim1Store]: treesize reduction 91, result has 27.2 percent of original size [2022-11-03 03:35:46,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 53 [2022-11-03 03:35:46,571 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 1 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:35:46,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:35:50,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [238868724] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:35:50,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:35:50,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 7] total 15 [2022-11-03 03:35:50,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104274109] [2022-11-03 03:35:50,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:35:50,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:35:50,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:35:50,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:35:50,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=191, Unknown=7, NotChecked=0, Total=272 [2022-11-03 03:35:50,913 INFO L87 Difference]: Start difference. First operand 426 states and 499 transitions. Second operand has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:35:51,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:51,162 INFO L93 Difference]: Finished difference Result 469 states and 548 transitions. [2022-11-03 03:35:51,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:35:51,163 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-11-03 03:35:51,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:51,166 INFO L225 Difference]: With dead ends: 469 [2022-11-03 03:35:51,166 INFO L226 Difference]: Without dead ends: 469 [2022-11-03 03:35:51,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 158 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=74, Invalid=191, Unknown=7, NotChecked=0, Total=272 [2022-11-03 03:35:51,167 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 74 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:51,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 282 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 127 Unchecked, 0.2s Time] [2022-11-03 03:35:51,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-11-03 03:35:51,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 432. [2022-11-03 03:35:51,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 384 states have (on average 1.2421875) internal successors, (477), 409 states have internal predecessors, (477), 6 states have call successors, (6), 3 states have call predecessors, (6), 10 states have return successors, (24), 19 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-03 03:35:51,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 507 transitions. [2022-11-03 03:35:51,176 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 507 transitions. Word has length 59 [2022-11-03 03:35:51,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:51,177 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 507 transitions. [2022-11-03 03:35:51,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:35:51,177 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 507 transitions. [2022-11-03 03:35:51,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-03 03:35:51,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:51,178 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:51,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:51,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (84)] Ended with exit code 0 [2022-11-03 03:35:51,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:35:51,596 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:35:51,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:51,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2094859878, now seen corresponding path program 1 times [2022-11-03 03:35:51,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:35:51,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799526182] [2022-11-03 03:35:51,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:51,597 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:35:51,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:35:51,598 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:35:51,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-03 03:35:52,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:52,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 03:35:52,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:52,663 INFO L390 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 [2022-11-03 03:35:52,671 INFO L390 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 7 [2022-11-03 03:35:56,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:56,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:56,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:56,299 INFO L356 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-03 03:35:56,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 36 [2022-11-03 03:35:56,361 INFO L356 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-03 03:35:56,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-11-03 03:35:56,506 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:35:56,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:58,944 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:35:58,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799526182] [2022-11-03 03:35:58,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799526182] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:35:58,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [296675594] [2022-11-03 03:35:58,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:58,944 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:35:58,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:35:58,945 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:35:58,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (86)] Waiting until timeout for monitored process [2022-11-03 03:36:00,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:36:00,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 03:36:00,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:36:00,878 INFO L390 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 [2022-11-03 03:36:00,888 INFO L390 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 7 [2022-11-03 03:36:01,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:01,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:01,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:01,991 INFO L356 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-03 03:36:01,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 36 [2022-11-03 03:36:02,050 INFO L356 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-03 03:36:02,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-11-03 03:36:02,076 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:36:02,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:36:06,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [296675594] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:36:06,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997387335] [2022-11-03 03:36:06,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:36:06,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:36:06,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:36:06,568 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:36:06,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-11-03 03:36:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:36:07,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 03:36:07,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:36:07,586 INFO L390 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 [2022-11-03 03:36:07,597 INFO L390 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 7 [2022-11-03 03:36:07,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:36:08,233 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:36:08,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 43 [2022-11-03 03:36:08,352 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:36:08,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 43 [2022-11-03 03:36:08,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 30 treesize of output 18 [2022-11-03 03:36:11,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:11,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:11,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:11,164 INFO L356 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-03 03:36:11,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 36 [2022-11-03 03:36:11,223 INFO L356 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-03 03:36:11,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-11-03 03:36:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:36:11,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:36:21,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997387335] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:36:21,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:36:21,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 12 [2022-11-03 03:36:21,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925993831] [2022-11-03 03:36:21,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:36:21,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 03:36:21,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:36:21,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 03:36:21,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=222, Unknown=6, NotChecked=0, Total=272 [2022-11-03 03:36:21,614 INFO L87 Difference]: Start difference. First operand 432 states and 507 transitions. Second operand has 13 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:36:22,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:36:22,339 INFO L93 Difference]: Finished difference Result 534 states and 627 transitions. [2022-11-03 03:36:22,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 03:36:22,340 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-11-03 03:36:22,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:36:22,342 INFO L225 Difference]: With dead ends: 534 [2022-11-03 03:36:22,342 INFO L226 Difference]: Without dead ends: 534 [2022-11-03 03:36:22,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=52, Invalid=248, Unknown=6, NotChecked=0, Total=306 [2022-11-03 03:36:22,343 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 68 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 324 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:36:22,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 813 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 221 Invalid, 0 Unknown, 324 Unchecked, 0.7s Time] [2022-11-03 03:36:22,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-11-03 03:36:22,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 447. [2022-11-03 03:36:22,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 398 states have (on average 1.236180904522613) internal successors, (492), 423 states have internal predecessors, (492), 6 states have call successors, (6), 3 states have call predecessors, (6), 11 states have return successors, (28), 20 states have call predecessors, (28), 6 states have call successors, (28) [2022-11-03 03:36:22,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 526 transitions. [2022-11-03 03:36:22,355 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 526 transitions. Word has length 59 [2022-11-03 03:36:22,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:36:22,355 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 526 transitions. [2022-11-03 03:36:22,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:36:22,356 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 526 transitions. [2022-11-03 03:36:22,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 03:36:22,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:36:22,357 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:36:22,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (86)] Ended with exit code 0 [2022-11-03 03:36:22,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (85)] Forceful destruction successful, exit code 0 [2022-11-03 03:36:22,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-11-03 03:36:22,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:36:22,963 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:36:22,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:36:22,964 INFO L85 PathProgramCache]: Analyzing trace with hash 825038592, now seen corresponding path program 1 times [2022-11-03 03:36:22,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:36:22,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [872590322] [2022-11-03 03:36:22,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:36:22,964 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:36:22,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:36:22,965 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:36:22,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-03 03:36:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:36:23,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:36:23,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:36:23,825 INFO L390 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 7 [2022-11-03 03:36:23,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:36:23,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 9 [2022-11-03 03:36:24,407 INFO L356 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2022-11-03 03:36:24,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 38 [2022-11-03 03:36:24,422 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 03:36:24,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:36:26,586 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:36:26,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [872590322] [2022-11-03 03:36:26,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [872590322] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:36:26,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [652642572] [2022-11-03 03:36:26,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:36:26,587 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:36:26,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:36:26,588 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:36:26,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (89)] Waiting until timeout for monitored process [2022-11-03 03:36:28,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:36:28,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:36:28,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:36:28,103 INFO L390 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 7 [2022-11-03 03:36:32,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:32,654 INFO L356 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2022-11-03 03:36:32,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 31 [2022-11-03 03:36:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:36:32,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:36:32,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [652642572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:36:32,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:36:32,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2022-11-03 03:36:32,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787689696] [2022-11-03 03:36:32,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:36:32,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:36:32,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:36:32,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:36:32,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=78, Unknown=3, NotChecked=0, Total=110 [2022-11-03 03:36:32,674 INFO L87 Difference]: Start difference. First operand 447 states and 526 transitions. Second operand has 7 states, 6 states have (on average 8.0) internal successors, (48), 7 