./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh --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 28b4a2248017400eafcc33919e1388faa83abd48459a3d9191abc0a1d3b17a56 --- 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-2329fc7 [2022-12-14 15:24:24,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:24:24,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:24:24,773 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:24:24,773 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:24:24,774 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:24:24,775 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:24:24,776 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:24:24,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:24:24,777 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:24:24,778 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:24:24,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:24:24,779 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:24:24,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:24:24,780 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:24:24,781 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:24:24,781 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:24:24,782 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:24:24,783 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:24:24,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:24:24,785 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:24:24,786 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:24:24,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:24:24,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:24:24,788 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:24:24,789 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:24:24,789 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:24:24,789 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:24:24,790 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:24:24,790 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:24:24,791 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:24:24,791 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:24:24,791 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:24:24,792 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:24:24,793 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:24:24,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:24:24,793 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:24:24,793 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:24:24,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:24:24,794 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:24:24,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:24:24,795 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 15:24:24,809 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:24:24,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:24:24,810 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:24:24,810 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:24:24,810 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:24:24,810 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:24:24,810 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:24:24,811 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:24:24,811 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:24:24,811 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:24:24,811 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:24:24,811 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:24:24,811 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:24:24,811 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:24:24,812 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:24:24,812 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:24:24,812 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:24:24,812 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:24:24,812 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 15:24:24,813 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 15:24:24,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:24:24,813 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:24:24,813 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 15:24:24,813 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:24:24,813 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:24:24,813 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:24:24,813 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 15:24:24,814 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 15:24:24,814 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 15:24:24,814 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:24:24,814 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 15:24:24,814 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:24:24,814 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:24:24,814 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:24:24,815 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:24:24,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:24:24,815 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:24:24,815 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:24:24,815 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:24:24,815 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:24:24,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:24:24,815 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:24:24,816 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_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 28b4a2248017400eafcc33919e1388faa83abd48459a3d9191abc0a1d3b17a56 [2022-12-14 15:24:24,976 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:24:24,994 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:24:24,996 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:24:24,997 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:24:24,997 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:24:24,998 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i [2022-12-14 15:24:27,508 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:24:27,729 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:24:27,729 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i [2022-12-14 15:24:27,741 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/data/06263a376/f879a16cd87b4c278039b727571a6238/FLAGd1c623ef5 [2022-12-14 15:24:28,077 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/data/06263a376/f879a16cd87b4c278039b727571a6238 [2022-12-14 15:24:28,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:24:28,082 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:24:28,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:24:28,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:24:28,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:24:28,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:24:28" (1/1) ... [2022-12-14 15:24:28,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bc72af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:24:28, skipping insertion in model container [2022-12-14 15:24:28,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:24:28" (1/1) ... [2022-12-14 15:24:28,099 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:24:28,130 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:24:28,391 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:24:28,409 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) [2022-12-14 15:24:28,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7a466cfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:24:28, skipping insertion in model container [2022-12-14 15:24:28,409 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:24:28,410 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 15:24:28,412 INFO L158 Benchmark]: Toolchain (without parser) took 329.39ms. Allocated memory is still 146.8MB. Free memory was 109.3MB in the beginning and 94.2MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-14 15:24:28,412 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 100.7MB. Free memory is still 48.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 15:24:28,413 INFO L158 Benchmark]: CACSL2BoogieTranslator took 326.73ms. Allocated memory is still 146.8MB. Free memory was 109.3MB in the beginning and 94.2MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-14 15:24:28,414 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 100.7MB. Free memory is still 48.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 326.73ms. Allocated memory is still 146.8MB. Free memory was 109.3MB in the beginning and 94.2MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: 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_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh --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 28b4a2248017400eafcc33919e1388faa83abd48459a3d9191abc0a1d3b17a56 --- 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-2329fc7 [2022-12-14 15:24:29,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:24:29,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:24:29,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:24:29,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:24:29,815 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:24:29,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:24:29,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:24:29,818 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:24:29,818 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:24:29,819 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:24:29,820 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:24:29,820 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:24:29,820 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:24:29,821 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:24:29,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:24:29,822 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:24:29,823 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:24:29,824 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:24:29,825 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:24:29,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:24:29,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:24:29,827 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:24:29,828 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:24:29,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:24:29,830 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:24:29,830 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:24:29,831 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:24:29,831 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:24:29,832 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:24:29,832 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:24:29,832 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:24:29,840 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:24:29,841 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:24:29,843 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:24:29,843 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:24:29,844 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:24:29,844 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:24:29,844 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:24:29,845 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:24:29,846 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:24:29,847 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 15:24:29,862 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:24:29,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:24:29,862 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:24:29,862 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:24:29,862 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:24:29,863 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:24:29,863 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:24:29,863 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:24:29,863 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:24:29,863 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:24:29,863 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:24:29,863 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:24:29,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 15:24:29,864 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 15:24:29,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:24:29,864 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:24:29,864 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 15:24:29,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:24:29,864 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:24:29,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:24:29,864 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 15:24:29,864 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 15:24:29,865 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 15:24:29,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:24:29,865 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 15:24:29,865 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 15:24:29,865 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 15:24:29,865 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:24:29,865 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:24:29,865 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:24:29,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 15:24:29,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:24:29,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:24:29,866 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:24:29,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:24:29,866 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 15:24:29,866 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 15:24:29,866 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:24:29,866 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 15:24:29,866 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_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 28b4a2248017400eafcc33919e1388faa83abd48459a3d9191abc0a1d3b17a56 [2022-12-14 15:24:30,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:24:30,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:24:30,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:24:30,107 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:24:30,107 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:24:30,108 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i [2022-12-14 15:24:32,671 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:24:32,868 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:24:32,869 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i [2022-12-14 15:24:32,878 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/data/511ccdfe5/9c7fde3e4f344975ad5fb590e2b3f458/FLAG3bd14cc03 [2022-12-14 15:24:33,231 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/data/511ccdfe5/9c7fde3e4f344975ad5fb590e2b3f458 [2022-12-14 15:24:33,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:24:33,235 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:24:33,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:24:33,236 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:24:33,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:24:33,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:24:33" (1/1) ... [2022-12-14 15:24:33,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61324fca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:24:33, skipping insertion in model container [2022-12-14 15:24:33,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:24:33" (1/1) ... [2022-12-14 15:24:33,250 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:24:33,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:24:33,535 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:24:33,548 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 15:24:33,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:24:33,609 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:24:33,616 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:24:33,652 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:24:33,676 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:24:33,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:24:33 WrapperNode [2022-12-14 15:24:33,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:24:33,677 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:24:33,678 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:24:33,678 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:24:33,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:24:33" (1/1) ... [2022-12-14 15:24:33,698 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:24:33" (1/1) ... [2022-12-14 15:24:33,718 INFO L138 Inliner]: procedures = 179, calls = 145, calls flagged for inlining = 33, calls inlined = 20, statements flattened = 331 [2022-12-14 15:24:33,718 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:24:33,719 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:24:33,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:24:33,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:24:33,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:24:33" (1/1) ... [2022-12-14 15:24:33,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:24:33" (1/1) ... [2022-12-14 15:24:33,729 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:24:33" (1/1) ... [2022-12-14 15:24:33,730 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:24:33" (1/1) ... [2022-12-14 15:24:33,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:24:33" (1/1) ... [2022-12-14 15:24:33,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:24:33" (1/1) ... [2022-12-14 15:24:33,745 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:24:33" (1/1) ... [2022-12-14 15:24:33,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:24:33" (1/1) ... [2022-12-14 15:24:33,750 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:24:33,751 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:24:33,751 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:24:33,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:24:33,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:24:33" (1/1) ... [2022-12-14 15:24:33,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:24:33,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:24:33,774 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:24:33,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:24:33,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-12-14 15:24:33,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 15:24:33,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-12-14 15:24:33,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-12-14 15:24:33,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-12-14 15:24:33,809 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-12-14 15:24:33,809 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2022-12-14 15:24:33,809 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2022-12-14 15:24:33,809 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2022-12-14 15:24:33,809 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2022-12-14 15:24:33,809 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-12-14 15:24:33,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-12-14 15:24:33,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2022-12-14 15:24:33,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2022-12-14 15:24:33,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 15:24:33,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:24:33,810 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_msg_free [2022-12-14 15:24:33,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_msg_free [2022-12-14 15:24:33,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 15:24:33,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 15:24:33,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2022-12-14 15:24:33,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 15:24:33,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-12-14 15:24:33,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 15:24:33,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 15:24:33,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-12-14 15:24:33,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2022-12-14 15:24:33,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:24:33,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:24:33,978 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:24:33,980 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:24:33,984 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-14 15:24:34,940 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:24:34,948 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:24:34,948 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 15:24:34,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:24:34 BoogieIcfgContainer [2022-12-14 15:24:34,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:24:34,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:24:34,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:24:34,956 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:24:34,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:24:33" (1/3) ... [2022-12-14 15:24:34,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11a8c39d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:24:34, skipping insertion in model container [2022-12-14 15:24:34,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:24:33" (2/3) ... [2022-12-14 15:24:34,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11a8c39d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:24:34, skipping insertion in model container [2022-12-14 15:24:34,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:24:34" (3/3) ... [2022-12-14 15:24:34,959 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test12-1.i [2022-12-14 15:24:34,975 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:24:34,976 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 124 error locations. [2022-12-14 15:24:35,013 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:24:35,017 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;@64443ba2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:24:35,017 INFO L358 AbstractCegarLoop]: Starting to check reachability of 124 error locations. [2022-12-14 15:24:35,021 INFO L276 IsEmpty]: Start isEmpty. Operand has 313 states, 171 states have (on average 1.8654970760233918) internal successors, (319), 294 states have internal predecessors, (319), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-14 15:24:35,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 15:24:35,026 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:24:35,027 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:24:35,027 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:24:35,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:24:35,031 INFO L85 PathProgramCache]: Analyzing trace with hash -297378988, now seen corresponding path program 1 times [2022-12-14 15:24:35,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:24:35,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608719850] [2022-12-14 15:24:35,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:24:35,041 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:24:35,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:24:35,042 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:24:35,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 15:24:35,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:24:35,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 15:24:35,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:24:35,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:24:35,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:24:35,258 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:24:35,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608719850] [2022-12-14 15:24:35,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608719850] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:24:35,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:24:35,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 15:24:35,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262614341] [2022-12-14 15:24:35,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:24:35,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:24:35,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:24:35,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:24:35,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:24:35,295 INFO L87 Difference]: Start difference. First operand has 313 states, 171 states have (on average 1.8654970760233918) internal successors, (319), 294 states have internal predecessors, (319), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 15:24:36,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:24:36,214 INFO L93 Difference]: Finished difference Result 412 states and 459 transitions. [2022-12-14 15:24:36,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:24:36,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-12-14 15:24:36,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:24:36,225 INFO L225 Difference]: With dead ends: 412 [2022-12-14 15:24:36,225 INFO L226 Difference]: Without dead ends: 408 [2022-12-14 15:24:36,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:24:36,228 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 299 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 15:24:36,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 506 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 15:24:36,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-12-14 15:24:36,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 344. [2022-12-14 15:24:36,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 200 states have (on average 1.83) internal successors, (366), 321 states have internal predecessors, (366), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-12-14 15:24:36,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 402 transitions. [2022-12-14 15:24:36,270 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 402 transitions. Word has length 11 [2022-12-14 15:24:36,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:24:36,271 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 402 transitions. [2022-12-14 15:24:36,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 15:24:36,271 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 402 transitions. [2022-12-14 15:24:36,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 15:24:36,272 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:24:36,272 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:24:36,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 15:24:36,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:24:36,475 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:24:36,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:24:36,477 INFO L85 PathProgramCache]: Analyzing trace with hash -297378987, now seen corresponding path program 1 times [2022-12-14 15:24:36,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:24:36,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1731925062] [2022-12-14 15:24:36,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:24:36,479 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:24:36,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:24:36,482 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:24:36,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 15:24:36,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:24:36,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 15:24:36,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:24:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:24:36,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:24:36,722 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:24:36,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1731925062] [2022-12-14 15:24:36,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1731925062] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:24:36,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:24:36,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 15:24:36,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187039996] [2022-12-14 15:24:36,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:24:36,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:24:36,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:24:36,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:24:36,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:24:36,724 INFO L87 Difference]: Start difference. First operand 344 states and 402 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 15:24:37,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:24:37,452 INFO L93 Difference]: Finished difference Result 476 states and 564 transitions. [2022-12-14 15:24:37,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:24:37,453 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-12-14 15:24:37,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:24:37,456 INFO L225 Difference]: With dead ends: 476 [2022-12-14 15:24:37,456 INFO L226 Difference]: Without dead ends: 476 [2022-12-14 15:24:37,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:24:37,457 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 131 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 15:24:37,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 832 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 15:24:37,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-12-14 15:24:37,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 407. [2022-12-14 15:24:37,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 256 states have (on average 1.83203125) internal successors, (469), 376 states have internal predecessors, (469), 22 states have call successors, (22), 9 states have call predecessors, (22), 9 states have return successors, (29), 23 states have call predecessors, (29), 22 states have call successors, (29) [2022-12-14 15:24:37,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 520 transitions. [2022-12-14 15:24:37,481 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 520 transitions. Word has length 11 [2022-12-14 15:24:37,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:24:37,481 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 520 transitions. [2022-12-14 15:24:37,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 15:24:37,481 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 520 transitions. [2022-12-14 15:24:37,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 15:24:37,482 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:24:37,482 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:24:37,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 15:24:37,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:24:37,684 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:24:37,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:24:37,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1184882668, now seen corresponding path program 1 times [2022-12-14 15:24:37,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:24:37,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2138074870] [2022-12-14 15:24:37,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:24:37,689 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:24:37,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:24:37,692 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:24:37,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 15:24:37,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:24:37,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:24:37,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:24:37,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:24:37,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:24:37,769 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:24:37,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2138074870] [2022-12-14 15:24:37,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2138074870] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:24:37,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:24:37,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 15:24:37,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368862639] [2022-12-14 15:24:37,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:24:37,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:24:37,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:24:37,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:24:37,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:24:37,771 INFO L87 Difference]: Start difference. First operand 407 states and 520 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2022-12-14 15:24:37,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:24:37,897 INFO L93 Difference]: Finished difference Result 649 states and 797 transitions. [2022-12-14 15:24:37,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:24:37,898 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 11 [2022-12-14 15:24:37,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:24:37,901 INFO L225 Difference]: With dead ends: 649 [2022-12-14 15:24:37,901 INFO L226 Difference]: Without dead ends: 649 [2022-12-14 15:24:37,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:24:37,902 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 259 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 1486 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:24:37,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 1486 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:24:37,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-12-14 15:24:37,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 392. [2022-12-14 15:24:37,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 241 states have (on average 1.8215767634854771) internal successors, (439), 362 states have internal predecessors, (439), 21 states have call successors, (21), 9 states have call predecessors, (21), 10 states have return successors, (34), 22 states have call predecessors, (34), 21 states have call successors, (34) [2022-12-14 15:24:37,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 494 transitions. [2022-12-14 15:24:37,927 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 494 transitions. Word has length 11 [2022-12-14 15:24:37,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:24:37,928 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 494 transitions. [2022-12-14 15:24:37,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2022-12-14 15:24:37,928 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 494 transitions. [2022-12-14 15:24:37,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 15:24:37,928 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:24:37,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:24:37,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 15:24:38,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:24:38,130 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr91REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:24:38,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:24:38,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1981613461, now seen corresponding path program 1 times [2022-12-14 15:24:38,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:24:38,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [990123462] [2022-12-14 15:24:38,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:24:38,132 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:24:38,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:24:38,135 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:24:38,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-14 15:24:38,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:24:38,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:24:38,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:24:38,372 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:24:38,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:24:38,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:24:38,399 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:24:38,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [990123462] [2022-12-14 15:24:38,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [990123462] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:24:38,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:24:38,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:24:38,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445539208] [2022-12-14 15:24:38,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:24:38,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:24:38,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:24:38,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:24:38,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:24:38,401 INFO L87 Difference]: Start difference. First operand 392 states and 494 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-12-14 15:24:39,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:24:39,404 INFO L93 Difference]: Finished difference Result 436 states and 541 transitions. [2022-12-14 15:24:39,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:24:39,405 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 13 [2022-12-14 15:24:39,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:24:39,407 INFO L225 Difference]: With dead ends: 436 [2022-12-14 15:24:39,407 INFO L226 Difference]: Without dead ends: 436 [2022-12-14 15:24:39,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-14 15:24:39,409 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 61 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 15:24:39,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 1152 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 15:24:39,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-12-14 15:24:39,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 404. [2022-12-14 15:24:39,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 250 states have (on average 1.804) internal successors, (451), 372 states have internal predecessors, (451), 21 states have call successors, (21), 11 states have call predecessors, (21), 13 states have return successors, (34), 22 states have call predecessors, (34), 21 states have call successors, (34) [2022-12-14 15:24:39,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 506 transitions. [2022-12-14 15:24:39,423 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 506 transitions. Word has length 13 [2022-12-14 15:24:39,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:24:39,423 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 506 transitions. [2022-12-14 15:24:39,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-12-14 15:24:39,424 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 506 transitions. [2022-12-14 15:24:39,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 15:24:39,424 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:24:39,424 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:24:39,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-14 15:24:39,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:24:39,625 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:24:39,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:24:39,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1981613462, now seen corresponding path program 1 times [2022-12-14 15:24:39,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:24:39,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1660432207] [2022-12-14 15:24:39,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:24:39,626 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:24:39,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:24:39,627 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:24:39,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-14 15:24:39,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:24:39,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 15:24:39,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:24:39,839 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:24:39,847 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:24:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:24:39,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:24:39,882 