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:36:33,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:36:33,154 INFO L93 Difference]: Finished difference Result 488 states and 567 transitions. [2022-11-03 03:36:33,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:36:33,155 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.0) internal successors, (48), 7 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-11-03 03:36:33,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:36:33,157 INFO L225 Difference]: With dead ends: 488 [2022-11-03 03:36:33,158 INFO L226 Difference]: Without dead ends: 488 [2022-11-03 03:36:33,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=29, Invalid=78, Unknown=3, NotChecked=0, Total=110 [2022-11-03 03:36:33,159 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 75 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:36:33,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 434 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 135 Invalid, 0 Unknown, 254 Unchecked, 0.5s Time] [2022-11-03 03:36:33,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-11-03 03:36:33,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 431. [2022-11-03 03:36:33,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 384 states have (on average 1.2291666666666667) internal successors, (472), 411 states have internal predecessors, (472), 6 states have call successors, (6), 3 states have call predecessors, (6), 9 states have return successors, (24), 16 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-03 03:36:33,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 502 transitions. [2022-11-03 03:36:33,169 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 502 transitions. Word has length 60 [2022-11-03 03:36:33,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:36:33,169 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 502 transitions. [2022-11-03 03:36:33,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.0) internal successors, (48), 7 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:36:33,170 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 502 transitions. [2022-11-03 03:36:33,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 03:36:33,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:36:33,171 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:36:33,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (88)] Forceful destruction successful, exit code 0 [2022-11-03 03:36:33,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (89)] Ended with exit code 0 [2022-11-03 03:36:33,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:36:33,587 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:36:33,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:36:33,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1179322216, now seen corresponding path program 1 times [2022-11-03 03:36:33,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:36:33,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [435076121] [2022-11-03 03:36:33,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:36:33,588 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:36:33,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:36:33,589 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:36:33,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-03 03:36:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:36:34,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 03:36:34,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:36:34,650 INFO L390 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 7 [2022-11-03 03:36:34,719 INFO L390 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 7 treesize of output 5 [2022-11-03 03:36:34,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:36:35,096 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:36:35,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 42 [2022-11-03 03:36:35,102 INFO L390 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 28 treesize of output 16 [2022-11-03 03:36:35,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 24 [2022-11-03 03:36:36,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:36,475 INFO L356 Elim1Store]: treesize reduction 82, result has 29.3 percent of original size [2022-11-03 03:36:36,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 49 [2022-11-03 03:36:36,740 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:36:36,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:36:39,193 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:36:39,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [435076121] [2022-11-03 03:36:39,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [435076121] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:36:39,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1676704648] [2022-11-03 03:36:39,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:36:39,194 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:36:39,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:36:39,195 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:36:39,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (91)] Waiting until timeout for monitored process [2022-11-03 03:36:41,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:36:41,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:36:41,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:36:41,519 INFO L390 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 7 treesize of output 5 [2022-11-03 03:36:42,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:42,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:42,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:42,961 INFO L356 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-03 03:36:42,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 45 [2022-11-03 03:36:43,092 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:36:43,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:36:45,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1676704648] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:36:45,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513870085] [2022-11-03 03:36:45,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:36:45,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:36:45,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:36:45,430 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:36:45,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-11-03 03:36:46,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:36:46,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 03:36:46,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:36:46,281 INFO L390 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 7 [2022-11-03 03:36:46,367 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:36:46,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 24 [2022-11-03 03:36:46,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:36:46,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 30 treesize of output 18 [2022-11-03 03:36:50,098 INFO L356 Elim1Store]: treesize reduction 123, result has 21.7 percent of original size [2022-11-03 03:36:50,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 34 treesize of output 56 [2022-11-03 03:36:50,274 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:36:50,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:36:59,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513870085] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:36:59,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:36:59,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 10] total 23 [2022-11-03 03:36:59,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221262861] [2022-11-03 03:36:59,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:36:59,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 03:36:59,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:36:59,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 03:36:59,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=615, Unknown=7, NotChecked=0, Total=702 [2022-11-03 03:36:59,519 INFO L87 Difference]: Start difference. First operand 431 states and 502 transitions. Second operand has 24 states, 23 states have (on average 6.3478260869565215) internal successors, (146), 24 states have internal predecessors, (146), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 03:37:18,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:18,552 INFO L93 Difference]: Finished difference Result 501 states and 586 transitions. [2022-11-03 03:37:18,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 03:37:18,553 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 6.3478260869565215) internal successors, (146), 24 states have internal predecessors, (146), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2022-11-03 03:37:18,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:18,555 INFO L225 Difference]: With dead ends: 501 [2022-11-03 03:37:18,555 INFO L226 Difference]: Without dead ends: 501 [2022-11-03 03:37:18,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 168 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 35.9s TimeCoverageRelationStatistics Valid=173, Invalid=1149, Unknown=10, NotChecked=0, Total=1332 [2022-11-03 03:37:18,556 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 180 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 555 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:18,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 1213 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 279 Invalid, 0 Unknown, 555 Unchecked, 0.6s Time] [2022-11-03 03:37:18,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-11-03 03:37:18,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 438. [2022-11-03 03:37:18,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 390 states have (on average 1.2282051282051283) internal successors, (479), 417 states have internal predecessors, (479), 6 states have call successors, (6), 3 states have call predecessors, (6), 10 states have return successors, (24), 17 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-03 03:37:18,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 509 transitions. [2022-11-03 03:37:18,564 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 509 transitions. Word has length 61 [2022-11-03 03:37:18,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:18,565 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 509 transitions. [2022-11-03 03:37:18,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 6.3478260869565215) internal successors, (146), 24 states have internal predecessors, (146), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 03:37:18,565 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 509 transitions. [2022-11-03 03:37:18,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 03:37:18,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:18,566 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:37:18,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (91)] Ended with exit code 0 [2022-11-03 03:37:18,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (90)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:19,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:19,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:37:19,179 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:37:19,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:19,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1179322217, now seen corresponding path program 1 times [2022-11-03 03:37:19,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:37:19,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1427539546] [2022-11-03 03:37:19,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:19,181 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:37:19,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:37:19,181 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:37:19,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-11-03 03:37:20,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:20,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 03:37:20,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:20,427 INFO L390 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 7 treesize of output 5 [2022-11-03 03:37:20,432 INFO L390 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 5 treesize of output 3 [2022-11-03 03:37:20,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:37:20,963 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:37:20,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 50 [2022-11-03 03:37:21,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 39 treesize of output 21 [2022-11-03 03:37:22,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:22,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:22,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:22,617 INFO L356 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-03 03:37:22,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 38 [2022-11-03 03:37:22,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:22,677 INFO L356 Elim1Store]: treesize reduction 17, result has 19.0 percent of original size [2022-11-03 03:37:22,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 20 [2022-11-03 03:37:22,931 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:37:22,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:37:23,945 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:37:23,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1427539546] [2022-11-03 03:37:23,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1427539546] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:37:23,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [382365501] [2022-11-03 03:37:23,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:23,945 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:37:23,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:37:23,947 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:37:23,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (94)] Waiting until timeout for monitored process [2022-11-03 03:37:25,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:25,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:37:25,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:26,006 INFO L390 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 [2022-11-03 03:37:26,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:26,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 03:37:26,506 INFO L390 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 13 treesize of output 9 [2022-11-03 03:37:32,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:32,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:32,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:32,530 INFO L356 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-03 03:37:32,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 40 [2022-11-03 03:37:32,768 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:37:32,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:37:41,398 WARN L234 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:37:41,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [382365501] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:37:41,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392527940] [2022-11-03 03:37:41,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:41,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:37:41,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:37:41,400 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:37:41,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-11-03 03:37:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:42,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-03 03:37:42,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:42,298 INFO L390 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 7 [2022-11-03 03:37:42,309 INFO L390 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 [2022-11-03 03:37:42,434 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:37:42,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-03 03:37:42,475 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:37:42,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-03 03:37:43,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:37:43,610 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:37:43,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 56 [2022-11-03 03:37:43,751 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:37:43,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 56 [2022-11-03 03:37:43,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 45 treesize of output 27 [2022-11-03 03:38:05,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:05,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:05,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:05,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:05,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:05,393 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:38:05,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-03 03:38:05,560 INFO L356 Elim1Store]: treesize reduction 61, result has 33.0 percent of original size [2022-11-03 03:38:05,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 63 treesize of output 82 [2022-11-03 03:38:05,734 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:38:05,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:38:23,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392527940] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:38:23,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:38:23,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 11] total 28 [2022-11-03 03:38:23,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940349385] [2022-11-03 03:38:23,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:38:23,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-03 03:38:23,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:38:23,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-03 03:38:23,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=947, Unknown=12, NotChecked=0, Total=1056 [2022-11-03 03:38:23,581 INFO L87 Difference]: Start difference. First operand 438 states and 509 transitions. Second operand has 29 states, 28 states have (on average 5.535714285714286) internal successors, (155), 29 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 03:38:59,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:38:59,580 INFO L93 Difference]: Finished difference Result 471 states and 546 transitions. [2022-11-03 03:38:59,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 03:38:59,581 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 5.535714285714286) internal successors, (155), 29 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 61 [2022-11-03 03:38:59,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:38:59,582 INFO L225 Difference]: With dead ends: 471 [2022-11-03 03:38:59,582 INFO L226 Difference]: Without dead ends: 471 [2022-11-03 03:38:59,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 88.2s TimeCoverageRelationStatistics Valid=210, Invalid=1746, Unknown=24, NotChecked=0, Total=1980 [2022-11-03 03:38:59,583 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 66 mSDsluCounter, 1562 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1678 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 633 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:38:59,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 1678 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 411 Invalid, 0 Unknown, 633 Unchecked, 1.1s Time] [2022-11-03 03:38:59,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-11-03 03:38:59,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 421. [2022-11-03 03:38:59,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 374 states have (on average 1.232620320855615) internal successors, (461), 400 states have internal predecessors, (461), 6 states have call successors, (6), 3 states have call predecessors, (6), 9 states have return successors, (23), 17 states have call predecessors, (23), 6 states have call successors, (23) [2022-11-03 03:38:59,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 490 transitions. [2022-11-03 03:38:59,593 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 490 transitions. Word has length 61 [2022-11-03 03:38:59,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:38:59,593 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 490 transitions. [2022-11-03 03:38:59,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 5.535714285714286) internal successors, (155), 29 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 03:38:59,594 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 490 transitions. [2022-11-03 03:38:59,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 03:38:59,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:38:59,595 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:38:59,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (93)] Forceful destruction successful, exit code 0 [2022-11-03 03:38:59,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (94)] Ended with exit code 0 [2022-11-03 03:39:00,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-11-03 03:39:00,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:39:00,218 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:39:00,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:00,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1611932791, now seen corresponding path program 1 times [2022-11-03 03:39:00,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:39:00,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066258715] [2022-11-03 03:39:00,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:00,219 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:39:00,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:39:00,220 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:39:00,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2022-11-03 03:39:01,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:01,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 03:39:01,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:01,193 INFO L390 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 [2022-11-03 03:39:01,217 INFO L390 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 7 [2022-11-03 03:39:01,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:39:01,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 9 [2022-11-03 03:39:01,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:01,973 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 03:39:01,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 27 [2022-11-03 03:39:02,002 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 03:39:02,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 03:39:02,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:39:02,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:39:02,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 33 treesize of output 21 [2022-11-03 03:39:02,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-03 03:39:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:39:02,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:39:03,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 40 treesize of output 32 [2022-11-03 03:39:03,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:03,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:03,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:03,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:06,051 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:39:06,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2066258715] [2022-11-03 03:39:06,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2066258715] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:39:06,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1845429834] [2022-11-03 03:39:06,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:06,051 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:39:06,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:39:06,052 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:39:06,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (97)] Waiting until timeout for monitored process [2022-11-03 03:39:08,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:08,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 03:39:08,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:08,145 INFO L390 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 [2022-11-03 03:39:08,155 INFO L390 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 7 [2022-11-03 03:39:08,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:08,905 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 03:39:08,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 27 [2022-11-03 03:39:08,933 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 03:39:08,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 03:39:09,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:39:09,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:39:09,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 33 treesize of output 21 [2022-11-03 03:39:09,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-03 03:39:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:39:09,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:39:09,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1845429834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:09,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:39:09,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 14 [2022-11-03 03:39:09,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129228431] [2022-11-03 03:39:09,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:09,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:39:09,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:39:09,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:39:09,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:39:09,830 INFO L87 Difference]: Start difference. First operand 421 states and 490 transitions. Second operand has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:39:10,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:10,506 INFO L93 Difference]: Finished difference Result 514 states and 615 transitions. [2022-11-03 03:39:10,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 03:39:10,507 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-11-03 03:39:10,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:10,509 INFO L225 Difference]: With dead ends: 514 [2022-11-03 03:39:10,510 INFO L226 Difference]: Without dead ends: 514 [2022-11-03 03:39:10,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:39:10,511 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 42 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:10,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 592 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 154 Invalid, 0 Unknown, 239 Unchecked, 0.7s Time] [2022-11-03 03:39:10,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-11-03 03:39:10,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 489. [2022-11-03 03:39:10,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 438 states have (on average 1.2283105022831051) internal successors, (538), 465 states have internal predecessors, (538), 8 states have call successors, (8), 3 states have call predecessors, (8), 11 states have return successors, (39), 20 states have call predecessors, (39), 8 states have call successors, (39) [2022-11-03 03:39:10,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 585 transitions. [2022-11-03 03:39:10,522 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 585 transitions. Word has length 61 [2022-11-03 03:39:10,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:10,523 INFO L495 AbstractCegarLoop]: Abstraction has 489 states and 585 transitions. [2022-11-03 03:39:10,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:39:10,523 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 585 transitions. [2022-11-03 03:39:10,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-03 03:39:10,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:10,524 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:10,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (97)] Forceful destruction successful, exit code 0 [2022-11-03 03:39:10,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (96)] Forceful destruction successful, exit code 0 [2022-11-03 03:39:10,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:39:10,948 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:39:10,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:10,948 INFO L85 PathProgramCache]: Analyzing trace with hash 939726753, now seen corresponding path program 1 times [2022-11-03 03:39:10,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:39:10,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412656162] [2022-11-03 03:39:10,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:10,949 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:39:10,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:39:10,950 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:39:10,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2022-11-03 03:39:11,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:11,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:39:11,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:11,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:39:11,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 11 [2022-11-03 03:39:12,006 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:39:12,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:39:12,006 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:39:12,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412656162] [2022-11-03 03:39:12,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412656162] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:12,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:39:12,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:39:12,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028272198] [2022-11-03 03:39:12,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:12,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:39:12,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:39:12,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:39:12,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:39:12,008 INFO L87 Difference]: Start difference. First operand 489 states and 585 transitions. Second operand has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:39:12,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:12,865 INFO L93 Difference]: Finished difference Result 504 states and 599 transitions. [2022-11-03 03:39:12,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:39:12,866 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-11-03 03:39:12,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:12,869 INFO L225 Difference]: With dead ends: 504 [2022-11-03 03:39:12,869 INFO L226 Difference]: Without dead ends: 504 [2022-11-03 03:39:12,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:39:12,870 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 172 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:12,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 305 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 03:39:12,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-11-03 03:39:12,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 492. [2022-11-03 03:39:12,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 441 states have (on average 1.2290249433106577) internal successors, (542), 468 states have internal predecessors, (542), 