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:24:39,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1660432207] [2022-12-14 15:24:39,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1660432207] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:24:39,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:24:39,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:24:39,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687930813] [2022-12-14 15:24:39,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:24:39,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:24:39,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:24:39,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:24:39,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:24:39,884 INFO L87 Difference]: Start difference. First operand 404 states and 506 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-12-14 15:24:41,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:24:41,108 INFO L93 Difference]: Finished difference Result 424 states and 522 transitions. [2022-12-14 15:24:41,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:24:41,109 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 13 [2022-12-14 15:24:41,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:24:41,111 INFO L225 Difference]: With dead ends: 424 [2022-12-14 15:24:41,111 INFO L226 Difference]: Without dead ends: 424 [2022-12-14 15:24:41,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-14 15:24:41,112 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 34 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:24:41,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1291 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 15:24:41,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-12-14 15:24:41,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 413. [2022-12-14 15:24:41,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 259 states have (on average 1.7915057915057915) internal successors, (464), 381 states have internal predecessors, (464), 21 states have call successors, (21), 11 states have call predecessors, (21), 13 states have return successors, (34), 22 states have call predecessors, (34), 21 states have call successors, (34) [2022-12-14 15:24:41,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 519 transitions. [2022-12-14 15:24:41,125 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 519 transitions. Word has length 13 [2022-12-14 15:24:41,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:24:41,125 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 519 transitions. [2022-12-14 15:24:41,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-12-14 15:24:41,126 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 519 transitions. [2022-12-14 15:24:41,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 15:24:41,126 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:24:41,126 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:24:41,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-14 15:24:41,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:24:41,328 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr86ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:24:41,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:24:41,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1895308392, now seen corresponding path program 1 times [2022-12-14 15:24:41,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:24:41,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681896774] [2022-12-14 15:24:41,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:24:41,330 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:24:41,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:24:41,333 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:24:41,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-14 15:24:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:24:41,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 15:24:41,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:24:41,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:24:41,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:24:41,468 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:24:41,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681896774] [2022-12-14 15:24:41,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681896774] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:24:41,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:24:41,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 15:24:41,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981704724] [2022-12-14 15:24:41,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:24:41,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:24:41,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:24:41,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:24:41,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:24:41,469 INFO L87 Difference]: Start difference. First operand 413 states and 519 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-12-14 15:24:41,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:24:41,538 INFO L93 Difference]: Finished difference Result 351 states and 397 transitions. [2022-12-14 15:24:41,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:24:41,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) Word has length 17 [2022-12-14 15:24:41,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:24:41,539 INFO L225 Difference]: With dead ends: 351 [2022-12-14 15:24:41,539 INFO L226 Difference]: Without dead ends: 351 [2022-12-14 15:24:41,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:24:41,540 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 10 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:24:41,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 1342 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:24:41,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-12-14 15:24:41,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 345. [2022-12-14 15:24:41,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 199 states have (on average 1.7688442211055277) internal successors, (352), 320 states have internal predecessors, (352), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (19), 17 states have call predecessors, (19), 16 states have call successors, (19) [2022-12-14 15:24:41,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 387 transitions. [2022-12-14 15:24:41,546 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 387 transitions. Word has length 17 [2022-12-14 15:24:41,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:24:41,546 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 387 transitions. [2022-12-14 15:24:41,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-12-14 15:24:41,546 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 387 transitions. [2022-12-14 15:24:41,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 15:24:41,547 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:24:41,547 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:24:41,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-14 15:24:41,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:24:41,748 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr86ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:24:41,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:24:41,748 INFO L85 PathProgramCache]: Analyzing trace with hash -2106255897, now seen corresponding path program 1 times [2022-12-14 15:24:41,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:24:41,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [496765424] [2022-12-14 15:24:41,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:24:41,748 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:24:41,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:24:41,749 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:24:41,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-14 15:24:41,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:24:41,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:24:41,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:24:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:24:41,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:24:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:24:41,844 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:24:41,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [496765424] [2022-12-14 15:24:41,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [496765424] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:24:41,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1151383496] [2022-12-14 15:24:41,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:24:41,845 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:24:41,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:24:41,846 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:24:41,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-12-14 15:24:41,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:24:41,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:24:41,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:24:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:24:41,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:24:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:24:41,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1151383496] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:24:41,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690669323] [2022-12-14 15:24:41,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:24:41,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:24:41,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:24:41,958 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:24:41,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 15:24:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:24:42,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:24:42,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:24:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:24:42,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:24:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:24:42,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690669323] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:24:42,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:24:42,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 4 [2022-12-14 15:24:42,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18910371] [2022-12-14 15:24:42,062 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:24:42,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:24:42,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:24:42,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:24:42,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:24:42,063 INFO L87 Difference]: Start difference. First operand 345 states and 387 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 15:24:42,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:24:42,136 INFO L93 Difference]: Finished difference Result 344 states and 386 transitions. [2022-12-14 15:24:42,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:24:42,137 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-12-14 15:24:42,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:24:42,139 INFO L225 Difference]: With dead ends: 344 [2022-12-14 15:24:42,139 INFO L226 Difference]: Without dead ends: 344 [2022-12-14 15:24:42,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:24:42,140 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 256 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:24:42,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 1052 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:24:42,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-12-14 15:24:42,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2022-12-14 15:24:42,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 199 states have (on average 1.763819095477387) internal successors, (351), 319 states have internal predecessors, (351), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (19), 17 states have call predecessors, (19), 16 states have call successors, (19) [2022-12-14 15:24:42,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 386 transitions. [2022-12-14 15:24:42,148 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 386 transitions. Word has length 17 [2022-12-14 15:24:42,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:24:42,149 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 386 transitions. [2022-12-14 15:24:42,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 15:24:42,149 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 386 transitions. [2022-12-14 15:24:42,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 15:24:42,150 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:24:42,150 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:24:42,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-14 15:24:42,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-12-14 15:24:42,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 15:24:42,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:24:42,754 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:24:42,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:24:42,755 INFO L85 PathProgramCache]: Analyzing trace with hash -2106256148, now seen corresponding path program 1 times [2022-12-14 15:24:42,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:24:42,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1732969938] [2022-12-14 15:24:42,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:24:42,756 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:24:42,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:24:42,759 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:24:42,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-14 15:24:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:24:42,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 15:24:42,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:24:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:24:42,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:24:42,868 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:24:42,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1732969938] [2022-12-14 15:24:42,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1732969938] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:24:42,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:24:42,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 15:24:42,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543811881] [2022-12-14 15:24:42,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:24:42,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:24:42,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:24:42,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:24:42,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:24:42,870 INFO L87 Difference]: Start difference. First operand 344 states and 386 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 15:24:42,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:24:42,916 INFO L93 Difference]: Finished difference Result 388 states and 436 transitions. [2022-12-14 15:24:42,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:24:42,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-12-14 15:24:42,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:24:42,918 INFO L225 Difference]: With dead ends: 388 [2022-12-14 15:24:42,918 INFO L226 Difference]: Without dead ends: 388 [2022-12-14 15:24:42,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:24:42,918 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 40 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1375 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:24:42,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1375 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:24:42,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-12-14 15:24:42,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 346. [2022-12-14 15:24:42,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 201 states have (on average 1.756218905472637) internal successors, (353), 320 states have internal predecessors, (353), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2022-12-14 15:24:42,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 388 transitions. [2022-12-14 15:24:42,924 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 388 transitions. Word has length 17 [2022-12-14 15:24:42,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:24:42,924 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 388 transitions. [2022-12-14 15:24:42,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 15:24:42,924 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 388 transitions. [2022-12-14 15:24:42,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 15:24:42,925 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:24:42,925 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:24:42,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-14 15:24:43,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:24:43,127 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:24:43,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:24:43,129 INFO L85 PathProgramCache]: Analyzing trace with hash -2134885299, now seen corresponding path program 1 times [2022-12-14 15:24:43,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:24:43,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10568727] [2022-12-14 15:24:43,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:24:43,130 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:24:43,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:24:43,133 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:24:43,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-14 15:24:43,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:24:43,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:24:43,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:24:43,307 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:24:43,346 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_16 (_ BitVec 1))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_16) |c_#valid|)))) is different from true [2022-12-14 15:24:43,374 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:24:43,375 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:24:43,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 15:24:43,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:24:43,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:24:43,512 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:24:43,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10568727] [2022-12-14 15:24:43,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10568727] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:24:43,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1859997902] [2022-12-14 15:24:43,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:24:43,512 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:24:43,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:24:43,513 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:24:43,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-12-14 15:24:43,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:24:43,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 15:24:43,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:24:43,623 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:24:43,641 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_26 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_26))))) is different from true [2022-12-14 15:24:43,670 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:24:43,670 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:24:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 15:24:43,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:24:43,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:24:43,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1859997902] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:24:43,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959200566] [2022-12-14 15:24:43,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:24:43,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:24:43,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:24:43,806 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:24:43,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 15:24:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:24:43,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:24:43,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:24:43,883 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:24:43,907 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_36 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_36))) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-12-14 15:24:43,934 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:24:43,934 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:24:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 15:24:43,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:24:44,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:24:44,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959200566] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:24:44,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:24:44,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6, 5, 6, 5] total 9 [2022-12-14 15:24:44,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826433048] [2022-12-14 15:24:44,067 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:24:44,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 15:24:44,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:24:44,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 15:24:44,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=33, Unknown=3, NotChecked=36, Total=90 [2022-12-14 15:24:44,068 INFO L87 Difference]: Start difference. First operand 346 states and 388 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 15:24:45,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:24:45,406 INFO L93 Difference]: Finished difference Result 381 states and 424 transitions. [2022-12-14 15:24:45,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:24:45,407 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 17 [2022-12-14 15:24:45,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:24:45,408 INFO L225 Difference]: With dead ends: 381 [2022-12-14 15:24:45,408 INFO L226 Difference]: Without dead ends: 381 [2022-12-14 15:24:45,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 8 SemanticMatches, 9 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=43, Unknown=3, NotChecked=42, Total=110 [2022-12-14 15:24:45,409 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 191 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1180 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:24:45,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 1015 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 836 Invalid, 0 Unknown, 1180 Unchecked, 1.3s Time] [2022-12-14 15:24:45,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-12-14 15:24:45,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 348. [2022-12-14 15:24:45,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 205 states have (on average 1.7317073170731707) internal successors, (355), 322 states have internal predecessors, (355), 16 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (20), 18 states have call predecessors, (20), 16 states have call successors, (20) [2022-12-14 15:24:45,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 391 transitions. [2022-12-14 15:24:45,415 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 391 transitions. Word has length 17 [2022-12-14 15:24:45,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:24:45,415 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 391 transitions. [2022-12-14 15:24:45,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 15:24:45,415 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 391 transitions. [2022-12-14 15:24:45,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 15:24:45,415 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:24:45,415 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:24:45,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-12-14 15:24:45,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-14 15:24:45,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-14 15:24:46,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:24:46,017 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:24:46,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:24:46,018 INFO L85 PathProgramCache]: Analyzing trace with hash -2134885298, now seen corresponding path program 1 times [2022-12-14 15:24:46,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:24:46,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478645416] [2022-12-14 15:24:46,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:24:46,019 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:24:46,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:24:46,020 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:24:46,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-14 15:24:46,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:24:46,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 15:24:46,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:24:46,103 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:24:46,108 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:24:46,197 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_47 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_47))))) is different from true [2022-12-14 15:24:46,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:24:46,211 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:24:46,220 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:24:46,220 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:24:46,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 15:24:46,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:24:46,764 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:24:46,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478645416] [2022-12-14 15:24:46,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478645416] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:24:46,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [84398840] [2022-12-14 15:24:46,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:24:46,764 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:24:46,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:24:46,765 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:24:46,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-12-14 15:24:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:24:46,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 15:24:46,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:24:46,867 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:24:46,874 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:24:46,926 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_57 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_57))))) is different from true [2022-12-14 15:24:46,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:24:46,943 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:24:46,952 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:24:46,952 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:24:46,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 15:24:46,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:24:49,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [84398840] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:24:49,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040683553] [2022-12-14 15:24:49,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:24:49,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:24:49,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:24:49,129 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:24:49,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 15:24:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:24:49,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 15:24:49,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:24:49,201 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:24:49,206 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:24:49,259 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_67 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_67) |c_#length|)))) is different from true [2022-12-14 15:24:49,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:24:49,278 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:24:49,287 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:24:49,288 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:24:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 15:24:49,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:24:49,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040683553] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:24:49,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:24:49,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2022-12-14 15:24:49,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945689989] [2022-12-14 15:24:49,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:24:49,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 15:24:49,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:24:49,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 15:24:49,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=72, Unknown=3, NotChecked=54, Total=156 [2022-12-14 15:24:49,672 INFO L87 Difference]: Start difference. First operand 348 states and 391 transitions. Second operand has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 15:24:52,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:24:52,432 INFO L93 Difference]: Finished difference Result 698 states and 811 transitions. [2022-12-14 15:24:52,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:24:52,433 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 17 [2022-12-14 15:24:52,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:24:52,434 INFO L225 Difference]: With dead ends: 698 [2022-12-14 15:24:52,434 INFO L226 Difference]: Without dead ends: 698 [2022-12-14 15:24:52,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=35, Invalid=106, Unknown=3, NotChecked=66, Total=210 [2022-12-14 15:24:52,435 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 400 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 1789 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 1593 SdHoareTripleChecker+Invalid, 3652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1815 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 15:24:52,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 1593 Invalid, 3652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1789 Invalid, 0 Unknown, 1815 Unchecked, 2.6s Time] [2022-12-14 15:24:52,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-12-14 15:24:52,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 360. [2022-12-14 15:24:52,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 215 states have (on average 1.716279069767442) internal successors, (369), 331 states have internal predecessors, (369), 18 states have call successors, (18), 9 states have call predecessors, (18), 12 states have return successors, (30), 21 states have call predecessors, (30), 18 states have call successors, (30) [2022-12-14 15:24:52,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 417 transitions. [2022-12-14 15:24:52,442 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 417 transitions. Word has length 17 [2022-12-14 15:24:52,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:24:52,443 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 417 transitions. [2022-12-14 15:24:52,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 15:24:52,443 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 417 transitions. [2022-12-14 15:24:52,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 15:24:52,443 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:24:52,443 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:24:52,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 15:24:52,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-14 15:24:52,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2022-12-14 15:24:53,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 15:24:53,046 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr87ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:24:53,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:24:53,047 INFO L85 PathProgramCache]: Analyzing trace with hash -869422937, now seen corresponding path program 1 times [2022-12-14 15:24:53,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:24:53,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [682374324] [2022-12-14 15:24:53,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:24:53,049 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:24:53,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:24:53,050 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:24:53,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-14 15:24:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:24:53,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 15:24:53,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:24:53,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:24:53,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:24:53,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:24:53,379 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:24:53,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [682374324] [2022-12-14 15:24:53,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [682374324] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:24:53,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [322524082] [2022-12-14 15:24:53,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:24:53,379 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:24:53,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:24:53,380 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:24:53,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-12-14 15:24:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:24:53,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:24:53,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:24:53,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:24:53,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:24:53,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:24:53,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [322524082] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:24:53,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842992054] [2022-12-14 15:24:53,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:24:53,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:24:53,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:24:53,507 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:24:53,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 15:24:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:24:53,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:24:53,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:24:53,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:24:53,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:24:53,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:24:53,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842992054] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:24:53,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:24:53,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 5, 4] total 9 [2022-12-14 15:24:53,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270376149] [2022-12-14 15:24:53,609 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:24:53,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 15:24:53,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:24:53,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 15:24:53,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:24:53,610 INFO L87 Difference]: Start difference. First operand 360 states and 417 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 15:24:54,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:24:54,033 INFO L93 Difference]: Finished difference Result 363 states and 418 transitions. [2022-12-14 15:24:54,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 15:24:54,034 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 18 [2022-12-14 15:24:54,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:24:54,035 INFO L225 Difference]: With dead ends: 363 [2022-12-14 15:24:54,035 INFO L226 Difference]: Without dead ends: 363 [2022-12-14 15:24:54,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-12-14 15:24:54,036 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 1101 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:24:54,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1115 Valid, 1214 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:24:54,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-12-14 15:24:54,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 359. [2022-12-14 15:24:54,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 215 states have (on average 1.7069767441860466) internal successors, (367), 330 states have internal predecessors, (367), 18 states have call successors, (18), 9 states have call predecessors, (18), 12 states have return successors, (30), 21 states have call predecessors, (30), 18 states have call successors, (30) [2022-12-14 15:24:54,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 415 transitions. [2022-12-14 15:24:54,041 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 415 transitions. Word has length 18 [2022-12-14 15:24:54,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:24:54,041 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 415 transitions. [2022-12-14 15:24:54,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 15:24:54,041 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 415 transitions. [2022-12-14 15:24:54,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 15:24:54,041 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:24:54,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:24:54,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-14 15:24:54,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2022-12-14 15:24:54,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 15:24:54,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:24:54,643 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:24:54,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:24:54,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1883109288, now seen corresponding path program 1 times [2022-12-14 15:24:54,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:24:54,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852384221] [2022-12-14 15:24:54,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:24:54,647 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:24:54,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:24:54,650 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:24:54,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-14 15:24:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:24:54,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:24:54,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:24:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:24:54,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:24:54,754 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:24:54,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852384221] [2022-12-14 15:24:54,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852384221] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:24:54,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:24:54,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:24:54,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856229200] [2022-12-14 15:24:54,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:24:54,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:24:54,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:24:54,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:24:54,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:24:54,756 