8 states have call successors, (8), 3 states have call predecessors, (8), 11 states have return successors, (39), 20 states have call predecessors, (39), 8 states have call successors, (39) [2022-11-03 03:39:12,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 589 transitions. [2022-11-03 03:39:12,880 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 589 transitions. Word has length 64 [2022-11-03 03:39:12,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:12,880 INFO L495 AbstractCegarLoop]: Abstraction has 492 states and 589 transitions. [2022-11-03 03:39:12,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:39:12,880 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 589 transitions. [2022-11-03 03:39:12,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-03 03:39:12,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:12,881 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:12,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (98)] Ended with exit code 0 [2022-11-03 03:39:13,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:39:13,082 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:39:13,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:13,082 INFO L85 PathProgramCache]: Analyzing trace with hash 939726754, now seen corresponding path program 1 times [2022-11-03 03:39:13,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:39:13,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1178077723] [2022-11-03 03:39:13,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:13,083 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:39:13,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:39:13,084 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:39:13,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2022-11-03 03:39:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:13,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:39:13,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:14,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:39:14,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:39:14,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 9 [2022-11-03 03:39:14,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-03 03:39:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:39:14,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:39:14,370 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:39:14,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1178077723] [2022-11-03 03:39:14,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1178077723] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:14,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:39:14,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:39:14,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010151246] [2022-11-03 03:39:14,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:14,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:39:14,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:39:14,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:39:14,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:39:14,372 INFO L87 Difference]: Start difference. First operand 492 states and 589 transitions. Second operand has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:39:15,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:15,535 INFO L93 Difference]: Finished difference Result 520 states and 615 transitions. [2022-11-03 03:39:15,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:39:15,536 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-11-03 03:39:15,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:15,538 INFO L225 Difference]: With dead ends: 520 [2022-11-03 03:39:15,538 INFO L226 Difference]: Without dead ends: 520 [2022-11-03 03:39:15,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:39:15,539 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 159 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:15,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 333 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 03:39:15,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-11-03 03:39:15,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 492. [2022-11-03 03:39:15,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 441 states have (on average 1.2267573696145124) internal successors, (541), 468 states have internal predecessors, (541), 8 states have call successors, (8), 3 states have call predecessors, (8), 11 states have return successors, (39), 20 states have call predecessors, (39), 8 states have call successors, (39) [2022-11-03 03:39:15,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 588 transitions. [2022-11-03 03:39:15,548 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 588 transitions. Word has length 64 [2022-11-03 03:39:15,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:15,549 INFO L495 AbstractCegarLoop]: Abstraction has 492 states and 588 transitions. [2022-11-03 03:39:15,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:39:15,549 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 588 transitions. [2022-11-03 03:39:15,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 03:39:15,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:15,550 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:15,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (99)] Ended with exit code 0 [2022-11-03 03:39:15,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:39:15,767 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:39:15,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:15,767 INFO L85 PathProgramCache]: Analyzing trace with hash 504851823, now seen corresponding path program 1 times [2022-11-03 03:39:15,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:39:15,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446837668] [2022-11-03 03:39:15,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:15,768 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:39:15,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:39:15,769 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:39:15,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-11-03 03:39:16,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:16,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 03:39:16,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:16,766 INFO L390 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 [2022-11-03 03:39:16,781 INFO L390 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 7 [2022-11-03 03:39:17,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:39:17,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 9 [2022-11-03 03:39:17,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:17,610 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 03:39:17,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 27 [2022-11-03 03:39:17,646 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 03:39:17,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 03:39:17,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:39:17,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:39:18,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 33 treesize of output 21 [2022-11-03 03:39:18,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-03 03:39:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:39:18,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:39:18,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 40 treesize of output 32 [2022-11-03 03:39:18,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:18,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:18,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:18,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:31,595 WARN L234 SmtUtils]: Spent 12.31s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:39:31,596 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:39:31,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446837668] [2022-11-03 03:39:31,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446837668] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:39:31,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [692881586] [2022-11-03 03:39:31,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:31,597 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:39:31,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:39:31,598 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:39:31,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (101)] Waiting until timeout for monitored process [2022-11-03 03:39:33,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:33,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 03:39:33,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:33,726 INFO L390 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 7 [2022-11-03 03:39:33,748 INFO L390 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 [2022-11-03 03:39:36,021 WARN L855 $PredicateComparison]: unable to prove that (exists ((create_data_~data~0.base (_ BitVec 32))) (and (= (select |c_old(#valid)| create_data_~data~0.base) (_ bv0 1)) (exists ((v_ArrVal_12197 (_ BitVec 32))) (= |c_#length| (store (store |c_old(#length)| create_data_~data~0.base v_ArrVal_12197) |c_create_data_#t~malloc7.base| (_ bv80 32)))))) is different from true [2022-11-03 03:39:36,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:36,493 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 03:39:36,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 27 [2022-11-03 03:39:36,520 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 03:39:36,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 03:39:36,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:39:36,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:39:37,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 33 treesize of output 21 [2022-11-03 03:39:37,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-03 03:39:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:39:37,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:39:37,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [692881586] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:37,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:39:37,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 15 [2022-11-03 03:39:37,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586733509] [2022-11-03 03:39:37,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:37,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 03:39:37,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:39:37,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 03:39:37,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=287, Unknown=1, NotChecked=34, Total=380 [2022-11-03 03:39:37,413 INFO L87 Difference]: Start difference. First operand 492 states and 588 transitions. Second operand has 11 states, 10 states have (on average 5.3) internal successors, (53), 11 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:39:38,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:38,007 INFO L93 Difference]: Finished difference Result 576 states and 700 transitions. [2022-11-03 03:39:38,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:39:38,008 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.3) internal successors, (53), 11 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-11-03 03:39:38,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:38,011 INFO L225 Difference]: With dead ends: 576 [2022-11-03 03:39:38,011 INFO L226 Difference]: Without dead ends: 576 [2022-11-03 03:39:38,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=58, Invalid=287, Unknown=1, NotChecked=34, Total=380 [2022-11-03 03:39:38,012 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 37 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 411 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:38,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 617 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 130 Invalid, 0 Unknown, 411 Unchecked, 0.6s Time] [2022-11-03 03:39:38,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-11-03 03:39:38,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 483. [2022-11-03 03:39:38,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 433 states have (on average 1.2263279445727482) internal successors, (531), 459 states have internal predecessors, (531), 8 states have call successors, (8), 3 states have call predecessors, (8), 10 states have return successors, (34), 20 states have call predecessors, (34), 8 states have call successors, (34) [2022-11-03 03:39:38,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 573 transitions. [2022-11-03 03:39:38,024 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 573 transitions. Word has length 65 [2022-11-03 03:39:38,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:38,024 INFO L495 AbstractCegarLoop]: Abstraction has 483 states and 573 transitions. [2022-11-03 03:39:38,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.3) internal successors, (53), 11 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:39:38,025 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 573 transitions. [2022-11-03 03:39:38,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 03:39:38,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:38,026 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:38,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Forceful destruction successful, exit code 0 [2022-11-03 03:39:38,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (101)] Ended with exit code 0 [2022-11-03 03:39:38,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:39:38,444 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:39:38,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:38,444 INFO L85 PathProgramCache]: Analyzing trace with hash -665539789, now seen corresponding path program 1 times [2022-11-03 03:39:38,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:39:38,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621755964] [2022-11-03 03:39:38,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:38,445 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:39:38,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:39:38,446 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:39:38,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2022-11-03 03:39:39,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:39,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 03:39:39,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:39,536 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:39:39,536 INFO L390 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 1 case distinctions, treesize of input 9 treesize of output 19 [2022-11-03 03:39:39,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:39:39,724 INFO L356 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-03 03:39:39,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2022-11-03 03:39:39,865 INFO L356 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-03 03:39:39,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 24 [2022-11-03 03:39:39,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 11 [2022-11-03 03:39:40,023 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:39:40,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:39:40,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 32 [2022-11-03 03:39:40,561 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:39:40,561 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:39:40,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621755964] [2022-11-03 03:39:40,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621755964] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:39:40,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1317451273] [2022-11-03 03:39:40,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:40,562 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:39:40,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:39:40,565 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:39:40,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (103)] Waiting until timeout for monitored process [2022-11-03 03:39:42,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:42,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 03:39:42,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:42,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:39:42,886 INFO L356 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-03 03:39:42,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2022-11-03 03:39:43,070 INFO L356 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-03 03:39:43,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 24 [2022-11-03 03:39:43,233 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-03 03:39:43,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 14 [2022-11-03 03:39:43,240 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:39:43,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:39:43,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 32 [2022-11-03 03:39:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:39:43,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1317451273] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:39:43,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065865759] [2022-11-03 03:39:43,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:43,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:39:43,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:39:43,507 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:39:43,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-11-03 03:39:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:44,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:39:44,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:44,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:39:44,484 INFO L356 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-11-03 03:39:44,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 35 [2022-11-03 03:39:44,689 INFO L356 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-03 03:39:44,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 28 [2022-11-03 03:39:44,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 33 treesize of output 15 [2022-11-03 03:39:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:39:44,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:39:44,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 32 [2022-11-03 03:39:45,122 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:39:45,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065865759] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:39:45,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:39:45,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9, 8, 8, 8] total 23 [2022-11-03 03:39:45,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000516241] [2022-11-03 03:39:45,123 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:39:45,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 03:39:45,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:39:45,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 03:39:45,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:39:45,125 INFO L87 Difference]: Start difference. First operand 483 states and 573 transitions. Second operand has 24 states, 23 states have (on average 4.304347826086956) internal successors, (99), 23 states have internal predecessors, (99), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 03:39:48,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:48,218 INFO L93 Difference]: Finished difference Result 704 states and 863 transitions. [2022-11-03 03:39:48,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 03:39:48,219 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.304347826086956) internal successors, (99), 23 states have internal predecessors, (99), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-11-03 03:39:48,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:48,222 INFO L225 Difference]: With dead ends: 704 [2022-11-03 03:39:48,222 INFO L226 Difference]: Without dead ends: 704 [2022-11-03 03:39:48,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 357 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2022-11-03 03:39:48,223 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 437 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:48,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 933 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 717 Invalid, 0 Unknown, 122 Unchecked, 2.3s Time] [2022-11-03 03:39:48,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-11-03 03:39:48,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 529. [2022-11-03 03:39:48,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 479 states have (on average 1.2421711899791232) internal successors, (595), 505 states have internal predecessors, (595), 8 states have call successors, (8), 3 states have call predecessors, (8), 10 states have return successors, (34), 20 states have call predecessors, (34), 8 states have call successors, (34) [2022-11-03 03:39:48,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 637 transitions. [2022-11-03 03:39:48,236 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 637 transitions. Word has length 65 [2022-11-03 03:39:48,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:48,237 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 637 transitions. [2022-11-03 03:39:48,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.304347826086956) internal successors, (99), 23 states have internal predecessors, (99), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 03:39:48,237 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 637 transitions. [2022-11-03 03:39:48,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 03:39:48,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:48,238 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:48,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (103)] Forceful destruction successful, exit code 0 [2022-11-03 03:39:48,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-11-03 03:39:48,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (102)] Ended with exit code 0 [2022-11-03 03:39:48,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:39:48,860 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:39:48,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:48,861 INFO L85 PathProgramCache]: Analyzing trace with hash -665539788, now seen corresponding path program 1 times [2022-11-03 03:39:48,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:39:48,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2122160936] [2022-11-03 03:39:48,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:48,861 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:39:48,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:39:48,862 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:39:48,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2022-11-03 03:39:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:49,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 03:39:49,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:50,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:39:50,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:39:50,251 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:39:50,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2022-11-03 03:39:50,280 INFO L356 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2022-11-03 03:39:50,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-03 03:39:50,419 INFO L356 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-03 03:39:50,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2022-11-03 03:39:50,461 INFO L356 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-03 03:39:50,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2022-11-03 03:39:50,694 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-03 03:39:50,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 10 [2022-11-03 03:39:50,702 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-03 03:39:50,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 16 [2022-11-03 03:39:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:39:50,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:39:52,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 28 [2022-11-03 03:39:52,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 66 treesize of output 62 [2022-11-03 03:39:52,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 102 treesize of output 94 [2022-11-03 03:40:11,616 WARN L234 SmtUtils]: Spent 15.89s on a formula simplification. DAG size of input: 61 DAG size of output: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:40:11,735 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:40:11,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 106 [2022-11-03 03:40:11,894 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:40:11,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 152 [2022-11-03 03:40:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:40:12,807 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:40:12,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2122160936] [2022-11-03 03:40:12,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2122160936] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:40:12,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [384554137] [2022-11-03 03:40:12,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:12,807 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:40:12,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:40:12,810 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:40:12,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (106)] Waiting until timeout for monitored process [2022-11-03 03:40:14,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:14,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 03:40:14,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:40:15,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:40:15,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:40:15,603 INFO L356 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2022-11-03 03:40:15,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-03 03:40:15,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-03 03:40:15,956 INFO L356 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-03 03:40:15,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2022-11-03 03:40:16,001 INFO L356 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-03 03:40:16,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2022-11-03 03:40:16,295 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-03 03:40:16,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 16 [2022-11-03 03:40:16,309 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-03 03:40:16,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 10 [2022-11-03 03:40:16,314 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:40:16,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:40:19,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 28 [2022-11-03 03:40:19,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 66 treesize of output 62 [2022-11-03 03:40:19,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 102 treesize of output 94 [2022-11-03 03:40:36,232 WARN L234 SmtUtils]: Spent 11.41s on a formula simplification. DAG size of input: 61 DAG size of output: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:40:36,425 INFO L356 Elim1Store]: treesize reduction 7, result has 77.4 percent of original size [2022-11-03 03:40:36,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 63 [2022-11-03 03:40:36,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-03 03:40:36,690 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:40:36,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [384554137] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:40:36,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776154717] [2022-11-03 03:40:36,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:36,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:40:36,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:40:36,692 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:40:36,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-11-03 03:40:37,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:37,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 03:40:37,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:40:37,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:40:37,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:40:37,962 INFO L356 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2022-11-03 03:40:37,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-03 03:40:37,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-03 03:40:38,069 INFO L356 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-03 03:40:38,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2022-11-03 03:40:38,119 INFO L356 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-03 03:40:38,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2022-11-03 03:40:38,335 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-03 03:40:38,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 10 [2022-11-03 03:40:38,341 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-03 03:40:38,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 16 [2022-11-03 03:40:38,350 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:40:38,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:40:39,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 28 [2022-11-03 03:40:39,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 66 treesize of output 62 [2022-11-03 03:40:39,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 102 treesize of output 94 [2022-11-03 03:40:45,104 INFO L356 Elim1Store]: treesize reduction 7, result has 77.4 percent of original size [2022-11-03 03:40:45,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 63 [2022-11-03 03:40:45,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-03 03:40:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:40:45,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776154717] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:40:45,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:40:45,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 8, 8, 8] total 23 [2022-11-03 03:40:45,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976168619] [2022-11-03 03:40:45,377 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:40:45,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 03:40:45,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:40:45,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 03:40:45,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=474, Unknown=3, NotChecked=0, Total=552 [2022-11-03 03:40:45,379 INFO L87 Difference]: Start difference. First operand 529 states and 637 transitions. Second operand has 24 states, 23 states have (on average 4.869565217391305) internal successors, (112), 24 states have internal predecessors, (112), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 03:40:50,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:40:50,524 INFO L93 Difference]: Finished difference Result 778 states and 941 transitions. [2022-11-03 03:40:50,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 03:40:50,527 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.869565217391305) internal successors, (112), 24 states have internal predecessors, (112), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 65 [2022-11-03 03:40:50,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:40:50,531 INFO L225 Difference]: With dead ends: 778 [2022-11-03 03:40:50,532 INFO L226 Difference]: Without dead ends: 778 [2022-11-03 