INFO L87 Difference]: Start difference. First operand 359 states and 415 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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) [2022-12-14 15:24:55,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:24:55,277 INFO L93 Difference]: Finished difference Result 362 states and 417 transitions. [2022-12-14 15:24:55,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:24:55,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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 18 [2022-12-14 15:24:55,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:24:55,278 INFO L225 Difference]: With dead ends: 362 [2022-12-14 15:24:55,278 INFO L226 Difference]: Without dead ends: 349 [2022-12-14 15:24:55,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:24:55,279 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 41 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 15:24:55,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 661 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 15:24:55,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-12-14 15:24:55,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2022-12-14 15:24:55,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 206 states have (on average 1.733009708737864) internal successors, (357), 321 states have internal predecessors, (357), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (29), 20 states have call predecessors, (29), 18 states have call successors, (29) [2022-12-14 15:24:55,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 404 transitions. [2022-12-14 15:24:55,286 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 404 transitions. Word has length 18 [2022-12-14 15:24:55,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:24:55,287 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 404 transitions. [2022-12-14 15:24:55,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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) [2022-12-14 15:24:55,287 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 404 transitions. [2022-12-14 15:24:55,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 15:24:55,287 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:24:55,287 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:24:55,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-12-14 15:24:55,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:24:55,489 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:24:55,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:24:55,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1969475052, now seen corresponding path program 1 times [2022-12-14 15:24:55,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:24:55,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375277489] [2022-12-14 15:24:55,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:24:55,493 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:24:55,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:24:55,494 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:24:55,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-14 15:24:55,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:24:55,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 15:24:55,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:24:55,636 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:24:55,637 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:24:55,700 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:24:55,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:24:55,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:24:55,745 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:24:55,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375277489] [2022-12-14 15:24:55,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375277489] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:24:55,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1181927084] [2022-12-14 15:24:55,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:24:55,745 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:24:55,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:24:55,746 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:24:55,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-12-14 15:24:55,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:24:55,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 15:24:55,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:24:55,854 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 3 [2022-12-14 15:24:55,898 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:24:55,898 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:24:55,966 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:24:55,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:24:55,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:24:56,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1181927084] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:24:56,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567707698] [2022-12-14 15:24:56,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:24:56,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:24:56,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:24:56,021 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:24:56,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 15:24:56,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:24:56,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 15:24:56,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:24:56,149 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:24:56,150 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:24:56,217 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:24:56,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:24:56,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:24:56,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567707698] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:24:56,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:24:56,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-12-14 15:24:56,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276035291] [2022-12-14 15:24:56,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:24:56,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:24:56,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:24:56,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:24:56,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-14 15:24:56,270 INFO L87 Difference]: Start difference. First operand 349 states and 404 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 15:24:57,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:24:57,654 INFO L93 Difference]: Finished difference Result 426 states and 479 transitions. [2022-12-14 15:24:57,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:24:57,654 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-12-14 15:24:57,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:24:57,656 INFO L225 Difference]: With dead ends: 426 [2022-12-14 15:24:57,656 INFO L226 Difference]: Without dead ends: 426 [2022-12-14 15:24:57,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-12-14 15:24:57,657 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 440 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:24:57,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 838 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 15:24:57,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-12-14 15:24:57,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 351. [2022-12-14 15:24:57,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 208 states have (on average 1.7307692307692308) internal successors, (360), 323 states have internal predecessors, (360), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (29), 20 states have call predecessors, (29), 18 states have call successors, (29) [2022-12-14 15:24:57,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 407 transitions. [2022-12-14 15:24:57,662 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 407 transitions. Word has length 21 [2022-12-14 15:24:57,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:24:57,662 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 407 transitions. [2022-12-14 15:24:57,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 15:24:57,662 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 407 transitions. [2022-12-14 15:24:57,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 15:24:57,662 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:24:57,662 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:24:57,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-12-14 15:24:57,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-14 15:24:58,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2022-12-14 15:24:58,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 15:24:58,265 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:24:58,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:24:58,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1969475053, now seen corresponding path program 1 times [2022-12-14 15:24:58,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:24:58,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1810575838] [2022-12-14 15:24:58,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:24:58,267 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:24:58,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:24:58,270 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:24:58,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-14 15:24:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:24:58,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 15:24:58,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:25:00,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:25:00,418 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:25:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:25:02,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:25:03,112 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:25:03,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1810575838] [2022-12-14 15:25:03,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1810575838] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:25:03,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [31802765] [2022-12-14 15:25:03,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:25:03,112 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:25:03,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:25:03,113 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:25:03,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-12-14 15:25:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:25:03,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 15:25:03,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:25:03,246 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 3 [2022-12-14 15:25:05,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:25:05,331 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:25:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:25:05,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:25:05,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [31802765] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:25:05,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157537922] [2022-12-14 15:25:05,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:25:05,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:25:05,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:25:05,676 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:25:05,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 15:25:05,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:25:05,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 15:25:05,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:25:07,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:25:07,810 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:25:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:25:07,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:25:08,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157537922] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:25:08,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:25:08,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-12-14 15:25:08,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409748892] [2022-12-14 15:25:08,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:25:08,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:25:08,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:25:08,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:25:08,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=60, Unknown=3, NotChecked=0, Total=90 [2022-12-14 15:25:08,115 INFO L87 Difference]: Start difference. First operand 351 states and 407 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 15:25:12,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:25:16,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:25:18,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:25:20,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:25:22,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:25:24,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:25:26,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:25:34,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:25:37,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:25:39,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:25:41,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:25:44,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:25:44,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:25:44,019 INFO L93 Difference]: Finished difference Result 419 states and 472 transitions. [2022-12-14 15:25:44,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 15:25:44,020 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-12-14 15:25:44,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:25:44,021 INFO L225 Difference]: With dead ends: 419 [2022-12-14 15:25:44,021 INFO L226 Difference]: Without dead ends: 419 [2022-12-14 15:25:44,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=85, Invalid=149, Unknown=6, NotChecked=0, Total=240 [2022-12-14 15:25:44,022 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 527 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 65 mSolverCounterUnsat, 155 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 155 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.8s IncrementalHoareTripleChecker+Time [2022-12-14 15:25:44,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 436 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 564 Invalid, 155 Unknown, 0 Unchecked, 25.8s Time] [2022-12-14 15:25:44,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-12-14 15:25:44,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 350. [2022-12-14 15:25:44,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 208 states have (on average 1.7211538461538463) internal successors, (358), 322 states have internal predecessors, (358), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (29), 20 states have call predecessors, (29), 18 states have call successors, (29) [2022-12-14 15:25:44,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 405 transitions. [2022-12-14 15:25:44,026 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 405 transitions. Word has length 21 [2022-12-14 15:25:44,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:25:44,027 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 405 transitions. [2022-12-14 15:25:44,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 15:25:44,027 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 405 transitions. [2022-12-14 15:25:44,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 15:25:44,027 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:25:44,027 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, 1] [2022-12-14 15:25:44,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-14 15:25:44,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-12-14 15:25:44,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2022-12-14 15:25:44,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 15:25:44,630 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr91REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:25:44,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:25:44,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1415040467, now seen corresponding path program 1 times [2022-12-14 15:25:44,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:25:44,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345141549] [2022-12-14 15:25:44,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:25:44,632 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:25:44,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:25:44,635 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:25:44,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-12-14 15:25:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:25:44,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 15:25:44,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:25:44,789 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:25:44,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:25:44,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:25:44,812 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:25:44,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345141549] [2022-12-14 15:25:44,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345141549] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:25:44,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:25:44,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:25:44,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467989838] [2022-12-14 15:25:44,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:25:44,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:25:44,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:25:44,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:25:44,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:25:44,814 INFO L87 Difference]: Start difference. First operand 350 states and 405 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 15:25:45,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:25:45,398 INFO L93 Difference]: Finished difference Result 390 states and 447 transitions. [2022-12-14 15:25:45,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:25:45,399 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-12-14 15:25:45,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:25:45,400 INFO L225 Difference]: With dead ends: 390 [2022-12-14 15:25:45,400 INFO L226 Difference]: Without dead ends: 390 [2022-12-14 15:25:45,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:25:45,400 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 59 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 15:25:45,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1036 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 15:25:45,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-12-14 15:25:45,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 352. [2022-12-14 15:25:45,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 210 states have (on average 1.7190476190476192) internal successors, (361), 324 states have internal predecessors, (361), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (29), 20 states have call predecessors, (29), 18 states have call successors, (29) [2022-12-14 15:25:45,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 408 transitions. [2022-12-14 15:25:45,405 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 408 transitions. Word has length 23 [2022-12-14 15:25:45,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:25:45,405 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 408 transitions. [2022-12-14 15:25:45,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 15:25:45,405 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 408 transitions. [2022-12-14 15:25:45,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 15:25:45,406 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:25:45,406 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, 1] [2022-12-14 15:25:45,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-12-14 15:25:45,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:25:45,606 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:25:45,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:25:45,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1415040466, now seen corresponding path program 1 times [2022-12-14 15:25:45,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:25:45,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498268647] [2022-12-14 15:25:45,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:25:45,607 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:25:45,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:25:45,608 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:25:45,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-12-14 15:25:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:25:45,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 15:25:45,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:25:45,914 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:25:45,922 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:25:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:25:45,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:25:45,963 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:25:45,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498268647] [2022-12-14 15:25:45,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1498268647] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:25:45,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:25:45,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:25:45,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670505644] [2022-12-14 15:25:45,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:25:45,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:25:45,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:25:45,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:25:45,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:25:45,964 INFO L87 Difference]: Start difference. First operand 352 states and 408 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 15:25:46,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:25:46,791 INFO L93 Difference]: Finished difference Result 375 states and 432 transitions. [2022-12-14 15:25:46,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:25:46,792 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-12-14 15:25:46,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:25:46,793 INFO L225 Difference]: With dead ends: 375 [2022-12-14 15:25:46,793 INFO L226 Difference]: Without dead ends: 375 [2022-12-14 15:25:46,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:25:46,794 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 41 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 15:25:46,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1075 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 15:25:46,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-12-14 15:25:46,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 352. [2022-12-14 15:25:46,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 210 states have (on average 1.7142857142857142) internal successors, (360), 324 states have internal predecessors, (360), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (29), 20 states have call predecessors, (29), 18 states have call successors, (29) [2022-12-14 15:25:46,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 407 transitions. [2022-12-14 15:25:46,798 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 407 transitions. Word has length 23 [2022-12-14 15:25:46,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:25:46,799 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 407 transitions. [2022-12-14 15:25:46,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 15:25:46,799 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 407 transitions. [2022-12-14 15:25:46,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 15:25:46,799 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:25:46,799 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:25:46,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-12-14 15:25:47,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:25:47,000 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr83ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:25:47,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:25:47,001 INFO L85 PathProgramCache]: Analyzing trace with hash -412937067, now seen corresponding path program 1 times [2022-12-14 15:25:47,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:25:47,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2023681567] [2022-12-14 15:25:47,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:25:47,002 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:25:47,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:25:47,003 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:25:47,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-12-14 15:25:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:25:47,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:25:47,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:25:47,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:25:47,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:25:47,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:25:47,194 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:25:47,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2023681567] [2022-12-14 15:25:47,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2023681567] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:25:47,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [11632296] [2022-12-14 15:25:47,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:25:47,194 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:25:47,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:25:47,195 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:25:47,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-12-14 15:25:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:25:47,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:25:47,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:25:47,302 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:25:47,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:25:47,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:25:47,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [11632296] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:25:47,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361899862] [2022-12-14 15:25:47,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:25:47,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:25:47,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:25:47,329 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:25:47,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-14 15:25:47,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:25:47,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:25:47,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:25:47,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:25:47,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:25:47,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:25:47,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361899862] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:25:47,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:25:47,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 4 [2022-12-14 15:25:47,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817598721] [2022-12-14 15:25:47,441 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:25:47,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:25:47,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:25:47,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:25:47,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:25:47,441 INFO L87 Difference]: Start difference. First operand 352 states and 407 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 15:25:47,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:25:47,499 INFO L93 Difference]: Finished difference Result 351 states and 406 transitions. [2022-12-14 15:25:47,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:25:47,499 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-12-14 15:25:47,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:25:47,500 INFO L225 Difference]: With dead ends: 351 [2022-12-14 15:25:47,500 INFO L226 Difference]: Without dead ends: 351 [2022-12-14 15:25:47,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:25:47,500 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 245 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:25:47,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 1046 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:25:47,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-12-14 15:25:47,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2022-12-14 15:25:47,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 210 states have (on average 1.7095238095238094) internal successors, (359), 323 states have internal predecessors, (359), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (29), 20 states have call predecessors, (29), 18 states have call successors, (29) [2022-12-14 15:25:47,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 406 transitions. [2022-12-14 15:25:47,505 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 406 transitions. Word has length 25 [2022-12-14 15:25:47,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:25:47,505 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 406 transitions. [2022-12-14 15:25:47,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 15:25:47,505 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 406 transitions. [2022-12-14 15:25:47,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 15:25:47,505 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:25:47,505 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:25:47,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-12-14 15:25:47,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2022-12-14 15:25:47,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-12-14 15:25:48,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:25:48,108 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:25:48,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:25:48,109 INFO L85 PathProgramCache]: Analyzing trace with hash -412937301, now seen corresponding path program 1 times [2022-12-14 15:25:48,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:25:48,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725016661] [2022-12-14 15:25:48,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:25:48,110 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:25:48,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:25:48,113 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:25:48,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-12-14 15:25:48,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:25:48,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 15:25:48,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:25:48,291 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:25:48,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:25:48,291 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:25:48,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725016661] [2022-12-14 15:25:48,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1725016661] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:25:48,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:25:48,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 15:25:48,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675204758] [2022-12-14 15:25:48,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:25:48,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:25:48,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:25:48,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:25:48,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:25:48,292 INFO L87 Difference]: Start difference. First operand 351 states and 406 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 15:25:48,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:25:48,335 INFO L93 Difference]: Finished difference Result 392 states and 444 transitions. [2022-12-14 15:25:48,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:25:48,335 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-12-14 15:25:48,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:25:48,336 INFO L225 Difference]: With dead ends: 392 [2022-12-14 15:25:48,336 INFO L226 Difference]: Without dead ends: 392 [2022-12-14 15:25:48,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:25:48,337 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 43 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1426 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:25:48,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 1426 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:25:48,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-12-14 15:25:48,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 349. [2022-12-14 15:25:48,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 209 states have (on average 1.6985645933014355) internal successors, (355), 321 states have internal predecessors, (355), 17 states have call successors, (17), 9 states have call predecessors, (17), 11 states have return successors, (27), 20 states have call predecessors, (27), 17 states have call successors, (27) [2022-12-14 15:25:48,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 399 transitions. [2022-12-14 15:25:48,341 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 399 transitions. Word has length 25 [2022-12-14 15:25:48,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:25:48,341 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 399 transitions. [2022-12-14 15:25:48,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 15:25:48,341 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 399 transitions. [2022-12-14 15:25:48,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 15:25:48,342 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:25:48,342 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:25:48,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-12-14 15:25:48,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:25:48,543 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:25:48,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:25:48,544 INFO L85 PathProgramCache]: Analyzing trace with hash -441566452, now seen corresponding path program 1 times [2022-12-14 15:25:48,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:25:48,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [756108792] [2022-12-14 15:25:48,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:25:48,545 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:25:48,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:25:48,548 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:25:48,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-12-14 15:25:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:25:48,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:25:48,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:25:48,655 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:25:48,696 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)) |c_#valid|)) is different from true [2022-12-14 15:25:48,713 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:25:48,714 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:25:48,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2022-12-14 15:25:48,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:25:48,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:25:48,855 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:25:48,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [756108792] [2022-12-14 15:25:48,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [756108792] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:25:48,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1019583145] [2022-12-14 15:25:48,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:25:48,855 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:25:48,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:25:48,856 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:25:48,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-12-14 15:25:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:25:48,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 15:25:48,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:25:48,982 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:25:49,002 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_188 (_ BitVec 1))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_188) |c_#valid|)))) is different from true [2022-12-14 15:25:49,025 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:25:49,025 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:25:49,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2022-12-14 15:25:49,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:25:49,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:25:49,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1019583145] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:25:49,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291712438] [2022-12-14 15:25:49,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:25:49,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:25:49,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:25:49,157 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:25:49,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-14 15:25:49,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:25:49,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:25:49,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:25:49,222 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:25:49,243 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_206 (_ BitVec 1))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_206) |c_#valid|)))) is different from true [2022-12-14 15:25:49,267 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:25:49,268 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:25:49,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2022-12-14 15:25:49,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:25:49,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:25:49,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291712438] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:25:49,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:25:49,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6, 5, 6, 5] total 9 [2022-12-14 15:25:49,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232533353] [2022-12-14 15:25:49,393 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:25:49,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 15:25:49,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:25:49,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 15:25:49,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=33, Unknown=3, NotChecked=36, Total=90 [2022-12-14 15:25:49,394 INFO L87 Difference]: Start difference. First operand 349 states and 399 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 15:25:52,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:25:52,821 INFO L93 Difference]: Finished difference Result 379 states and 425 transitions. [2022-12-14 15:25:52,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:25:52,821 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 25 [2022-12-14 15:25:52,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:25:52,822 INFO L225 Difference]: With dead ends: 379 [2022-12-14 15:25:52,822 INFO L226 Difference]: Without dead ends: 379 [2022-12-14 15:25:52,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 127 SyntacticMatches, 9 SemanticMatches, 9 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=22, Invalid=43, Unknown=3, NotChecked=42, Total=110 [2022-12-14 15:25:52,823 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 225 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 1894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1155 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:25:52,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 854 Invalid, 1894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 694 Invalid, 0 Unknown, 1155 Unchecked, 1.4s Time] [2022-12-14 15:25:52,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-12-14 15:25:52,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 351. [2022-12-14 15:25:52,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 212 states have (on average 1.6886792452830188) internal successors, (358), 323 states have internal predecessors, (358), 17 states have call successors, (17), 9 states have call predecessors, (17), 11 states have return successors, (27), 20 states have call predecessors, (27), 17 states have call successors, (27) [2022-12-14 15:25:52,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 402 transitions. [2022-12-14 15:25:52,827 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 402 transitions. Word has length 25 [2022-12-14 15:25:52,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:25:52,827 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 402 transitions. [2022-12-14 15:25:52,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 15:25:52,827 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 402 transitions. [2022-12-14 15:25:52,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 15:25:52,828 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:25:52,828 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:25:52,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-12-14 15:25:53,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2022-12-14 15:25:53,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-14 15:25:53,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:25:53,429 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:25:53,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:25:53,431 INFO L85 PathProgramCache]: Analyzing trace with hash -441566451, now seen corresponding path program 1 times [2022-12-14 15:25:53,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:25:53,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254780832] [2022-12-14 15:25:53,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:25:53,432 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:25:53,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:25:53,435 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:25:53,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-12-14 15:25:53,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:25:53,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 15:25:53,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:25:53,527 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:25:53,636 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| |c_ldv_malloc_#in~size|) |c_#length|)) is different from true [2022-12-14 15:25:53,657 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 15:25:53,657 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:25:53,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-12-14 15:25:53,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:25:53,918 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:25:53,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254780832] [2022-12-14 15:25:53,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254780832] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:25:53,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [245037758] [2022-12-14 15:25:53,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:25:53,919 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:25:53,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:25:53,920 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:25:53,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-12-14 15:25:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:25:54,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 15:25:54,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:25:54,055 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:25:54,061 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:25:54,228 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_240 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_240) |c_#length|)))) is different from true [2022-12-14 15:25:54,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:25:54,244 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:25:54,257 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:25:54,258 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:25:54,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-12-14 15:25:54,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:25:58,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [245037758] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:25:58,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757456352] [2022-12-14 15:25:58,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:25:58,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:25:58,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:25:58,531 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:25:58,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-14 15:25:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:25:58,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 15:25:58,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:25:58,603 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:25:58,608 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:25:58,673 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_258 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_258) |c_#length|)))) is different from true [2022-12-14 15:25:58,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:25:58,693 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:25:58,706 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:25:58,706 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:25:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-12-14 15:25:58,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:26:02,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757456352] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:26:02,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:26:02,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-12-14 15:26:02,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016908178] [2022-12-14 15:26:02,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:26:02,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 15:26:02,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:26:02,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 15:26:02,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=172, Unknown=5, NotChecked=84, Total=306 [2022-12-14 15:26:02,887 INFO L87 Difference]: Start difference. First operand 351 states and 402 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 15:26:07,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:26:07,102 INFO L93 Difference]: Finished difference Result 681 states and 789 transitions. [2022-12-14 15:26:07,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 15:26:07,102 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 25 [2022-12-14 15:26:07,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:26:07,104 INFO L225 Difference]: With dead ends: 681 [2022-12-14 15:26:07,104 INFO L226 Difference]: Without dead ends: 681 [2022-12-14 15:26:07,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=56, Invalid=223, Unknown=5, NotChecked=96, Total=380 [2022-12-14 15:26:07,104 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 519 mSDsluCounter, 1760 mSDsCounter, 0 mSdLazyCounter, 2256 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 2036 SdHoareTripleChecker+Invalid, 3707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 2256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1393 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:26:07,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 2036 Invalid, 3707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 2256 Invalid, 0 Unknown, 1393 Unchecked, 4.0s Time] [2022-12-14 15:26:07,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-12-14 15:26:07,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 350. [2022-12-14 15:26:07,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 212 states have (on average 1.6839622641509433) internal successors, (357), 322 states have internal predecessors, (357), 17 states have call successors, (17), 9 states have call predecessors, (17), 11 states have return successors, (27), 20 states have call predecessors, (27), 17 states have call successors, (27) [2022-12-14 15:26:07,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 401 transitions. [2022-12-14 15:26:07,113 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 401 transitions. Word has length 25 [2022-12-14 15:26:07,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:26:07,113 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 401 transitions. [2022-12-14 15:26:07,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 15:26:07,113 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 401 transitions. [2022-12-14 15:26:07,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 15:26:07,114 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:26:07,114 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:26:07,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-12-14 15:26:07,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-12-14 15:26:07,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-12-14 15:26:07,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:26:07,715 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr84ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:26:07,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:26:07,716 INFO L85 PathProgramCache]: Analyzing trace with hash 83853234, now seen corresponding path program 1 times [2022-12-14 15:26:07,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:26:07,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184740015] [2022-12-14 15:26:07,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:26:07,716 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:26:07,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:26:07,717 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:26:07,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-12-14 15:26:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:26:07,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 15:26:07,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:26:08,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:26:08,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:26:08,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:26:08,158 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:26:08,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184740015] [2022-12-14 15:26:08,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184740015] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:26:08,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1712157139] [2022-12-14 15:26:08,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:26:08,158 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:26:08,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:26:08,159 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:26:08,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-12-14 15:26:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:26:08,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:26:08,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:26:08,277 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:26:08,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:26:08,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:26:08,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1712157139] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:26:08,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380535352] [2022-12-14 15:26:08,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:26:08,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:26:08,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:26:08,320 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:26:08,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-14 15:26:08,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:26:08,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:26:08,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:26:08,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:26:08,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:26:08,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:26:08,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380535352] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:26:08,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:26:08,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 5, 4] total 9 [2022-12-14 15:26:08,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729274868] [2022-12-14 15:26:08,484 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:26:08,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 15:26:08,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:26:08,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 15:26:08,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:26:08,485 INFO L87 Difference]: Start difference. First operand 350 states and 401 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 15:26:08,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:26:08,943 INFO L93 Difference]: Finished difference Result 349 states and 399 transitions. [2022-12-14 15:26:08,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:26:08,944 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 26 [2022-12-14 15:26:08,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:26:08,945 INFO L225 Difference]: With dead ends: 349 [2022-12-14 15:26:08,945 INFO L226 Difference]: Without dead ends: 349 [2022-12-14 15:26:08,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 139 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:26:08,945 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 537 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:26:08,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 944 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:26:08,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-12-14 15:26:08,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2022-12-14 15:26:08,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 212 states have (on average 1.6745283018867925) internal successors, (355), 321 states have internal predecessors, (355), 17 states have call successors, (17), 9 states have call predecessors, (17), 11 states have return successors, (27), 20 states have call predecessors, (27), 17 states have call successors, (27) [2022-12-14 15:26:08,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 399 transitions. [2022-12-14 15:26:08,950 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 399 transitions. Word has length 26 [2022-12-14 15:26:08,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:26:08,950 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 399 transitions. [2022-12-14 15:26:08,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 15:26:08,950 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 399 transitions. [2022-12-14 15:26:08,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 15:26:08,950 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:26:08,950 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, 1, 1, 1, 1] [2022-12-14 15:26:08,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-12-14 15:26:09,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2022-12-14 15:26:09,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-12-14 15:26:09,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:26:09,553 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr93REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:26:09,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:26:09,554 INFO L85 PathProgramCache]: Analyzing trace with hash -366162574, now seen corresponding path program 1 times [2022-12-14 15:26:09,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:26:09,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1216252479] [2022-12-14 15:26:09,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:26:09,554 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:26:09,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:26:09,555 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:26:09,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-12-14 15:26:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:26:09,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 15:26:09,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:26:09,844 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:26:09,850 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:26:09,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:26:09,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:26:09,911 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:26:09,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1216252479] [2022-12-14 15:26:09,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1216252479] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:26:09,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:26:09,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:26:09,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042778238] [2022-12-14 15:26:09,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:26:09,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:26:09,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:26:09,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:26:09,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:26:09,912 INFO L87 Difference]: Start difference. First operand 349 states and 399 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 15:26:10,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:26:10,311 INFO L93 Difference]: Finished difference Result 355 states and 404 transitions. [2022-12-14 15:26:10,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:26:10,312 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-12-14 15:26:10,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:26:10,313 INFO L225 Difference]: With dead ends: 355 [2022-12-14 15:26:10,313 INFO L226 Difference]: Without dead ends: 355 [2022-12-14 15:26:10,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:26:10,314 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 13 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1236 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:26:10,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1236 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:26:10,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-12-14 15:26:10,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 351. [2022-12-14 15:26:10,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 214 states have (on average 1.6682242990654206) internal successors, (357), 323 states have internal predecessors, (357), 17 states have call successors, (17), 9 states have call predecessors, (17), 11 states have return successors, (27), 20 states have call predecessors, (27), 17 states have call successors, (27) [2022-12-14 15:26:10,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 401 transitions. [2022-12-14 15:26:10,318 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 401 transitions. Word has length 26 [2022-12-14 15:26:10,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:26:10,318 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 401 transitions. [2022-12-14 15:26:10,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 15:26:10,318 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 401 transitions. [2022-12-14 15:26:10,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 15:26:10,319 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:26:10,319 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, 1, 1, 1, 1, 1, 1] [2022-12-14 15:26:10,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-12-14 15:26:10,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:26:10,520 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:26:10,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:26:10,521 INFO L85 PathProgramCache]: Analyzing trace with hash 305064464, now seen corresponding path program 1 times [2022-12-14 15:26:10,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:26:10,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1536946969] [2022-12-14 15:26:10,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:26:10,522 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:26:10,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:26:10,525 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:26:10,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-12-14 15:26:10,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:26:10,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 15:26:10,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:26:10,717 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_entry_point_~client~0#1.base| (_ BitVec 32))) (and (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 1))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base|)))) is different from true [2022-12-14 15:26:10,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:26:10,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:26:10,870 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret65#1.base_55| (_ BitVec 32))) (or (= |c_ULTIMATE.start_main_old_#valid#1| (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret65#1.base_55| (_ bv0 1))) (not (= (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret65#1.base_55|) (_ bv0 1))))) is different from false [2022-12-14 15:26:10,871 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:26:10,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1536946969] [2022-12-14 15:26:10,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1536946969] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:26:10,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1417064249] [2022-12-14 15:26:10,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:26:10,872 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:26:10,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:26:10,873 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:26:10,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-12-14 15:26:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:26:11,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 15:26:11,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:26:11,186 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_entry_point_~client~0#1.base| (_ BitVec 32))) (and (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 1))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base|)))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32)))) is different from true [2022-12-14 15:26:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:26:11,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:26:11,322 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret65#1.base_58| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret65#1.base_58|) (_ bv0 1))) (= |c_ULTIMATE.start_main_old_#valid#1| (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret65#1.base_58| (_ bv0 1))))) is different from false [2022-12-14 15:26:11,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1417064249] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:26:11,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634785091] [2022-12-14 15:26:11,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:26:11,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:26:11,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:26:11,324 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:26:11,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-14 15:26:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:26:11,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 15:26:11,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:26:11,438 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-12-14 15:26:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:26:11,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:26:11,595 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret65#1.base_61| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret65#1.base_61|))) (= (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret65#1.base_61| (_ bv0 1)) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2022-12-14 15:26:11,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634785091] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:26:11,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:26:11,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-14 15:26:11,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861515000] [2022-12-14 15:26:11,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:26:11,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 15:26:11,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:26:11,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 15:26:11,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=150, Unknown=5, NotChecked=140, Total=342 [2022-12-14 15:26:11,598 INFO L87 Difference]: Start difference. First operand 351 states and 401 transitions. Second operand has 16 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 15:26:14,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:26:14,547 INFO L93 Difference]: Finished difference Result 363 states and 412 transitions. [2022-12-14 15:26:14,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 15:26:14,548 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 28 [2022-12-14 15:26:14,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:26:14,549 INFO L225 Difference]: With dead ends: 363 [2022-12-14 15:26:14,549 INFO L226 Difference]: Without dead ends: 347 [2022-12-14 15:26:14,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 125 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 5 IntricatePredicates, 2 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=311, Unknown=5, NotChecked=200, Total=600 [2022-12-14 15:26:14,549 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 371 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 1364 SdHoareTripleChecker+Invalid, 1972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 682 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-14 15:26:14,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 1364 Invalid, 1972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1239 Invalid, 0 Unknown, 682 Unchecked, 2.8s Time] [2022-12-14 15:26:14,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-12-14 15:26:14,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 345. [2022-12-14 15:26:14,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 209 states have (on average 1.6794258373205742) internal successors, (351), 319 states have internal predecessors, (351), 17 states have call successors, (17), 8 states have call predecessors, (17), 10 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2022-12-14 15:26:14,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 394 transitions. [2022-12-14 15:26:14,555 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 394 transitions. Word has length 28 [2022-12-14 15:26:14,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:26:14,555 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 394 transitions. [2022-12-14 15:26:14,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 15:26:14,555 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 394 transitions. [2022-12-14 15:26:14,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 15:26:14,555 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:26:14,555 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 15:26:14,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-12-14 15:26:14,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2022-12-14 15:26:14,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-12-14 15:26:15,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:26:15,158 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:26:15,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:26:15,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1048245233, now seen corresponding path program 1 times [2022-12-14 15:26:15,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:26:15,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730024847] [2022-12-14 15:26:15,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:26:15,160 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:26:15,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:26:15,163 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:26:15,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-12-14 15:26:15,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:26:15,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:26:15,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:26:15,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:26:15,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:26:15,264 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:26:15,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730024847] [2022-12-14 15:26:15,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730024847] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:26:15,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:26:15,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 15:26:15,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302314599] [2022-12-14 15:26:15,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:26:15,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:26:15,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:26:15,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:26:15,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:26:15,265 INFO L87 Difference]: Start difference. First operand 345 states and 394 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 15:26:15,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:26:15,320 INFO L93 Difference]: Finished difference Result 336 states and 384 transitions. [2022-12-14 15:26:15,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:26:15,321 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-12-14 15:26:15,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:26:15,322 INFO L225 Difference]: With dead ends: 336 [2022-12-14 15:26:15,322 INFO L226 Difference]: Without dead ends: 336 [2022-12-14 15:26:15,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:26:15,322 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 245 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:26:15,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 1053 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:26:15,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-12-14 15:26:15,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 336. [2022-12-14 15:26:15,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 200 states have (on average 1.705) internal successors, (341), 310 states have internal predecessors, (341), 17 states have call successors, (17), 8 states have call predecessors, (17), 10 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2022-12-14 15:26:15,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 384 transitions. [2022-12-14 15:26:15,328 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 384 transitions. Word has length 28 [2022-12-14 15:26:15,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:26:15,329 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 384 transitions. [2022-12-14 15:26:15,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 15:26:15,329 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 384 transitions. [2022-12-14 15:26:15,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 15:26:15,329 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:26:15,329 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:26:15,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-12-14 15:26:15,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:26:15,530 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr88ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:26:15,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:26:15,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1975256279, now seen corresponding path program 1 times [2022-12-14 15:26:15,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:26:15,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [645346845] [2022-12-14 15:26:15,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:26:15,531 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:26:15,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:26:15,531 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:26:15,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-12-14 15:26:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:26:15,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 15:26:15,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:26:15,599 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:26:15,654 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:26:15,654 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:26:15,739 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:26:15,748 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:26:15,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:26:15,874 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 6 [2022-12-14 15:26:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:26:15,963 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:26:15,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [645346845] [2022-12-14 15:26:15,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [645346845] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:26:15,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [638213088] [2022-12-14 15:26:15,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:26:15,964 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:26:15,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:26:15,964 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:26:15,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-12-14 15:26:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:26:16,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 15:26:16,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:26:16,114 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:26:16,143 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:26:16,143 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:26:16,194 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:26:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:26:16,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:26:16,329 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 6 [2022-12-14 15:26:16,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:26:16,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [638213088] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:26:16,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567925454] [2022-12-14 15:26:16,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:26:16,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:26:16,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:26:16,428 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:26:16,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-14 15:26:16,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:26:16,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 15:26:16,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:26:16,522 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:26:16,546 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:26:16,546 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:26:16,590 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:26:16,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:26:16,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:26:16,723 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 6 [2022-12-14 15:26:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:26:16,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567925454] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:26:16,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:26:16,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 10 [2022-12-14 15:26:16,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972384295] [2022-12-14 15:26:16,810 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:26:16,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 15:26:16,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:26:16,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 15:26:16,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-12-14 15:26:16,810 INFO L87 Difference]: Start difference. First operand 336 states and 384 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 15:26:18,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:26:18,896 INFO L93 Difference]: Finished difference Result 363 states and 407 transitions. [2022-12-14 15:26:18,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 15:26:18,897 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2022-12-14 15:26:18,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:26:18,898 INFO L225 Difference]: With dead ends: 363 [2022-12-14 15:26:18,898 INFO L226 Difference]: Without dead ends: 363 [2022-12-14 15:26:18,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 151 SyntacticMatches, 14 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-12-14 15:26:18,898 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 313 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1509 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:26:18,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 1509 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1234 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 15:26:18,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-12-14 15:26:18,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 339. [2022-12-14 15:26:18,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 203 states have (on average 1.6945812807881773) internal successors, (344), 313 states have internal predecessors, (344), 17 states have call successors, (17), 8 states have call predecessors, (17), 10 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2022-12-14 15:26:18,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 387 transitions. [2022-12-14 15:26:18,902 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 387 transitions. Word has length 30 [2022-12-14 15:26:18,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:26:18,902 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 387 transitions. [2022-12-14 15:26:18,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 15:26:18,902 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 387 transitions. [2022-12-14 15:26:18,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 15:26:18,903 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:26:18,903 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:26:18,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-12-14 15:26:19,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-12-14 15:26:19,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2022-12-14 15:26:19,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 15:26:19,505 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:26:19,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:26:19,506 INFO L85 PathProgramCache]: Analyzing trace with hash -154246822, now seen corresponding path program 1 times [2022-12-14 15:26:19,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:26:19,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [591464568] [2022-12-14 15:26:19,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:26:19,507 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:26:19,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:26:19,510 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:26:19,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-12-14 15:26:19,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:26:19,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 15:26:19,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:26:19,676 