03:40:50,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 358 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 45.9s TimeCoverageRelationStatistics Valid=215, Invalid=904, Unknown=3, NotChecked=0, Total=1122 [2022-11-03 03:40:50,532 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 605 mSDsluCounter, 1196 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 1307 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 450 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:40:50,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [605 Valid, 1307 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 663 Invalid, 0 Unknown, 450 Unchecked, 3.5s Time] [2022-11-03 03:40:50,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-11-03 03:40:50,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 529. [2022-11-03 03:40:50,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 479 states have (on average 1.2379958246346556) internal successors, (593), 505 states have internal predecessors, (593), 8 states have call successors, (8), 3 states have call predecessors, (8), 10 states have return successors, (34), 20 states have call predecessors, (34), 8 states have call successors, (34) [2022-11-03 03:40:50,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 635 transitions. [2022-11-03 03:40:50,547 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 635 transitions. Word has length 65 [2022-11-03 03:40:50,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:40:50,547 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 635 transitions. [2022-11-03 03:40:50,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.869565217391305) internal successors, (112), 24 states have internal predecessors, (112), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 03:40:50,548 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 635 transitions. [2022-11-03 03:40:50,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 03:40:50,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:50,549 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:40:50,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-11-03 03:40:50,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (105)] Ended with exit code 0 [2022-11-03 03:40:50,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (106)] Ended with exit code 0 [2022-11-03 03:40:51,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:40:51,167 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:40:51,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:51,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1286364406, now seen corresponding path program 1 times [2022-11-03 03:40:51,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:40:51,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1149238905] [2022-11-03 03:40:51,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:51,169 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:40:51,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:40:51,170 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:40:51,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2022-11-03 03:40:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:52,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 03:40:52,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:40:52,551 INFO L390 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 7 [2022-11-03 03:40:52,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:40:52,874 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:40:52,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-03 03:40:52,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:40:53,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-03 03:40:53,139 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:40:53,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 29 [2022-11-03 03:40:53,192 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:40:53,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:40:53,192 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:40:53,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1149238905] [2022-11-03 03:40:53,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1149238905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:40:53,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:40:53,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-03 03:40:53,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691362476] [2022-11-03 03:40:53,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:40:53,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 03:40:53,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:40:53,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 03:40:53,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:40:53,194 INFO L87 Difference]: Start difference. First operand 529 states and 635 transitions. Second operand has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:40:55,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:40:55,645 INFO L93 Difference]: Finished difference Result 615 states and 723 transitions. [2022-11-03 03:40:55,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 03:40:55,646 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-11-03 03:40:55,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:40:55,647 INFO L225 Difference]: With dead ends: 615 [2022-11-03 03:40:55,647 INFO L226 Difference]: Without dead ends: 615 [2022-11-03 03:40:55,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:40:55,648 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 273 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:40:55,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 821 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 673 Invalid, 0 Unknown, 134 Unchecked, 2.1s Time] [2022-11-03 03:40:55,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-11-03 03:40:55,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 532. [2022-11-03 03:40:55,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 482 states have (on average 1.2385892116182573) internal successors, (597), 508 states have internal predecessors, (597), 8 states have call successors, (8), 3 states have call predecessors, (8), 10 states have return successors, (34), 20 states have call predecessors, (34), 8 states have call successors, (34) [2022-11-03 03:40:55,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 639 transitions. [2022-11-03 03:40:55,660 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 639 transitions. Word has length 65 [2022-11-03 03:40:55,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:40:55,660 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 639 transitions. [2022-11-03 03:40:55,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:40:55,661 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 639 transitions. [2022-11-03 03:40:55,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 03:40:55,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:55,662 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:40:55,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (108)] Forceful destruction successful, exit code 0 [2022-11-03 03:40:55,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:40:55,887 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:40:55,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:55,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1286364405, now seen corresponding path program 1 times [2022-11-03 03:40:55,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:40:55,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1388857073] [2022-11-03 03:40:55,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:55,888 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:40:55,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:40:55,889 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:40:55,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2022-11-03 03:40:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:57,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-03 03:40:57,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:40:57,193 INFO L390 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 7 [2022-11-03 03:40:57,223 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 03:40:57,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 03:40:57,364 INFO L390 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 [2022-11-03 03:40:57,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:40:57,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:40:57,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-03 03:40:57,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 03:40:58,092 INFO L356 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2022-11-03 03:40:58,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 37 [2022-11-03 03:40:58,117 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-03 03:40:58,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-11-03 03:40:58,170 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:40:58,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:40:58,170 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:40:58,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1388857073] [2022-11-03 03:40:58,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1388857073] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:40:58,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:40:58,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-03 03:40:58,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993030764] [2022-11-03 03:40:58,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:40:58,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 03:40:58,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:40:58,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 03:40:58,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:40:58,172 INFO L87 Difference]: Start difference. First operand 532 states and 639 transitions. Second operand has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:41:01,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:41:01,774 INFO L93 Difference]: Finished difference Result 719 states and 841 transitions. [2022-11-03 03:41:01,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 03:41:01,776 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-11-03 03:41:01,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:41:01,779 INFO L225 Difference]: With dead ends: 719 [2022-11-03 03:41:01,779 INFO L226 Difference]: Without dead ends: 719 [2022-11-03 03:41:01,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:41:01,780 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 362 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:41:01,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 881 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 800 Invalid, 0 Unknown, 140 Unchecked, 2.9s Time] [2022-11-03 03:41:01,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-11-03 03:41:01,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 521. [2022-11-03 03:41:01,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 471 states have (on average 1.2399150743099787) internal successors, (584), 496 states have internal predecessors, (584), 8 states have call successors, (8), 3 states have call predecessors, (8), 10 states have return successors, (34), 21 states have call predecessors, (34), 8 states have call successors, (34) [2022-11-03 03:41:01,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 626 transitions. [2022-11-03 03:41:01,793 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 626 transitions. Word has length 65 [2022-11-03 03:41:01,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:41:01,793 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 626 transitions. [2022-11-03 03:41:01,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:41:01,793 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 626 transitions. [2022-11-03 03:41:01,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 03:41:01,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:41:01,795 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:41:01,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (109)] Forceful destruction successful, exit code 0 [2022-11-03 03:41:02,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:41:02,011 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:41:02,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:41:02,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1134284034, now seen corresponding path program 1 times [2022-11-03 03:41:02,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:41:02,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110903540] [2022-11-03 03:41:02,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:41:02,012 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:41:02,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:41:02,014 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:41:02,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2022-11-03 03:41:02,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:41:02,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:41:02,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:41:03,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 19 [2022-11-03 03:41:03,149 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:41:03,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-11-03 03:41:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:41:03,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:41:03,210 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:41:03,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110903540] [2022-11-03 03:41:03,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [110903540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:41:03,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:41:03,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:41:03,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657831039] [2022-11-03 03:41:03,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:41:03,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:41:03,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:41:03,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:41:03,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:41:03,212 INFO L87 Difference]: Start difference. First operand 521 states and 626 transitions. Second operand has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:41:04,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:41:04,666 INFO L93 Difference]: Finished difference Result 542 states and 647 transitions. [2022-11-03 03:41:04,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 03:41:04,667 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-11-03 03:41:04,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:41:04,669 INFO L225 Difference]: With dead ends: 542 [2022-11-03 03:41:04,670 INFO L226 Difference]: Without dead ends: 542 [2022-11-03 03:41:04,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:41:04,670 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 33 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:41:04,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 577 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 317 Invalid, 0 Unknown, 75 Unchecked, 1.3s Time] [2022-11-03 03:41:04,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-11-03 03:41:04,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 534. [2022-11-03 03:41:04,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 484 states have (on average 1.237603305785124) internal successors, (599), 509 states have internal predecessors, (599), 8 states have call successors, (8), 3 states have call predecessors, (8), 10 states have return successors, (34), 21 states have call predecessors, (34), 8 states have call successors, (34) [2022-11-03 03:41:04,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 641 