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:26:19,676 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:26:19,768 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:26:19,768 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:26:19,874 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:26:19,895 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:26:19,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:26:19,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:26:19,990 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:26:19,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [591464568] [2022-12-14 15:26:19,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [591464568] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:26:19,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2076400257] [2022-12-14 15:26:19,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:26:19,991 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:26:19,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:26:19,992 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:26:19,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-12-14 15:26:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:26:20,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 15:26:20,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:26:20,150 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 3 [2022-12-14 15:26:20,199 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:26:20,200 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:26:20,293 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:26:20,293 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:26:20,499 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 18 [2022-12-14 15:26:20,626 INFO L321 Elim1Store]: treesize reduction 32, result has 27.3 percent of original size [2022-12-14 15:26:20,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 39 [2022-12-14 15:26:20,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:26:20,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:26:20,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2076400257] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:26:20,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969481784] [2022-12-14 15:26:20,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:26:20,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:26:20,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:26:20,859 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:26:20,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-12-14 15:26:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:26:20,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 15:26:20,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:26:20,982 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:26:20,982 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:26:21,043 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:26:21,043 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:26:21,127 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:26:21,146 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:26:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:26:21,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:26:21,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969481784] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:26:21,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:26:21,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 7] total 13 [2022-12-14 15:26:21,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693537040] [2022-12-14 15:26:21,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:26:21,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 15:26:21,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:26:21,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 15:26:21,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2022-12-14 15:26:21,232 INFO L87 Difference]: Start difference. First operand 339 states and 387 transitions. Second operand has 15 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 15:26:25,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:26:27,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:26:29,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:26:31,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:26:33,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:26:35,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:26:37,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:26:39,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:26:41,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:26:44,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:26:46,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:26:49,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:26:51,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:26:53,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:26:55,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:26:57,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:26:59,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:27:01,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:27:03,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:27:05,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:27:07,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:27:09,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:27:11,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:27:13,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:27:15,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:27:17,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:27:20,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:27:22,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:27:24,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:27:26,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:27:28,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:27:30,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:27:32,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:27:34,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:27:36,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:27:38,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:27:40,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:27:42,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:27:45,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:27:47,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:27:49,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:27:51,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:27:53,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:27:55,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:27:57,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:27:59,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:28:02,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:28:04,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:28:06,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:28:06,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:28:06,418 INFO L93 Difference]: Finished difference Result 418 states and 466 transitions. [2022-12-14 15:28:06,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 15:28:06,419 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 32 [2022-12-14 15:28:06,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:28:06,420 INFO L225 Difference]: With dead ends: 418 [2022-12-14 15:28:06,420 INFO L226 Difference]: Without dead ends: 418 [2022-12-14 15:28:06,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 100 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=162, Invalid=487, Unknown=1, NotChecked=0, Total=650 [2022-12-14 15:28:06,420 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 336 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 86 mSolverCounterUnsat, 49 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 102.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 1427 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 49 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 103.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:28:06,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 1427 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1316 Invalid, 49 Unknown, 0 Unchecked, 103.0s Time] [2022-12-14 15:28:06,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-12-14 15:28:06,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 341. [2022-12-14 15:28:06,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 205 states have (on average 1.6878048780487804) internal successors, (346), 315 states have internal predecessors, (346), 17 states have call successors, (17), 8 states have call predecessors, (17), 10 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2022-12-14 15:28:06,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 389 transitions. [2022-12-14 15:28:06,424 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 389 transitions. Word has length 32 [2022-12-14 15:28:06,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:28:06,424 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 389 transitions. [2022-12-14 15:28:06,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 15:28:06,424 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 389 transitions. [2022-12-14 15:28:06,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 15:28:06,425 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:28:06,425 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:28:06,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-12-14 15:28:06,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2022-12-14 15:28:06,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-12-14 15:28:07,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:28:07,027 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr80ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:28:07,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:28:07,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1682263433, now seen corresponding path program 1 times [2022-12-14 15:28:07,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:28:07,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229011379] [2022-12-14 15:28:07,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:07,030 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:28:07,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:28:07,033 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:28:07,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-12-14 15:28:07,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:07,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:28:07,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:28:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:28:07,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:28:07,176 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:28:07,176 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:28:07,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229011379] [2022-12-14 15:28:07,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229011379] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:28:07,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1153213501] [2022-12-14 15:28:07,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:07,177 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:28:07,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:28:07,178 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:28:07,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-12-14 15:28:07,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:07,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:28:07,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:28:07,303 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:28:07,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:28:07,334 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:28:07,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1153213501] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:28:07,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780244449] [2022-12-14 15:28:07,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:07,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:28:07,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:28:07,336 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:28:07,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-12-14 15:28:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:07,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:28:07,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:28:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:28:07,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:28:07,456 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:28:07,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780244449] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:28:07,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:28:07,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 4 [2022-12-14 15:28:07,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669021970] [2022-12-14 15:28:07,456 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:28:07,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:28:07,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:28:07,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:28:07,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:28:07,458 INFO L87 Difference]: Start difference. First operand 341 states and 389 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 15:28:07,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:28:07,505 INFO L93 Difference]: Finished difference Result 340 states and 388 transitions. [2022-12-14 15:28:07,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:28:07,506 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2022-12-14 15:28:07,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:28:07,508 INFO L225 Difference]: With dead ends: 340 [2022-12-14 15:28:07,508 INFO L226 Difference]: Without dead ends: 340 [2022-12-14 15:28:07,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:28:07,509 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 237 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:28:07,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 1041 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:28:07,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-12-14 15:28:07,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2022-12-14 15:28:07,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 205 states have (on average 1.6829268292682926) internal successors, (345), 314 states have internal predecessors, (345), 17 states have call successors, (17), 8 states have call predecessors, (17), 10 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2022-12-14 15:28:07,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 388 transitions. [2022-12-14 15:28:07,514 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 388 transitions. Word has length 33 [2022-12-14 15:28:07,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:28:07,514 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 388 transitions. [2022-12-14 15:28:07,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 15:28:07,514 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 388 transitions. [2022-12-14 15:28:07,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 15:28:07,514 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:28:07,514 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:28:07,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-12-14 15:28:07,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-12-14 15:28:07,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (55)] Ended with exit code 0 [2022-12-14 15:28:08,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 15:28:08,117 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:28:08,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:28:08,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1653634066, now seen corresponding path program 1 times [2022-12-14 15:28:08,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:28:08,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302273316] [2022-12-14 15:28:08,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:08,119 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:28:08,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:28:08,121 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:28:08,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-12-14 15:28:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:08,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 15:28:08,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:28:08,250 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:08,255 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:08,353 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_490 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_490) |c_#length|)))) is different from true [2022-12-14 15:28:08,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:28:08,370 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:08,381 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:28:08,381 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:08,428 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_492 (_ BitVec 1))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_492) |c_#valid|)) (exists ((v_ArrVal_491 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_491))))) is different from true [2022-12-14 15:28:08,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:28:08,447 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:08,468 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:28:08,469 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:08,505 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_493 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_493))))) is different from true [2022-12-14 15:28:08,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:28:08,518 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:08,526 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:28:08,526 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:08,537 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 12 not checked. [2022-12-14 15:28:08,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:28:08,778 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:28:08,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302273316] [2022-12-14 15:28:08,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302273316] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:28:08,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1750650411] [2022-12-14 15:28:08,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:08,779 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:28:08,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:28:08,780 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:28:08,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-12-14 15:28:08,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:08,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 15:28:08,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:28:08,943 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:08,950 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:09,035 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:28:09,035 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:09,044 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:09,106 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_521 (_ BitVec 1))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_521) |c_#valid|)) (exists ((v_ArrVal_520 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_520) |c_#length|)))) is different from true [2022-12-14 15:28:09,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:28:09,125 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:09,145 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:28:09,145 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:09,193 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_522 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_522) |c_#length|)))) is different from true [2022-12-14 15:28:09,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:28:09,207 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:09,216 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:28:09,216 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:09,225 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 10 not checked. [2022-12-14 15:28:09,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:28:11,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1750650411] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:28:11,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335929743] [2022-12-14 15:28:11,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:11,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:28:11,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:28:11,367 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:28:11,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-12-14 15:28:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:11,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 15:28:11,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:28:11,466 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:11,474 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:11,519 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_548 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_548) |c_#length|)))) is different from true [2022-12-14 15:28:11,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:28:11,536 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:11,548 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:28:11,549 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:11,577 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_550 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_550))) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_549 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_549) |c_#length|)))) is different from true [2022-12-14 15:28:11,622 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:28:11,622 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:11,631 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:11,668 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_551 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_551))))) is different from true [2022-12-14 15:28:11,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:28:11,680 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:11,690 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:28:11,690 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:11,700 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 12 not checked. [2022-12-14 15:28:11,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:28:11,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335929743] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:28:11,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:28:11,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-12-14 15:28:11,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464016478] [2022-12-14 15:28:11,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:28:11,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 15:28:11,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:28:11,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 15:28:11,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=8, NotChecked=216, Total=380 [2022-12-14 15:28:11,843 INFO L87 Difference]: Start difference. First operand 340 states and 388 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 10 states have return successors, (10), 4 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 15:28:14,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:28:14,954 INFO L93 Difference]: Finished difference Result 361 states and 405 transitions. [2022-12-14 15:28:14,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 15:28:14,955 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 10 states have return successors, (10), 4 states have call predecessors, (10), 2 states have call successors, (10) Word has length 33 [2022-12-14 15:28:14,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:28:14,956 INFO L225 Difference]: With dead ends: 361 [2022-12-14 15:28:14,956 INFO L226 Difference]: Without dead ends: 361 [2022-12-14 15:28:14,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=59, Invalid=175, Unknown=8, NotChecked=264, Total=506 [2022-12-14 15:28:14,956 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 315 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 1427 mSolverCounterSat, 32 mSolverCounterUnsat, 62 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 4489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1427 IncrementalHoareTripleChecker+Invalid, 62 IncrementalHoareTripleChecker+Unknown, 2968 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-12-14 15:28:14,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 1012 Invalid, 4489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1427 Invalid, 62 Unknown, 2968 Unchecked, 2.9s Time] [2022-12-14 15:28:14,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-12-14 15:28:14,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 331. [2022-12-14 15:28:14,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 199 states have (on average 1.6834170854271358) internal successors, (335), 307 states have internal predecessors, (335), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (24), 17 states have call predecessors, (24), 16 states have call successors, (24) [2022-12-14 15:28:14,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 375 transitions. [2022-12-14 15:28:14,960 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 375 transitions. Word has length 33 [2022-12-14 15:28:14,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:28:14,960 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 375 transitions. [2022-12-14 15:28:14,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 10 states have return successors, (10), 4 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 15:28:14,960 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 375 transitions. [2022-12-14 15:28:14,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 15:28:14,960 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:28:14,960 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:28:14,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (58)] Ended with exit code 0 [2022-12-14 15:28:15,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-12-14 15:28:15,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-12-14 15:28:15,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:28:15,563 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr81ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:28:15,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:28:15,564 INFO L85 PathProgramCache]: Analyzing trace with hash 610559287, now seen corresponding path program 1 times [2022-12-14 15:28:15,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:28:15,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976754602] [2022-12-14 15:28:15,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:15,565 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:28:15,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:28:15,568 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:28:15,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-12-14 15:28:15,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:15,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 15:28:15,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:28:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:28:16,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:28:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:28:16,105 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:28:16,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976754602] [2022-12-14 15:28:16,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976754602] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:28:16,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1263244956] [2022-12-14 15:28:16,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:16,105 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:28:16,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:28:16,106 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:28:16,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-12-14 15:28:16,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:16,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:28:16,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:28:16,249 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:28:16,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:28:16,285 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:28:16,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1263244956] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:28:16,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216653289] [2022-12-14 15:28:16,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:16,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:28:16,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:28:16,287 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:28:16,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-12-14 15:28:16,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:16,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:28:16,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:28:16,412 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:28:16,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:28:16,458 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:28:16,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216653289] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:28:16,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:28:16,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 5, 4] total 9 [2022-12-14 15:28:16,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095841159] [2022-12-14 15:28:16,458 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:28:16,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 15:28:16,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:28:16,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 15:28:16,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:28:16,459 INFO L87 Difference]: Start difference. First operand 331 states and 375 transitions. Second operand has 10 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-12-14 15:28:17,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:28:17,092 INFO L93 Difference]: Finished difference Result 332 states and 376 transitions. [2022-12-14 15:28:17,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:28:17,093 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 34 [2022-12-14 15:28:17,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:28:17,094 INFO L225 Difference]: With dead ends: 332 [2022-12-14 15:28:17,094 INFO L226 Difference]: Without dead ends: 332 [2022-12-14 15:28:17,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 187 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:28:17,094 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 281 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 15:28:17,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 1215 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 15:28:17,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-12-14 15:28:17,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 330. [2022-12-14 15:28:17,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 199 states have (on average 1.678391959798995) internal successors, (334), 306 states have internal predecessors, (334), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (24), 17 states have call predecessors, (24), 16 states have call successors, (24) [2022-12-14 15:28:17,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 374 transitions. [2022-12-14 15:28:17,098 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 374 transitions. Word has length 34 [2022-12-14 15:28:17,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:28:17,098 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 374 transitions. [2022-12-14 15:28:17,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-12-14 15:28:17,098 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 374 transitions. [2022-12-14 15:28:17,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 15:28:17,098 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:28:17,098 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:28:17,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Ended with exit code 0 [2022-12-14 15:28:17,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (61)] Ended with exit code 0 [2022-12-14 15:28:17,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-12-14 15:28:17,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:28:17,701 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr91REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:28:17,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:28:17,702 INFO L85 PathProgramCache]: Analyzing trace with hash 2092671515, now seen corresponding path program 1 times [2022-12-14 15:28:17,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:28:17,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897233295] [2022-12-14 15:28:17,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:17,703 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:28:17,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:28:17,706 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:28:17,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-12-14 15:28:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:17,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 15:28:17,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:28:18,008 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 15:28:18,008 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:28:18,016 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:18,134 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-12-14 15:28:18,190 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:28:18,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:28:18,305 INFO L321 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2022-12-14 15:28:18,305 INFO L350 Elim1Store]: Elim1 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 32 treesize of output 31 [2022-12-14 15:28:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:28:18,480 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:28:18,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897233295] [2022-12-14 15:28:18,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897233295] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 15:28:18,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:28:18,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2022-12-14 15:28:18,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220603292] [2022-12-14 15:28:18,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:28:18,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:28:18,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:28:18,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:28:18,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-12-14 15:28:18,481 INFO L87 Difference]: Start difference. First operand 330 states and 374 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 15:28:19,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:28:19,677 INFO L93 Difference]: Finished difference Result 370 states and 416 transitions. [2022-12-14 15:28:19,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 15:28:19,678 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2022-12-14 15:28:19,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:28:19,679 INFO L225 Difference]: With dead ends: 370 [2022-12-14 15:28:19,679 INFO L226 Difference]: Without dead ends: 370 [2022-12-14 15:28:19,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-12-14 15:28:19,680 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 105 mSDsluCounter, 1139 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:28:19,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 1449 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 15:28:19,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-12-14 15:28:19,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 332. [2022-12-14 15:28:19,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 201 states have (on average 1.6766169154228856) internal successors, (337), 308 states have internal predecessors, (337), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (24), 17 states have call predecessors, (24), 16 states have call successors, (24) [2022-12-14 15:28:19,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 377 transitions. [2022-12-14 15:28:19,683 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 377 transitions. Word has length 34 [2022-12-14 15:28:19,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:28:19,683 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 377 transitions. [2022-12-14 15:28:19,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 15:28:19,683 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 377 transitions. [2022-12-14 15:28:19,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 15:28:19,684 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:28:19,684 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:28:19,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-12-14 15:28:19,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:28:19,885 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:28:19,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:28:19,886 INFO L85 PathProgramCache]: Analyzing trace with hash 2092671516, now seen corresponding path program 1 times [2022-12-14 15:28:19,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:28:19,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655266226] [2022-12-14 15:28:19,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:19,887 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:28:19,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:28:19,890 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:28:19,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-12-14 15:28:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:19,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 15:28:19,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:28:20,225 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 15:28:20,225 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:28:20,233 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:20,257 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 15:28:20,257 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:28:20,266 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:20,521 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-12-14 15:28:20,629 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:20,636 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:20,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:28:20,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:28:20,827 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 15:28:20,827 INFO L350 Elim1Store]: Elim1 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 38 treesize of output 42 [2022-12-14 15:28:20,986 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 10 [2022-12-14 15:28:21,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:28:21,641 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:28:21,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [655266226] [2022-12-14 15:28:21,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [655266226] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 15:28:21,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:28:21,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2022-12-14 15:28:21,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130221767] [2022-12-14 15:28:21,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:28:21,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:28:21,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:28:21,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:28:21,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-12-14 15:28:21,643 INFO L87 Difference]: Start difference. First operand 332 states and 377 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 15:28:24,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:28:24,342 INFO L93 Difference]: Finished difference Result 370 states and 416 transitions. [2022-12-14 15:28:24,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 15:28:24,343 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2022-12-14 15:28:24,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:28:24,344 INFO L225 Difference]: With dead ends: 370 [2022-12-14 15:28:24,344 INFO L226 Difference]: Without dead ends: 370 [2022-12-14 15:28:24,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-12-14 15:28:24,345 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 139 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1505 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-12-14 15:28:24,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 1505 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-12-14 15:28:24,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-12-14 15:28:24,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 332. [2022-12-14 15:28:24,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 201 states have (on average 1.671641791044776) internal successors, (336), 308 states have internal predecessors, (336), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (24), 17 states have call predecessors, (24), 16 states have call successors, (24) [2022-12-14 15:28:24,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 376 transitions. [2022-12-14 15:28:24,348 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 376 transitions. Word has length 34 [2022-12-14 15:28:24,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:28:24,348 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 376 transitions. [2022-12-14 15:28:24,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 15:28:24,348 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 376 transitions. [2022-12-14 15:28:24,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 15:28:24,348 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:28:24,348 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2022-12-14 15:28:24,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Ended with exit code 0 [2022-12-14 15:28:24,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:28:24,550 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr82ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:28:24,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:28:24,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1747469131, now seen corresponding path program 1 times [2022-12-14 15:28:24,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:28:24,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [998832438] [2022-12-14 15:28:24,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:24,552 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:28:24,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:28:24,555 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:28:24,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-12-14 15:28:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:24,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 15:28:24,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:28:24,768 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:24,814 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:28:24,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:28:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:28:24,897 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:28:24,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [998832438] [2022-12-14 15:28:24,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [998832438] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:28:24,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1037036043] [2022-12-14 15:28:24,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:24,898 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:28:24,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:28:24,898 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:28:24,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2022-12-14 15:28:25,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:25,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 15:28:25,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:28:25,038 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:28:25,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:28:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:28:25,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1037036043] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:28:25,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846652495] [2022-12-14 15:28:25,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:25,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:28:25,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:28:25,139 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:28:25,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-12-14 15:28:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:25,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 15:28:25,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:28:25,248 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:28:25,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:28:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:28:25,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846652495] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:28:25,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:28:25,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 6 [2022-12-14 15:28:25,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014377307] [2022-12-14 15:28:25,345 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:28:25,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:28:25,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:28:25,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:28:25,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:28:25,345 INFO L87 Difference]: Start difference. First operand 332 states and 376 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 15:28:26,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:28:26,816 INFO L93 Difference]: Finished difference Result 356 states and 396 transitions. [2022-12-14 15:28:26,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:28:26,817 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2022-12-14 15:28:26,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:28:26,818 INFO L225 Difference]: With dead ends: 356 [2022-12-14 15:28:26,818 INFO L226 Difference]: Without dead ends: 356 [2022-12-14 15:28:26,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 197 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:28:26,818 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 207 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:28:26,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 841 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 15:28:26,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-12-14 15:28:26,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 335. [2022-12-14 15:28:26,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 204 states have (on average 1.661764705882353) internal successors, (339), 311 states have internal predecessors, (339), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (24), 17 states have call predecessors, (24), 16 states have call successors, (24) [2022-12-14 15:28:26,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 379 transitions. [2022-12-14 15:28:26,822 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 379 transitions. Word has length 35 [2022-12-14 15:28:26,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:28:26,822 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 379 transitions. [2022-12-14 15:28:26,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 15:28:26,822 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 379 transitions. [2022-12-14 15:28:26,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 15:28:26,822 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:28:26,822 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:28:26,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (66)] Ended with exit code 0 [2022-12-14 15:28:27,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-12-14 15:28:27,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Ended with exit code 0 [2022-12-14 15:28:27,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:28:27,425 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr93REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:28:27,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:28:27,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1327181508, now seen corresponding path program 1 times [2022-12-14 15:28:27,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:28:27,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003111689] [2022-12-14 15:28:27,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:27,427 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:28:27,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:28:27,428 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:28:27,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-12-14 15:28:27,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:27,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:28:27,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:28:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:28:27,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:28:27,618 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:28:27,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003111689] [2022-12-14 15:28:27,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003111689] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:28:27,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:28:27,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:28:27,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692085665] [2022-12-14 15:28:27,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:28:27,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:28:27,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:28:27,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:28:27,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:28:27,619 INFO L87 Difference]: Start difference. First operand 335 states and 379 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 15:28:28,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:28:28,016 INFO L93 Difference]: Finished difference Result 353 states and 399 transitions. [2022-12-14 15:28:28,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:28:28,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-12-14 15:28:28,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:28:28,017 INFO L225 Difference]: With dead ends: 353 [2022-12-14 15:28:28,017 INFO L226 Difference]: Without dead ends: 353 [2022-12-14 15:28:28,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:28:28,018 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 42 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:28:28,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 725 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:28:28,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-12-14 15:28:28,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 336. [2022-12-14 15:28:28,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 206 states have (on average 1.6601941747572815) internal successors, (342), 312 states have internal predecessors, (342), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (24), 17 states have call predecessors, (24), 16 states have call successors, (24) [2022-12-14 15:28:28,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 382 transitions. [2022-12-14 15:28:28,021 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 382 transitions. Word has length 37 [2022-12-14 15:28:28,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:28:28,021 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 382 transitions. [2022-12-14 15:28:28,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 15:28:28,021 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 382 transitions. [2022-12-14 15:28:28,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 15:28:28,021 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:28:28,022 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:28:28,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-12-14 15:28:28,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:28:28,223 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr94REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:28:28,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:28:28,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1327181509, now seen corresponding path program 1 times [2022-12-14 15:28:28,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:28:28,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901921767] [2022-12-14 15:28:28,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:28,225 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:28:28,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:28:28,228 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:28:28,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-12-14 15:28:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:28,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 15:28:28,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:28:28,592 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 15:28:28,592 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:28:28,599 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:28,629 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 15:28:28,629 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:28:28,634 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:28,837 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-12-14 15:28:28,944 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:28,949 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:28,963 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:28:28,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 13 [2022-12-14 15:28:29,035 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:28:29,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:28:29,147 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 10 [2022-12-14 15:28:29,408 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:28:29,408 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:28:29,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901921767] [2022-12-14 15:28:29,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901921767] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 15:28:29,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:28:29,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2022-12-14 15:28:29,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113136170] [2022-12-14 15:28:29,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:28:29,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:28:29,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:28:29,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:28:29,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-12-14 15:28:29,409 INFO L87 Difference]: Start difference. First operand 336 states and 382 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 15:28:30,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:28:30,668 INFO L93 Difference]: Finished difference Result 342 states and 387 transitions. [2022-12-14 15:28:30,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 15:28:30,669 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-12-14 15:28:30,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:28:30,670 INFO L225 Difference]: With dead ends: 342 [2022-12-14 15:28:30,670 INFO L226 Difference]: Without dead ends: 342 [2022-12-14 15:28:30,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2022-12-14 15:28:30,671 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 54 mSDsluCounter, 1330 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:28:30,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1649 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 15:28:30,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-12-14 15:28:30,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 338. [2022-12-14 15:28:30,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 208 states have (on average 1.6538461538461537) internal successors, (344), 314 states have internal predecessors, (344), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (24), 17 states have call predecessors, (24), 16 states have call successors, (24) [2022-12-14 15:28:30,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 384 transitions. [2022-12-14 15:28:30,674 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 384 transitions. Word has length 37 [2022-12-14 15:28:30,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:28:30,674 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 384 transitions. [2022-12-14 15:28:30,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 15:28:30,674 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 384 transitions. [2022-12-14 15:28:30,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 15:28:30,674 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:28:30,675 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2022-12-14 15:28:30,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-12-14 15:28:30,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:28:30,876 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr85ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:28:30,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:28:30,877 INFO L85 PathProgramCache]: Analyzing trace with hash -445295076, now seen corresponding path program 1 times [2022-12-14 15:28:30,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:28:30,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [7035390] [2022-12-14 15:28:30,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:30,878 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:28:30,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:28:30,881 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:28:30,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-12-14 15:28:30,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:30,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 15:28:30,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:28:30,993 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:31,047 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:28:31,047 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:31,129 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:28:31,136 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:28:31,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:28:31,242 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 6 [2022-12-14 15:28:31,345 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:28:31,345 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:28:31,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [7035390] [2022-12-14 15:28:31,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [7035390] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:28:31,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1945029949] [2022-12-14 15:28:31,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:31,346 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:28:31,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:28:31,347 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:28:31,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-12-14 15:28:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:31,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 15:28:31,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:28:31,552 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:31,576 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:28:31,576 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:31,613 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:28:31,620 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:28:31,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:28:31,744 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 6 [2022-12-14 15:28:31,854 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:28:31,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1945029949] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:28:31,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78352020] [2022-12-14 15:28:31,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:31,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:28:31,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:28:31,855 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:28:31,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-12-14 15:28:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:31,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 15:28:31,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:28:31,972 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:31,998 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:28:31,998 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:28:32,042 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:28:32,049 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:28:32,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:28:32,164 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 6 [2022-12-14 15:28:32,252 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:28:32,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78352020] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:28:32,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:28:32,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 10 [2022-12-14 15:28:32,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578385775] [2022-12-14 15:28:32,252 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:28:32,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 15:28:32,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:28:32,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 15:28:32,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-12-14 15:28:32,253 INFO L87 Difference]: Start difference. First operand 338 states and 384 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 15:28:34,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:28:34,424 INFO L93 Difference]: Finished difference Result 375 states and 416 transitions. [2022-12-14 15:28:34,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 15:28:34,424 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2022-12-14 15:28:34,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:28:34,425 INFO L225 Difference]: With dead ends: 375 [2022-12-14 15:28:34,425 INFO L226 Difference]: Without dead ends: 375 [2022-12-14 15:28:34,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 199 SyntacticMatches, 14 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-12-14 15:28:34,426 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 553 mSDsluCounter, 1281 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:28:34,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 1516 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 15:28:34,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-12-14 15:28:34,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 341. [2022-12-14 15:28:34,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 211 states have (on average 1.6445497630331753) internal successors, (347), 317 states have internal predecessors, (347), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (24), 17 states have call predecessors, (24), 16 states have call successors, (24) [2022-12-14 15:28:34,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 387 transitions. [2022-12-14 15:28:34,429 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 387 transitions. Word has length 38 [2022-12-14 15:28:34,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:28:34,429 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 387 transitions. [2022-12-14 15:28:34,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 15:28:34,430 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 387 transitions. [2022-12-14 15:28:34,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 15:28:34,430 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:28:34,430 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:28:34,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-12-14 15:28:34,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-12-14 15:28:34,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (71)] Ended with exit code 0 [2022-12-14 15:28:35,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 15:28:35,033 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:28:35,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:28:35,034 INFO L85 PathProgramCache]: Analyzing trace with hash -183877918, now seen corresponding path program 1 times [2022-12-14 15:28:35,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:28:35,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160651086] [2022-12-14 15:28:35,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:35,035 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:28:35,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:28:35,036 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:28:35,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-12-14 15:28:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:35,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 15:28:35,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:28:37,498 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_entry_point_~client~0#1.base| (_ BitVec 32))) (and (exists ((|ULTIMATE.start_entry_point_~cfg~2#1.base| (_ BitVec 32)) (v_ArrVal_803 (_ BitVec 1))) (let ((.cse1 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base| v_ArrVal_803))) (let ((.cse0 (store .cse1 |ULTIMATE.start_entry_point_~cfg~2#1.base| (_ bv0 1)))) (and (= (bvadd (_ bv1 1) (select .cse0 |ULTIMATE.start_entry_point_~client~0#1.base|)) (_ bv0 1)) (= |c_#valid| (store .cse0 |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 1))) (= (_ bv0 1) (select .cse1 |ULTIMATE.start_entry_point_~cfg~2#1.base|)))))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base|)) (not (= |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 32))))) is different from true [2022-12-14 15:28:37,618 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 15:28:37,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:28:37,770 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 13 [2022-12-14 15:28:42,232 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:28:42,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160651086] [2022-12-14 15:28:42,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160651086] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:28:42,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2058451968] [2022-12-14 15:28:42,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:42,232 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:28:42,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:28:42,233 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:28:42,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2022-12-14 15:28:42,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:42,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 15:28:42,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:28:45,230 WARN L859 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32))) (exists ((|ULTIMATE.start_entry_point_~cfg~2#1.base| (_ BitVec 32)) (|ULTIMATE.start_entry_point_~client~0#1.base| (_ BitVec 32)) (v_ArrVal_826 (_ BitVec 1))) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base| v_ArrVal_826))) (let ((.cse1 (store .cse0 |ULTIMATE.start_entry_point_~cfg~2#1.base| (_ bv0 1)))) (and (= (_ bv0 1) (select .cse0 |ULTIMATE.start_entry_point_~cfg~2#1.base|)) (= (store .cse1 |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 1)) |c_#valid|) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base|)) (= (bvadd (select .cse1 |ULTIMATE.start_entry_point_~client~0#1.base|) (_ bv1 1)) (_ bv0 1)) (not (= |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 32)))))))) is different from true [2022-12-14 15:28:45,368 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:28:45,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:28:47,607 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 13 [2022-12-14 15:28:54,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2058451968] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:28:54,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516962800] [2022-12-14 15:28:54,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:54,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:28:54,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:28:54,036 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:28:54,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-12-14 15:28:54,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:54,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 15:28:54,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:29:02,716 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_entry_point_~client~0#1.base| (_ BitVec 32))) (and (exists ((|ULTIMATE.start_entry_point_~cfg~2#1.base| (_ BitVec 32)) (v_ArrVal_804 (_ BitVec 1))) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base| v_ArrVal_804))) (and (= (store (store .cse0 |ULTIMATE.start_entry_point_~cfg~2#1.base| (_ bv0 1)) |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 1)) |c_#valid|) (= (_ bv0 1) (select .cse0 |ULTIMATE.start_entry_point_~cfg~2#1.base|))))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base|)))) is different from true [2022-12-14 15:29:02,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:29:02,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:29:05,081 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret66#1.base_125| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret66#1.base_125|))) (= |c_ULTIMATE.start_main_old_#valid#1| (store (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret66#1.base_125| (_ bv0 1)) |c_ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 1))))) is different from false [2022-12-14 15:29:05,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516962800] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:29:05,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:29:05,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 27 [2022-12-14 15:29:05,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310868248] [2022-12-14 15:29:05,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:29:05,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 15:29:05,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:29:05,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 15:29:05,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1146, Unknown=17, NotChecked=292, Total=1640 [2022-12-14 15:29:05,084 INFO L87 Difference]: Start difference. First operand 341 states and 387 transitions. Second operand has 28 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 22 states have internal predecessors, (77), 8 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-12-14 15:29:13,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:29:13,391 INFO L93 Difference]: Finished difference Result 356 states and 401 transitions. [2022-12-14 15:29:13,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 15:29:13,392 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 22 states have internal predecessors, (77), 8 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 39 [2022-12-14 15:29:13,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:29:13,393 INFO L225 Difference]: With dead ends: 356 [2022-12-14 15:29:13,393 INFO L226 Difference]: Without dead ends: 339 [2022-12-14 15:29:13,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 147 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 4 IntricatePredicates, 3 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=277, Invalid=1702, Unknown=17, NotChecked=356, Total=2352 [2022-12-14 15:29:13,394 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 384 mSDsluCounter, 2256 mSDsCounter, 0 mSdLazyCounter, 2478 mSolverCounterSat, 56 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 2435 SdHoareTripleChecker+Invalid, 3574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2478 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 1032 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-12-14 15:29:13,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 2435 Invalid, 3574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2478 Invalid, 8 Unknown, 1032 Unchecked, 5.7s Time] [2022-12-14 15:29:13,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-12-14 15:29:13,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2022-12-14 15:29:13,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 209 states have (on average 1.6507177033492824) internal successors, (345), 316 states have internal predecessors, (345), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 16 states have call predecessors, (23), 16 states have call successors, (23) [2022-12-14 15:29:13,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 384 transitions. [2022-12-14 15:29:13,398 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 384 transitions. Word has length 39 [2022-12-14 15:29:13,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:29:13,398 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 384 transitions. [2022-12-14 15:29:13,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 22 states have internal predecessors, (77), 8 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-12-14 15:29:13,398 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 384 transitions. [2022-12-14 15:29:13,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 15:29:13,398 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:29:13,398 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 15:29:13,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (74)] Ended with exit code 0 [2022-12-14 15:29:13,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Ended with exit code 0 [2022-12-14 15:29:13,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-12-14 15:29:14,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:29:14,001 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:29:14,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:29:14,002 INFO L85 PathProgramCache]: Analyzing trace with hash 224946307, now seen corresponding path program 1 times [2022-12-14 15:29:14,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:29:14,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162424421] [2022-12-14 15:29:14,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:14,004 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:29:14,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:29:14,005 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:29:14,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-12-14 15:29:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:14,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:29:14,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:29:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:29:14,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:29:14,182 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:29:14,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162424421] [2022-12-14 15:29:14,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162424421] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:29:14,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:29:14,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 15:29:14,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778144842] [2022-12-14 15:29:14,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:29:14,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:29:14,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:29:14,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:29:14,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:29:14,183 INFO L87 Difference]: Start difference. First operand 339 states and 384 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 15:29:14,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:29:14,230 INFO L93 Difference]: Finished difference Result 327 states and 371 transitions. [2022-12-14 15:29:14,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:29:14,231 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-12-14 15:29:14,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:29:14,232 INFO L225 Difference]: With dead ends: 327 [2022-12-14 15:29:14,232 INFO L226 Difference]: Without dead ends: 327 [2022-12-14 15:29:14,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:29:14,232 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 236 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 1039 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:29:14,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 1039 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:29:14,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-12-14 15:29:14,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2022-12-14 15:29:14,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 197 states have (on average 1.6852791878172588) internal successors, (332), 304 states have internal predecessors, (332), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 16 states have call predecessors, (23), 16 states have call successors, (23) [2022-12-14 15:29:14,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 371 transitions. [2022-12-14 15:29:14,236 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 371 transitions. Word has length 39 [2022-12-14 15:29:14,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:29:14,236 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 371 transitions. [2022-12-14 15:29:14,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 15:29:14,236 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 371 transitions. [2022-12-14 15:29:14,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 15:29:14,236 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:29:14,237 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:29:14,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Ended with exit code 0 [2022-12-14 15:29:14,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:29:14,438 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr77ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:29:14,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:29:14,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1294605214, now seen corresponding path program 1 times [2022-12-14 15:29:14,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:29:14,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334718602] [2022-12-14 15:29:14,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:14,441 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:29:14,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:29:14,443 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:29:14,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-12-14 15:29:14,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:14,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 15:29:14,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:29:14,591 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:29:14,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:29:14,591 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:29:14,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334718602] [2022-12-14 15:29:14,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334718602] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:29:14,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:29:14,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 15:29:14,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397336058] [2022-12-14 15:29:14,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:29:14,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:29:14,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:29:14,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:29:14,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:29:14,593 INFO L87 Difference]: Start difference. First operand 327 states and 371 