transitions. [2022-11-03 03:41:04,676 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 641 transitions. Word has length 66 [2022-11-03 03:41:04,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:41:04,677 INFO L495 AbstractCegarLoop]: Abstraction has 534 states and 641 transitions. [2022-11-03 03:41:04,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:41:04,677 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 641 transitions. [2022-11-03 03:41:04,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 03:41:04,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:41:04,678 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:41:04,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (110)] Forceful destruction successful, exit code 0 [2022-11-03 03:41:04,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:41:04,891 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:41:04,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:41:04,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1134284035, now seen corresponding path program 1 times [2022-11-03 03:41:04,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:41:04,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926862198] [2022-11-03 03:41:04,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:41:04,892 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:41:04,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:41:04,894 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:41:04,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (111)] Waiting until timeout for monitored process [2022-11-03 03:41:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:41:05,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 03:41:05,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:41:06,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:41:06,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-03 03:41:06,422 INFO L356 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-03 03:41:06,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 03:41:07,232 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:41:07,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 48 [2022-11-03 03:41:07,269 INFO L356 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2022-11-03 03:41:07,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 23 [2022-11-03 03:41:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:41:07,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:41:07,431 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:41:07,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [926862198] [2022-11-03 03:41:07,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [926862198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:41:07,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:41:07,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-03 03:41:07,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098538422] [2022-11-03 03:41:07,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:41:07,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 03:41:07,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:41:07,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 03:41:07,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:41:07,433 INFO L87 Difference]: Start difference. First operand 534 states and 641 transitions. Second operand has 16 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:41:10,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:41:10,851 INFO L93 Difference]: Finished difference Result 691 states and 837 transitions. [2022-11-03 03:41:10,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 03:41:10,853 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-11-03 03:41:10,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:41:10,856 INFO L225 Difference]: With dead ends: 691 [2022-11-03 03:41:10,856 INFO L226 Difference]: Without dead ends: 691 [2022-11-03 03:41:10,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2022-11-03 03:41:10,856 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 224 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:41:10,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 920 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 664 Invalid, 0 Unknown, 109 Unchecked, 2.5s Time] [2022-11-03 03:41:10,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-11-03 03:41:10,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 589. [2022-11-03 03:41:10,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 539 states have (on average 1.2504638218923934) internal successors, (674), 561 states have internal predecessors, (674), 8 states have call successors, (8), 3 states have call predecessors, (8), 10 states have return successors, (34), 24 states have call predecessors, (34), 8 states have call successors, (34) [2022-11-03 03:41:10,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 716 transitions. [2022-11-03 03:41:10,868 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 716 transitions. Word has length 66 [2022-11-03 03:41:10,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:41:10,869 INFO L495 AbstractCegarLoop]: Abstraction has 589 states and 716 transitions. [2022-11-03 03:41:10,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:41:10,869 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 716 transitions. [2022-11-03 03:41:10,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 03:41:10,870 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:41:10,870 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:41:10,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (111)] Forceful destruction successful, exit code 0 [2022-11-03 03:41:11,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:41:11,092 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:41:11,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:41:11,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1667627081, now seen corresponding path program 2 times [2022-11-03 03:41:11,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:41:11,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1749604604] [2022-11-03 03:41:11,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:41:11,093 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:41:11,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:41:11,094 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:41:11,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2022-11-03 03:41:12,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:41:12,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:41:12,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 03:41:12,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:41:12,569 INFO L390 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 7 [2022-11-03 03:41:12,576 INFO L390 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 [2022-11-03 03:41:20,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:20,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:20,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:21,044 INFO L356 Elim1Store]: treesize reduction 83, result has 33.6 percent of original size [2022-11-03 03:41:21,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 50 [2022-11-03 03:41:21,116 INFO L356 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-03 03:41:21,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-11-03 03:41:21,428 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:41:21,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:41:22,076 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:41:22,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1749604604] [2022-11-03 03:41:22,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1749604604] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:41:22,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [276454646] [2022-11-03 03:41:22,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:41:22,077 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:41:22,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:41:22,078 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:41:22,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (113)] Waiting until timeout for monitored process [2022-11-03 03:41:24,089 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:41:24,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43590790] [2022-11-03 03:41:24,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:41:24,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:41:24,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:41:24,091 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:41:24,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-11-03 03:41:24,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (113)] Forceful destruction successful, exit code 1 [2022-11-03 03:41:26,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:41:26,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:41:26,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 03:41:26,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:41:26,536 INFO L390 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 [2022-11-03 03:41:30,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:30,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:30,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:30,300 INFO L356 Elim1Store]: treesize reduction 83, result has 33.6 percent of original size [2022-11-03 03:41:30,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 50 [2022-11-03 03:41:30,372 INFO L356 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-03 03:41:30,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-11-03 03:41:30,449 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:41:30,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:41:34,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43590790] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:41:34,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:41:34,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2022-11-03 03:41:34,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332234186] [2022-11-03 03:41:34,991 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:41:34,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 03:41:34,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:41:34,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 03:41:34,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=144, Unknown=5, NotChecked=0, Total=182 [2022-11-03 03:41:34,992 INFO L87 Difference]: Start difference. First operand 589 states and 716 transitions. Second operand has 11 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:41:35,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:41:35,704 INFO L93 Difference]: Finished difference Result 777 states and 934 transitions. [2022-11-03 03:41:35,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:41:35,704 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-11-03 03:41:35,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:41:35,708 INFO L225 Difference]: With dead ends: 777 [2022-11-03 03:41:35,708 INFO L226 Difference]: Without dead ends: 777 [2022-11-03 03:41:35,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=33, Invalid=144, Unknown=5, NotChecked=0, Total=182 [2022-11-03 03:41:35,709 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 145 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:41:35,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 883 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 191 Invalid, 0 Unknown, 246 Unchecked, 0.7s Time] [2022-11-03 03:41:35,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-11-03 03:41:35,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 634. [2022-11-03 03:41:35,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 583 states have (on average 1.2401372212692967) internal successors, (723), 603 states have internal predecessors, (723), 8 states have call successors, (8), 3 states have call predecessors, (8), 11 states have return successors, (40), 27 states have call predecessors, (40), 8 states have call successors, (40) [2022-11-03 03:41:35,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 771 transitions. [2022-11-03 03:41:35,730 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 771 transitions. Word has length 66 [2022-11-03 03:41:35,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:41:35,731 INFO L495 AbstractCegarLoop]: Abstraction has 634 states and 771 transitions. [2022-11-03 03:41:35,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:41:35,731 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 771 transitions. [2022-11-03 03:41:35,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 03:41:35,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:41:35,732 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:41:35,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-11-03 03:41:35,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (112)] Forceful destruction successful, exit code 0 [2022-11-03 03:41:36,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:41:36,151 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:41:36,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:41:36,152 INFO L85 PathProgramCache]: Analyzing trace with hash -747494557, now seen corresponding path program 1 times [2022-11-03 03:41:36,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:41:36,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706012082] [2022-11-03 03:41:36,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:41:36,152 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:41:36,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:41:36,153 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:41:36,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (115)] Waiting until timeout for monitored process [2022-11-03 03:41:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:41:37,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:41:37,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:41:37,606 INFO L390 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 7 [2022-11-03 03:41:38,638 INFO L356 Elim1Store]: treesize reduction 123, result has 21.7 percent of original size [2022-11-03 03:41:38,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 34 treesize of output 56 [2022-11-03 03:41:38,701 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:41:38,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:41:42,878 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:41:42,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706012082] [2022-11-03 03:41:42,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706012082] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:41:42,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [26157113] [2022-11-03 03:41:42,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:41:42,878 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:41:42,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:41:42,880 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:41:42,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (116)] Waiting until timeout for monitored process [2022-11-03 03:41:45,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:41:45,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 03:41:45,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:41:45,130 INFO L390 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 7 [2022-11-03 03:41:50,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:50,730 INFO L356 Elim1Store]: treesize reduction 91, result has 27.2 percent of original size [2022-11-03 03:41:50,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 53 [2022-11-03 03:41:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:41:50,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:41:54,547 