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 15:29:14,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:29:14,638 INFO L93 Difference]: Finished difference Result 368 states and 416 transitions. [2022-12-14 15:29:14,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:29:14,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-12-14 15:29:14,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:29:14,640 INFO L225 Difference]: With dead ends: 368 [2022-12-14 15:29:14,640 INFO L226 Difference]: Without dead ends: 368 [2022-12-14 15:29:14,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:29:14,640 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 43 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:29:14,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 1285 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:29:14,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-12-14 15:29:14,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 329. [2022-12-14 15:29:14,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 199 states have (on average 1.678391959798995) internal successors, (334), 305 states have internal predecessors, (334), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) [2022-12-14 15:29:14,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 373 transitions. [2022-12-14 15:29:14,644 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 373 transitions. Word has length 41 [2022-12-14 15:29:14,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:29:14,645 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 373 transitions. [2022-12-14 15:29:14,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 15:29:14,645 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 373 transitions. [2022-12-14 15:29:14,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 15:29:14,645 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:29:14,645 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:29:14,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Ended with exit code 0 [2022-12-14 15:29:14,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:29:14,846 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr77ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:29:14,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:29:14,847 INFO L85 PathProgramCache]: Analyzing trace with hash -789046589, now seen corresponding path program 2 times [2022-12-14 15:29:14,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:29:14,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330708761] [2022-12-14 15:29:14,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:29:14,849 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:29:14,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:29:14,852 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:29:14,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-12-14 15:29:14,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:29:14,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:29:14,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:29:14,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:29:14,998 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 15:29:14,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:29:15,027 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 15:29:15,027 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:29:15,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330708761] [2022-12-14 15:29:15,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330708761] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:29:15,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1606142878] [2022-12-14 15:29:15,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:29:15,028 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:29:15,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:29:15,029 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:29:15,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2022-12-14 15:29:15,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:29:15,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:29:15,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:29:15,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:29:15,184 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 15:29:15,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:29:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 15:29:15,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1606142878] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:29:15,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359957523] [2022-12-14 15:29:15,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:29:15,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:29:15,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:29:15,208 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:29:15,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-12-14 15:29:15,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:29:15,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:29:15,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:29:15,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:29:15,313 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 15:29:15,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:29:15,342 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 15:29:15,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359957523] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:29:15,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:29:15,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 4 [2022-12-14 15:29:15,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493389158] [2022-12-14 15:29:15,342 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:29:15,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:29:15,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:29:15,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:29:15,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:29:15,343 INFO L87 Difference]: Start difference. First operand 329 states and 373 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 15:29:15,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:29:15,380 INFO L93 Difference]: Finished difference Result 328 states and 372 transitions. [2022-12-14 15:29:15,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:29:15,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-12-14 15:29:15,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:29:15,382 INFO L225 Difference]: With dead ends: 328 [2022-12-14 15:29:15,382 INFO L226 Difference]: Without dead ends: 328 [2022-12-14 15:29:15,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:29:15,382 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 228 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:29:15,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 1027 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:29:15,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-12-14 15:29:15,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2022-12-14 15:29:15,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 199 states have (on average 1.6733668341708543) internal successors, (333), 304 states have internal predecessors, (333), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) [2022-12-14 15:29:15,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 372 transitions. [2022-12-14 15:29:15,385 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 372 transitions. Word has length 41 [2022-12-14 15:29:15,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:29:15,385 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 372 transitions. [2022-12-14 15:29:15,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 15:29:15,386 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 372 transitions. [2022-12-14 15:29:15,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 15:29:15,386 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:29:15,386 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2022-12-14 15:29:15,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (79)] Ended with exit code 0 [2022-12-14 15:29:15,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Ended with exit code 0 [2022-12-14 15:29:15,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-12-14 15:29:15,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:29:15,988 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr88ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:29:15,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:29:15,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1368793298, now seen corresponding path program 1 times [2022-12-14 15:29:15,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:29:15,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1083046582] [2022-12-14 15:29:15,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:15,990 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:29:15,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:29:15,991 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:29:15,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-12-14 15:29:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:16,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 15:29:16,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:29:16,138 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:29:16,205 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:29:16,205 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:29:16,301 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:29:16,302 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 15:29:16,430 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:29:16,448 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:29:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:29:16,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:29:16,764 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:29:16,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1083046582] [2022-12-14 15:29:16,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1083046582] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:29:16,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [719332177] [2022-12-14 15:29:16,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:16,765 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:29:16,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:29:16,768 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:29:16,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2022-12-14 15:29:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:16,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 15:29:16,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:29:16,935 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:29:16,975 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:29:16,975 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:29:17,070 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:29:17,071 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 15:29:17,151 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:29:17,168 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:29:17,174 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 15:29:17,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:29:17,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [719332177] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:29:17,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258456043] [2022-12-14 15:29:17,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:17,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:29:17,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:29:17,483 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:29:17,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-12-14 15:29:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:17,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 15:29:17,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:29:17,591 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:29:17,619 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:29:17,619 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:29:17,680 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:29:17,681 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 15:29:17,762 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:29:17,780 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:29:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 15:29:17,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:29:18,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258456043] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:29:18,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:29:18,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 13 [2022-12-14 15:29:18,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260056623] [2022-12-14 15:29:18,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:29:18,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 15:29:18,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:29:18,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 15:29:18,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-12-14 15:29:18,057 INFO L87 Difference]: Start difference. First operand 328 states and 372 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 15:29:20,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:29:20,706 INFO L93 Difference]: Finished difference Result 348 states and 388 transitions. [2022-12-14 15:29:20,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 15:29:20,706 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2022-12-14 15:29:20,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:29:20,707 INFO L225 Difference]: With dead ends: 348 [2022-12-14 15:29:20,707 INFO L226 Difference]: Without dead ends: 348 [2022-12-14 15:29:20,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 153 SyntacticMatches, 13 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-12-14 15:29:20,707 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 418 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 47 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 1450 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 15:29:20,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 1450 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1252 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 15:29:20,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-12-14 15:29:20,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 331. [2022-12-14 15:29:20,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 202 states have (on average 1.6633663366336633) internal successors, (336), 307 states have internal predecessors, (336), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) [2022-12-14 15:29:20,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 375 transitions. [2022-12-14 15:29:20,711 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 375 transitions. Word has length 41 [2022-12-14 15:29:20,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:29:20,711 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 375 transitions. [2022-12-14 15:29:20,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 15:29:20,711 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 375 transitions. [2022-12-14 15:29:20,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 15:29:20,711 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:29:20,711 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:29:20,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Ended with exit code 0 [2022-12-14 15:29:20,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (82)] Ended with exit code 0 [2022-12-14 15:29:21,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-12-14 15:29:21,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:29:21,313 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:29:21,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:29:21,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1309353403, now seen corresponding path program 1 times [2022-12-14 15:29:21,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:29:21,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049637537] [2022-12-14 15:29:21,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:21,315 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:29:21,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:29:21,318 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:29:21,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-12-14 15:29:21,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:21,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 15:29:21,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:29:21,471 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 15:29:21,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:29:21,472 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:29:21,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049637537] [2022-12-14 15:29:21,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049637537] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:29:21,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:29:21,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 15:29:21,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243039003] [2022-12-14 15:29:21,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:29:21,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:29:21,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:29:21,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:29:21,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:29:21,473 INFO L87 Difference]: Start difference. First operand 331 states and 375 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 15:29:21,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:29:21,518 INFO L93 Difference]: Finished difference Result 385 states and 433 transitions. [2022-12-14 15:29:21,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:29:21,518 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 42 [2022-12-14 15:29:21,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:29:21,519 INFO L225 Difference]: With dead ends: 385 [2022-12-14 15:29:21,519 INFO L226 Difference]: Without dead ends: 385 [2022-12-14 15:29:21,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:29:21,520 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 50 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1405 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:29:21,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1405 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:29:21,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-12-14 15:29:21,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 333. [2022-12-14 15:29:21,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 204 states have (on average 1.6568627450980393) internal successors, (338), 308 states have internal predecessors, (338), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 18 states have call predecessors, (23), 16 states have call successors, (23) [2022-12-14 15:29:21,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 377 transitions. [2022-12-14 15:29:21,523 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 377 transitions. Word has length 42 [2022-12-14 15:29:21,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:29:21,523 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 377 transitions. [2022-12-14 15:29:21,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 15:29:21,523 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 377 transitions. [2022-12-14 15:29:21,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 15:29:21,524 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:29:21,524 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:29:21,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2022-12-14 15:29:21,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:29:21,725 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr78ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:29:21,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:29:21,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1309359926, now seen corresponding path program 1 times [2022-12-14 15:29:21,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:29:21,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698801098] [2022-12-14 15:29:21,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:21,727 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:29:21,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:29:21,730 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:29:21,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-12-14 15:29:21,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:21,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 15:29:21,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:29:22,208 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 15:29:22,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:29:22,322 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 15:29:22,322 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:29:22,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [698801098] [2022-12-14 15:29:22,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [698801098] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:29:22,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1459988369] [2022-12-14 15:29:22,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:22,323 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:29:22,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:29:22,324 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:29:22,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (86)] Waiting until timeout for monitored process [2022-12-14 15:29:22,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:22,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:29:22,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:29:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:29:22,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:29:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 15:29:22,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1459988369] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:29:22,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883036153] [2022-12-14 15:29:22,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:22,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:29:22,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:29:22,559 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:29:22,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-12-14 15:29:22,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:22,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:29:22,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:29:22,713 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:29:22,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:29:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 15:29:22,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883036153] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:29:22,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:29:22,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 5, 4] total 9 [2022-12-14 15:29:22,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659759287] [2022-12-14 15:29:22,757 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:29:22,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 15:29:22,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:29:22,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 15:29:22,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:29:22,758 INFO L87 Difference]: Start difference. First operand 333 states and 377 transitions. Second operand has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 15:29:23,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:29:23,195 INFO L93 Difference]: Finished difference Result 334 states and 378 transitions. [2022-12-14 15:29:23,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:29:23,196 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 42 [2022-12-14 15:29:23,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:29:23,197 INFO L225 Difference]: With dead ends: 334 [2022-12-14 15:29:23,197 INFO L226 Difference]: Without dead ends: 334 [2022-12-14 15:29:23,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 235 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:29:23,197 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 1007 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1017 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:29:23,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1017 Valid, 1153 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:29:23,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-12-14 15:29:23,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 332. [2022-12-14 15:29:23,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 204 states have (on average 1.6519607843137254) internal successors, (337), 307 states have internal predecessors, (337), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 18 states have call predecessors, (23), 16 states have call successors, (23) [2022-12-14 15:29:23,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 376 transitions. [2022-12-14 15:29:23,200 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 376 transitions. Word has length 42 [2022-12-14 15:29:23,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:29:23,200 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 376 transitions. [2022-12-14 15:29:23,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 15:29:23,201 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 376 transitions. [2022-12-14 15:29:23,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 15:29:23,201 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:29:23,201 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:29:23,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Ended with exit code 0 [2022-12-14 15:29:23,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (86)] Forceful destruction successful, exit code 0 [2022-12-14 15:29:23,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-12-14 15:29:23,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:29:23,803 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:29:23,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:29:23,804 INFO L85 PathProgramCache]: Analyzing trace with hash 421849722, now seen corresponding path program 1 times [2022-12-14 15:29:23,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:29:23,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436948293] [2022-12-14 15:29:23,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:23,806 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:29:23,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:29:23,808 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:29:23,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-12-14 15:29:23,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:23,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 15:29:23,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:29:23,948 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:29:23,973 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 15:29:23,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:29:23,973 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:29:23,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1436948293] [2022-12-14 15:29:23,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1436948293] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:29:23,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:29:23,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:29:23,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108857239] [2022-12-14 15:29:23,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:29:23,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:29:23,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:29:23,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:29:23,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:29:23,974 INFO L87 Difference]: Start difference. First operand 332 states and 376 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 15:29:24,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:29:24,531 INFO L93 Difference]: Finished difference Result 335 states and 379 transitions. [2022-12-14 15:29:24,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:29:24,532 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 42 [2022-12-14 15:29:24,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:29:24,533 INFO L225 Difference]: With dead ends: 335 [2022-12-14 15:29:24,533 INFO L226 Difference]: Without dead ends: 335 [2022-12-14 15:29:24,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:29:24,533 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 14 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 929 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 15:29:24,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 929 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 15:29:24,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-12-14 15:29:24,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 331. [2022-12-14 15:29:24,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 204 states have (on average 1.6470588235294117) internal successors, (336), 306 states have internal predecessors, (336), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 18 states have call predecessors, (23), 16 states have call successors, (23) [2022-12-14 15:29:24,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 375 transitions. [2022-12-14 15:29:24,536 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 375 transitions. Word has length 42 [2022-12-14 15:29:24,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:29:24,536 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 375 transitions. [2022-12-14 15:29:24,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 15:29:24,537 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 375 transitions. [2022-12-14 15:29:24,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 15:29:24,537 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:29:24,537 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:29:24,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Ended with exit code 0 [2022-12-14 15:29:24,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:29:24,738 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:29:24,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:29:24,739 INFO L85 PathProgramCache]: Analyzing trace with hash 421849723, now seen corresponding path program 1 times [2022-12-14 15:29:24,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:29:24,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [748468010] [2022-12-14 15:29:24,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:24,741 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:29:24,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:29:24,744 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:29:24,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-12-14 15:29:25,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:25,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 15:29:25,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:29:25,180 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:29:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 15:29:25,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:29:25,235 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:29:25,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [748468010] [2022-12-14 15:29:25,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [748468010] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:29:25,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:29:25,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 15:29:25,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379762876] [2022-12-14 15:29:25,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:29:25,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:29:25,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:29:25,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:29:25,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:29:25,236 INFO L87 Difference]: Start difference. First operand 331 states and 375 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 15:29:26,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:29:26,080 INFO L93 Difference]: Finished difference Result 381 states and 429 transitions. [2022-12-14 15:29:26,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:29:26,081 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 42 [2022-12-14 15:29:26,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:29:26,082 INFO L225 Difference]: With dead ends: 381 [2022-12-14 15:29:26,082 INFO L226 Difference]: Without dead ends: 381 [2022-12-14 15:29:26,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:29:26,083 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 54 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 1399 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 15:29:26,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 1399 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 15:29:26,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-12-14 15:29:26,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 330. [2022-12-14 15:29:26,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 204 states have (on average 1.642156862745098) internal successors, (335), 305 states have internal predecessors, (335), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 18 states have call predecessors, (23), 16 states have call successors, (23) [2022-12-14 15:29:26,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 374 transitions. [2022-12-14 15:29:26,086 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 374 transitions. Word has length 42 [2022-12-14 15:29:26,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:29:26,086 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 374 transitions. [2022-12-14 15:29:26,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 15:29:26,086 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 374 transitions. [2022-12-14 15:29:26,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 15:29:26,086 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:29:26,086 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:29:26,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Ended with exit code 0 [2022-12-14 15:29:26,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:29:26,287 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr79ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:29:26,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:29:26,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1935452453, now seen corresponding path program 1 times [2022-12-14 15:29:26,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:29:26,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467950297] [2022-12-14 15:29:26,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:26,288 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:29:26,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:29:26,289 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:29:26,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-12-14 15:29:26,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:26,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 15:29:26,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:29:26,543 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:29:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:29:26,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:29:26,658 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:29:26,659 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:29:26,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467950297] [2022-12-14 15:29:26,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467950297] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:29:26,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [261389718] [2022-12-14 15:29:26,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:26,659 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:29:26,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:29:26,660 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:29:26,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (91)] Waiting until timeout for monitored process [2022-12-14 15:29:26,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:26,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 15:29:26,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:29:26,831 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:29:26,859 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:29:26,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:29:26,929 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:29:26,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [261389718] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:29:26,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853342471] [2022-12-14 15:29:26,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:26,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:29:26,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:29:26,930 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:29:26,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-12-14 15:29:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:27,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 15:29:27,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:29:27,034 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:29:27,059 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:29:27,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:29:27,130 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:29:27,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853342471] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:29:27,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:29:27,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 6 [2022-12-14 15:29:27,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354333884] [2022-12-14 15:29:27,131 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:29:27,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:29:27,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:29:27,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:29:27,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:29:27,132 INFO L87 Difference]: Start difference. First operand 330 states and 374 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 15:29:28,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:29:28,449 INFO L93 Difference]: Finished difference Result 348 states and 388 transitions. [2022-12-14 15:29:28,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:29:28,450 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2022-12-14 15:29:28,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:29:28,451 INFO L225 Difference]: With dead ends: 348 [2022-12-14 15:29:28,451 INFO L226 Difference]: Without dead ends: 348 [2022-12-14 15:29:28,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 245 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:29:28,451 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 155 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:29:28,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 984 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 15:29:28,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-12-14 15:29:28,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 333. [2022-12-14 15:29:28,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 207 states have (on average 1.6328502415458936) internal successors, (338), 308 states have internal predecessors, (338), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 18 states have call predecessors, (23), 16 states have call successors, (23) [2022-12-14 15:29:28,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 377 transitions. [2022-12-14 15:29:28,455 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 377 transitions. Word has length 43 [2022-12-14 15:29:28,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:29:28,455 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 377 transitions. [2022-12-14 15:29:28,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 15:29:28,455 