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:41:54,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [26157113] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:41:54,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:41:54,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 8] total 14 [2022-11-03 03:41:54,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936642719] [2022-11-03 03:41:54,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:41:54,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:41:54,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:41:54,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:41:54,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=174, Unknown=4, NotChecked=0, Total=240 [2022-11-03 03:41:54,549 INFO L87 Difference]: Start difference. First operand 634 states and 771 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:41:54,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:41:54,793 INFO L93 Difference]: Finished difference Result 644 states and 778 transitions. [2022-11-03 03:41:54,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:41:54,794 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-11-03 03:41:54,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:41:54,797 INFO L225 Difference]: With dead ends: 644 [2022-11-03 03:41:54,797 INFO L226 Difference]: Without dead ends: 644 [2022-11-03 03:41:54,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 183 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=62, Invalid=174, Unknown=4, NotChecked=0, Total=240 [2022-11-03 03:41:54,798 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 70 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:41:54,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 281 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 142 Unchecked, 0.2s Time] [2022-11-03 03:41:54,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2022-11-03 03:41:54,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 616. [2022-11-03 03:41:54,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 567 states have (on average 1.2345679012345678) internal successors, (700), 588 states have internal predecessors, (700), 8 states have call successors, (8), 3 states have call predecessors, (8), 10 states have return successors, (34), 24 states have call predecessors, (34), 8 states have call successors, (34) [2022-11-03 03:41:54,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 742 transitions. [2022-11-03 03:41:54,821 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 742 transitions. Word has length 67 [2022-11-03 03:41:54,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:41:54,822 INFO L495 AbstractCegarLoop]: Abstraction has 616 states and 742 transitions. [2022-11-03 03:41:54,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:41:54,822 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 742 transitions. [2022-11-03 03:41:54,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 03:41:54,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:41:54,824 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:41:54,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (115)] Ended with exit code 0 [2022-11-03 03:41:55,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (116)] Forceful destruction successful, exit code 0 [2022-11-03 03:41:55,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:41:55,233 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:41:55,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:41:55,234 INFO L85 PathProgramCache]: Analyzing trace with hash -747494556, now seen corresponding path program 1 times [2022-11-03 03:41:55,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:41:55,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1554320389] [2022-11-03 03:41:55,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:41:55,235 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:41:55,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:41:55,236 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:41:55,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (117)] Waiting until timeout for monitored process [2022-11-03 03:41:56,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:41:56,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:41:56,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:41:56,680 INFO L390 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 7 [2022-11-03 03:41:56,689 INFO L390 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 [2022-11-03 03:42:00,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:00,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:00,269 INFO L356 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-11-03 03:42:00,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 39 [2022-11-03 03:42:00,351 INFO L356 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-11-03 03:42:00,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 38 [2022-11-03 03:42:00,495 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:42:00,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:42:07,372 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:42:07,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1554320389] [2022-11-03 03:42:07,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1554320389] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:42:07,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2019067648] [2022-11-03 03:42:07,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:42:07,373 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:42:07,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:42:07,374 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:42:07,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (118)] Waiting until timeout for monitored process [2022-11-03 03:42:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:42:10,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 03:42:10,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:42:10,163 INFO L390 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 [2022-11-03 03:42:10,171 INFO L390 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 7 [2022-11-03 03:42:25,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:25,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:25,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:25,355 INFO L356 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-03 03:42:25,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 36 [2022-11-03 03:42:25,424 INFO L356 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-03 03:42:25,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-11-03 03:42:25,453 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:42:25,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:42:28,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2019067648] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:42:28,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347471223] [2022-11-03 03:42:28,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:42:28,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:42:28,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:42:28,056 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:42:28,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-11-03 03:42:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:42:29,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 03:42:29,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:42:29,290 INFO L390 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 [2022-11-03 03:42:29,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:42:30,020 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:42:30,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 43 [2022-11-03 03:42:30,153 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:42:30,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 43 [2022-11-03 03:42:30,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 26 treesize of output 18 [2022-11-03 03:42:39,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:39,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:39,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:39,940 INFO L356 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-03 03:42:39,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 36 [2022-11-03 03:42:40,001 INFO L356 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-03 03:42:40,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-11-03 03:42:40,037 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 03:42:40,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:42:47,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347471223] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:42:47,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:42:47,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 10] total 15 [2022-11-03 03:42:47,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295428841] [2022-11-03 03:42:47,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:42:47,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 03:42:47,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:42:47,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 03:42:47,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=311, Unknown=11, NotChecked=0, Total=380 [2022-11-03 03:42:47,272 INFO L87 Difference]: Start difference. First operand 616 states and 742 transitions. Second operand has 16 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 states have internal predecessors, (109), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 03:42:50,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:42:50,572 INFO L93 Difference]: Finished difference Result 745 states and 887 transitions. [2022-11-03 03:42:50,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 03:42:50,572 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 states have internal predecessors, (109), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 67 [2022-11-03 03:42:50,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:42:50,575 INFO L225 Difference]: With dead ends: 745 [2022-11-03 03:42:50,575 INFO L226 Difference]: Without dead ends: 745 [2022-11-03 03:42:50,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 43.9s TimeCoverageRelationStatistics Valid=72, Invalid=379, Unknown=11, NotChecked=0, Total=462 [2022-11-03 03:42:50,576 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 113 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:42:50,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 875 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 283 Invalid, 0 Unknown, 269 Unchecked, 0.8s Time] [2022-11-03 03:42:50,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-11-03 03:42:50,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 616. [2022-11-03 03:42:50,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 567 states have (on average 1.2345679012345678) internal successors, (700), 588 states have internal predecessors, (700), 8 states have call successors, (8), 3 states have call predecessors, (8), 10 states have return successors, (34), 24 states have call predecessors, (34), 8 states have call successors, (34) [2022-11-03 03:42:50,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 742 transitions. [2022-11-03 03:42:50,588 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 742 transitions. Word has length 67 [2022-11-03 03:42:50,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:42:50,589 INFO L495 AbstractCegarLoop]: Abstraction has 616 states and 742 transitions. [2022-11-03 03:42:50,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 states have internal predecessors, (109), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 03:42:50,589 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 742 transitions. [2022-11-03 03:42:50,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 03:42:50,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:42:50,590 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:42:50,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (118)] Forceful destruction successful, exit code 0 [2022-11-03 03:42:50,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-11-03 03:42:51,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (117)] Forceful destruction successful, exit code 0 [2022-11-03 03:42:51,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:42:51,215 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-11-03 03:42:51,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:42:51,216 INFO L85 PathProgramCache]: Analyzing trace with hash 803066894, now seen corresponding path program 1 times [2022-11-03 03:42:51,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:42:51,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709143208] [2022-11-03 03:42:51,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:42:51,216 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:42:51,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:42:51,217 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:42:51,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72edefde-9999-4175-80d4-ee14e9fc96f6/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (120)] Waiting until timeout for monitored process [2022-11-03 03:42:52,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:42:52,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-03 03:42:52,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:42:52,469 INFO L390 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 7 [2022-11-03 03:42:52,540 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:42:52,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-03 03:42:52,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:42:52,837 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-03 03:42:53,026 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:42:53,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 40 [2022-11-03 03:42:53,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:53,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-03 03:42:53,161 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:42:53,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 40 [2022-11-03 03:42:53,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:53,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-03 03:42:53,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 24 treesize of output 12 [2022-11-03 03:42:53,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:53,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-03 03:42:55,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:55,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:55,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:55,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:55,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2022-11-03 03:42:55,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 49 [2022-11-03 03:42:55,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 03:42:57,878 INFO L356 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2022-11-03 03:42:57,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 37 [2022-11-03 03:42:58,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:42:58,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 03:42:58,262 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 03:42:58,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:58,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-03 03:42:59,493 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-11-03 03:42:59,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 47 [2022-11-03 03:42:59,802 INFO L356 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2022-11-03 03:42:59,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 27 [2022-11-03 03:42:59,868 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:42:59,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:43:01,147 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:43:01,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 6534 treesize of output 6167