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 377 transitions. [2022-12-14 15:29:28,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 15:29:28,455 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:29:28,455 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2022-12-14 15:29:28,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Ended with exit code 0 [2022-12-14 15:29:28,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (91)] Ended with exit code 0 [2022-12-14 15:29:28,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-12-14 15:29:29,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:29:29,057 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:29:29,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:29:29,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1150380693, now seen corresponding path program 1 times [2022-12-14 15:29:29,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:29:29,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431744061] [2022-12-14 15:29:29,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:29,060 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:29:29,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:29:29,062 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:29:29,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-12-14 15:29:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:29,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 15:29:29,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:29:29,263 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:29:29,263 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:29:29,355 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:29:29,355 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:29:29,465 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:29:29,465 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:29:29,617 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:29:29,647 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:29:29,666 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:29:29,672 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:29:29,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:29:29,833 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:29:29,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [431744061] [2022-12-14 15:29:29,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [431744061] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:29:29,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [80409890] [2022-12-14 15:29:29,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:29,834 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:29:29,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:29:29,835 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:29:29,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (94)] Waiting until timeout for monitored process [2022-12-14 15:29:30,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:30,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 15:29:30,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:29:30,061 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 3 [2022-12-14 15:29:30,113 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:29:30,113 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:29:30,228 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:29:30,228 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:29:30,525 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-14 15:29:30,525 INFO L350 Elim1Store]: Elim1 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 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-14 15:29:30,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 21 treesize of output 30 [2022-12-14 15:29:31,254 INFO L321 Elim1Store]: treesize reduction 60, result has 27.7 percent of original size [2022-12-14 15:29:31,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 53 [2022-12-14 15:29:31,610 INFO L321 Elim1Store]: treesize reduction 64, result has 26.4 percent of original size [2022-12-14 15:29:31,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 53 [2022-12-14 15:29:31,676 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:29:31,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:29:32,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [80409890] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:29:32,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649038447] [2022-12-14 15:29:32,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:32,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:29:32,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:29:32,186 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:29:32,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-12-14 15:29:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:32,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 15:29:32,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:29:32,372 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:29:32,372 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:29:32,531 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-14 15:29:32,531 INFO L350 Elim1Store]: Elim1 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 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-14 15:29:32,738 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-14 15:29:32,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-14 15:29:33,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 32 [2022-12-14 15:29:33,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 21 treesize of output 32 [2022-12-14 15:29:33,115 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 21 treesize of output 25 [2022-12-14 15:29:33,121 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 15:29:33,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:29:33,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649038447] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:29:33,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:29:33,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17, 10] total 28 [2022-12-14 15:29:33,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989478384] [2022-12-14 15:29:33,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:29:33,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 15:29:33,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:29:33,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 15:29:33,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1151, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 15:29:33,272 INFO L87 Difference]: Start difference. First operand 333 states and 377 transitions. Second operand has 30 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 21 states have internal predecessors, (69), 10 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2022-12-14 15:29:37,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:29:39,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:29:41,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:29:44,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:29:46,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:29:48,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:29:50,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:29:52,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:29:54,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:29:56,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:29:58,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:30:00,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:30:02,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:30:04,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:30:06,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:30:09,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:30:11,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:30:13,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:30:15,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:30:18,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:30:20,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:30:22,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:30:24,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:30:26,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:30:28,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:30:30,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:30:32,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:30:34,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:30:37,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:30:39,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:30:42,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:30:44,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:30:46,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:30:48,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:30:50,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:30:52,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:30:55,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:30:57,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:30:59,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:31:02,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:31:04,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:31:06,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:31:08,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:31:11,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:31:13,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:31:17,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:31:19,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:31:22,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:31:24,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:31:24,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:31:24,277 INFO L93 Difference]: Finished difference Result 401 states and 445 transitions. [2022-12-14 15:31:24,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 15:31:24,278 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 21 states have internal predecessors, (69), 10 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 43 [2022-12-14 15:31:24,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:31:24,279 INFO L225 Difference]: With dead ends: 401 [2022-12-14 15:31:24,279 INFO L226 Difference]: Without dead ends: 401 [2022-12-14 15:31:24,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 122 SyntacticMatches, 10 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=613, Invalid=2142, Unknown=1, NotChecked=0, Total=2756 [2022-12-14 15:31:24,280 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 842 mSDsluCounter, 2034 mSDsCounter, 0 mSdLazyCounter, 2384 mSolverCounterSat, 162 mSolverCounterUnsat, 47 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 107.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 2229 SdHoareTripleChecker+Invalid, 2593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 2384 IncrementalHoareTripleChecker+Invalid, 47 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 108.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:31:24,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 2229 Invalid, 2593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 2384 Invalid, 47 Unknown, 0 Unchecked, 108.1s Time] [2022-12-14 15:31:24,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-12-14 15:31:24,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 335. [2022-12-14 15:31:24,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 209 states have (on average 1.6267942583732058) internal successors, (340), 310 states have internal predecessors, (340), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 18 states have call predecessors, (23), 16 states have call successors, (23) [2022-12-14 15:31:24,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 379 transitions. [2022-12-14 15:31:24,283 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 379 transitions. Word has length 43 [2022-12-14 15:31:24,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:31:24,284 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 379 transitions. [2022-12-14 15:31:24,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 21 states have internal predecessors, (69), 10 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2022-12-14 15:31:24,284 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 379 transitions. [2022-12-14 15:31:24,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 15:31:24,284 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:31:24,284 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:31:24,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Forceful destruction successful, exit code 0 [2022-12-14 15:31:24,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (94)] Ended with exit code 0 [2022-12-14 15:31:24,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-12-14 15:31:24,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:31:24,886 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:31:24,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:31:24,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1670659867, now seen corresponding path program 1 times [2022-12-14 15:31:24,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:31:24,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165082990] [2022-12-14 15:31:24,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:31:24,889 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:31:24,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:31:24,891 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:31:24,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2022-12-14 15:31:25,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:31:25,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 15:31:25,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:31:25,094 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:31:25,095 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:31:25,108 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 15:31:25,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:31:25,108 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:31:25,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1165082990] [2022-12-14 15:31:25,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1165082990] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:31:25,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:31:25,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:31:25,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381666746] [2022-12-14 15:31:25,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:31:25,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:31:25,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:31:25,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:31:25,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:31:25,110 INFO L87 Difference]: Start difference. First operand 335 states and 379 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 15:31:25,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:31:25,505 INFO L93 Difference]: Finished difference Result 334 states and 378 transitions. [2022-12-14 15:31:25,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:31:25,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2022-12-14 15:31:25,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:31:25,507 INFO L225 Difference]: With dead ends: 334 [2022-12-14 15:31:25,507 INFO L226 Difference]: Without dead ends: 334 [2022-12-14 15:31:25,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:31:25,507 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 14 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:31:25,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 712 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:31:25,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-12-14 15:31:25,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 334. [2022-12-14 15:31:25,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 209 states have (on average 1.6220095693779903) internal successors, (339), 309 states have internal predecessors, (339), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 18 states have call predecessors, (23), 16 states have call successors, (23) [2022-12-14 15:31:25,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 378 transitions. [2022-12-14 15:31:25,510 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 378 transitions. Word has length 44 [2022-12-14 15:31:25,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:31:25,510 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 378 transitions. [2022-12-14 15:31:25,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 15:31:25,511 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 378 transitions. [2022-12-14 15:31:25,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 15:31:25,511 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:31:25,511 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:31:25,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (96)] Ended with exit code 0 [2022-12-14 15:31:25,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:31:25,712 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:31:25,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:31:25,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1670659868, now seen corresponding path program 1 times [2022-12-14 15:31:25,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:31:25,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [984442668] [2022-12-14 15:31:25,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:31:25,714 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:31:25,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:31:25,717 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:31:25,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2022-12-14 15:31:25,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:31:25,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 15:31:25,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:31:25,933 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:31:25,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:31:25,981 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-12-14 15:31:25,994 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:31:25,994 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:31:26,014 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 15:31:26,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:31:26,351 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 15:31:26,352 INFO L350 Elim1Store]: Elim1 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 39 treesize of output 63 [2022-12-14 15:31:27,332 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 22 [2022-12-14 15:31:27,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:31:27,340 INFO L350 Elim1Store]: Elim1 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 46 treesize of output 42 [2022-12-14 15:31:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 15:31:27,806 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:31:27,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [984442668] [2022-12-14 15:31:27,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [984442668] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:31:27,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [162350048] [2022-12-14 15:31:27,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:31:27,806 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:31:27,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:31:27,807 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:31:27,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (98)] Waiting until timeout for monitored process [2022-12-14 15:31:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:31:28,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 15:31:28,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:31:28,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:31:28,470 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-12-14 15:31:28,551 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 15:31:28,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:31:34,774 INFO L350 Elim1Store]: Elim1 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 47 treesize of output 43 [2022-12-14 15:31:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 15:31:35,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [162350048] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:31:35,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582582117] [2022-12-14 15:31:35,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:31:35,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:31:35,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:31:35,820 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:31:35,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-12-14 15:31:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:31:35,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 15:31:35,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:31:36,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:31:36,017 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-12-14 15:31:36,026 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:31:36,027 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:31:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 15:31:36,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:31:36,146 INFO L350 Elim1Store]: Elim1 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 50 treesize of output 46 [2022-12-14 15:31:36,180 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 15:31:36,180 INFO L350 Elim1Store]: Elim1 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 48 treesize of output 72 [2022-12-14 15:31:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 15:31:36,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582582117] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:31:36,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:31:36,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7, 6, 6, 6] total 22 [2022-12-14 15:31:36,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342795124] [2022-12-14 15:31:36,479 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:31:36,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 15:31:36,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:31:36,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 15:31:36,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=428, Unknown=3, NotChecked=0, Total=506 [2022-12-14 15:31:36,481 INFO L87 Difference]: Start difference. First operand 334 states and 378 transitions. Second operand has 23 states, 22 states have (on average 3.909090909090909) internal successors, (86), 19 states have internal predecessors, (86), 5 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (21), 9 states have call predecessors, (21), 5 states have call successors, (21) [2022-12-14 15:32:06,995 WARN L233 SmtUtils]: Spent 20.11s on a formula simplification. DAG size of input: 40 DAG size of output: 33 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:32:08,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 15:32:11,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 15:32:13,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 15:32:16,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:32:16,401 INFO L93 Difference]: Finished difference Result 333 states and 377 transitions. [2022-12-14 15:32:16,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 15:32:16,403 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.909090909090909) internal successors, (86), 19 states have internal predecessors, (86), 5 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (21), 9 states have call predecessors, (21), 5 states have call successors, (21) Word has length 44 [2022-12-14 15:32:16,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:32:16,403 INFO L225 Difference]: With dead ends: 333 [2022-12-14 15:32:16,403 INFO L226 Difference]: Without dead ends: 333 [2022-12-14 15:32:16,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 38.5s TimeCoverageRelationStatistics Valid=115, Invalid=527, Unknown=8, NotChecked=0, Total=650 [2022-12-14 15:32:16,404 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 1391 mSDsluCounter, 2251 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 69 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1401 SdHoareTripleChecker+Valid, 2525 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-12-14 15:32:16,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1401 Valid, 2525 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1008 Invalid, 3 Unknown, 0 Unchecked, 9.5s Time] [2022-12-14 15:32:16,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-12-14 15:32:16,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2022-12-14 15:32:16,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 209 states have (on average 1.6172248803827751) internal successors, (338), 308 states have internal predecessors, (338), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 18 states have call predecessors, (23), 16 states have call successors, (23) [2022-12-14 15:32:16,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 377 transitions. [2022-12-14 15:32:16,407 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 377 transitions. Word has length 44 [2022-12-14 15:32:16,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:32:16,407 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 377 transitions. [2022-12-14 15:32:16,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.909090909090909) internal successors, (86), 19 states have internal predecessors, (86), 5 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (21), 9 states have call predecessors, (21), 5 states have call successors, (21) [2022-12-14 15:32:16,407 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 377 transitions. [2022-12-14 15:32:16,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 15:32:16,408 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:32:16,408 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2022-12-14 15:32:16,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-12-14 15:32:16,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (97)] Ended with exit code 0 [2022-12-14 15:32:16,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (98)] Ended with exit code 0 [2022-12-14 15:32:17,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 15:32:17,010 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr91REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:32:17,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:32:17,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1709262998, now seen corresponding path program 1 times [2022-12-14 15:32:17,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:32:17,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1702720672] [2022-12-14 15:32:17,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:32:17,012 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:32:17,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:32:17,015 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:32:17,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-12-14 15:32:17,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:32:17,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 15:32:17,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:32:17,307 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:32:17,307 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 15:32:17,441 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-12-14 15:32:17,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2022-12-14 15:32:17,554 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 15:32:17,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 20 [2022-12-14 15:32:17,558 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:32:17,684 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2022-12-14 15:32:17,829 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-12-14 15:32:19,899 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:32:19,999 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 15:32:20,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:32:20,104 INFO L321 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2022-12-14 15:32:20,104 INFO L350 Elim1Store]: Elim1 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 32 treesize of output 31 [2022-12-14 15:32:20,277 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:32:20,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1702720672] [2022-12-14 15:32:20,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1702720672] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:32:20,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [799606712] [2022-12-14 15:32:20,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:32:20,278 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:32:20,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:32:20,279 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:32:20,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (101)] Waiting until timeout for monitored process [2022-12-14 15:32:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:32:20,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 15:32:20,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:32:22,823 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 15:32:22,824 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:32:23,134 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 15:32:23,134 INFO L350 Elim1Store]: Elim1 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 23 [2022-12-14 15:32:23,349 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 15:32:23,349 INFO L350 Elim1Store]: Elim1 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 27 [2022-12-14 15:32:23,354 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 15:32:23,355 INFO L350 Elim1Store]: Elim1 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 7 [2022-12-14 15:32:23,567 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 15:32:23,567 INFO L350 Elim1Store]: Elim1 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 28 treesize of output 32 [2022-12-14 15:32:23,584 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 15:32:23,816 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:32:23,930 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 15:32:23,930 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 10 [2022-12-14 15:32:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 16 refuted. 2 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 15:32:24,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:32:24,072 INFO L321 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2022-12-14 15:32:24,072 INFO L350 Elim1Store]: Elim1 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 32 treesize of output 31 [2022-12-14 15:32:24,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [799606712] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:32:24,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385137543] [2022-12-14 15:32:24,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:32:24,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:32:24,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:32:24,207 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:32:24,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-12-14 15:32:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:32:24,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 15:32:24,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:32:24,487 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:32:24,487 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:32:24,712 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:32:24,785 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 15:32:24,785 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:32:24,795 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:32:24,953 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:32:25,106 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-12-14 15:32:25,106 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 26 treesize of output 41 [2022-12-14 15:32:25,193 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:32:25,296 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:32:25,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:32:25,410 INFO L321 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2022-12-14 15:32:25,410 INFO L350 Elim1Store]: Elim1 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 192 treesize of output 185 [2022-12-14 15:32:25,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385137543] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:32:25,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:32:25,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 36 [2022-12-14 15:32:25,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151994176] [2022-12-14 15:32:25,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:32:25,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-14 15:32:25,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:32:25,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-14 15:32:25,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1764, Unknown=8, NotChecked=0, Total=2070 [2022-12-14 15:32:25,815 INFO L87 Difference]: Start difference. First operand 333 states and 377 transitions. Second operand has 38 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 32 states have internal predecessors, (92), 10 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-12-14 15:32:34,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:32:36,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:32:38,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:32:40,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:32:42,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:32:44,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:32:46,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:32:48,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:32:50,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:32:52,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:32:54,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:32:56,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:32:59,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:33:01,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:33:03,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:33:05,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:33:07,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:33:10,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:33:12,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:33:14,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:33:16,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:33:18,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:33:20,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:33:22,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:33:24,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:33:26,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:33:28,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:33:30,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:33:32,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:33:34,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:33:37,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:33:39,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:33:41,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:33:46,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:33:46,966 INFO L93 Difference]: Finished difference Result 379 states and 424 transitions. [2022-12-14 15:33:46,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 15:33:46,967 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 32 states have internal predecessors, (92), 10 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) Word has length 45 [2022-12-14 15:33:46,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:33:46,968 INFO L225 Difference]: With dead ends: 379 [2022-12-14 15:33:46,968 INFO L226 Difference]: Without dead ends: 379 [2022-12-14 15:33:46,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=579, Invalid=2940, Unknown=21, NotChecked=0, Total=3540 [2022-12-14 15:33:46,969 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 656 mSDsluCounter, 3736 mSDsCounter, 0 mSdLazyCounter, 2718 mSolverCounterSat, 94 mSolverCounterUnsat, 96 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 4019 SdHoareTripleChecker+Invalid, 2908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2718 IncrementalHoareTripleChecker+Invalid, 96 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 71.7s IncrementalHoareTripleChecker+Time [2022-12-14 15:33:46,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [656 Valid, 4019 Invalid, 2908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2718 Invalid, 96 Unknown, 0 Unchecked, 71.7s Time] [2022-12-14 15:33:46,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-12-14 15:33:46,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 350. [2022-12-14 15:33:46,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 225 states have (on average 1.6) internal successors, (360), 324 states have internal predecessors, (360), 16 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (20), 18 states have call predecessors, (20), 16 states have call successors, (20) [2022-12-14 15:33:46,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 396 transitions. [2022-12-14 15:33:46,973 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 396 transitions. Word has length 45 [2022-12-14 15:33:46,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:33:46,973 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 396 transitions. [2022-12-14 15:33:46,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 32 states have internal predecessors, (92), 10 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-12-14 15:33:46,973 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 396 transitions. [2022-12-14 15:33:46,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 15:33:46,973 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:33:46,973 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2022-12-14 15:33:46,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (101)] Ended with exit code 0 [2022-12-14 15:33:47,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (100)] Ended with exit code 0 [2022-12-14 15:33:47,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-12-14 15:33:47,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:33:47,575 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:33:47,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:33:47,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1709262999, now seen corresponding path program 1 times [2022-12-14 15:33:47,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:33:47,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670794224] [2022-12-14 15:33:47,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:33:47,578 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:33:47,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:33:47,580 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:33:47,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2022-12-14 15:33:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:33:47,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-14 15:33:47,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:33:48,130 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 15:33:48,131 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:33:48,140 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:33:48,164 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 15:33:48,164 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:33:48,174 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:33:48,268 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:33:48,582 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 15:33:48,582 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 26 [2022-12-14 15:33:48,607 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 15:33:48,607 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 26 [2022-12-14 15:33:48,884 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 15:33:48,885 INFO L350 Elim1Store]: Elim1 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 71 treesize of output 102 [2022-12-14 15:33:50,101 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-12-14 15:33:50,333 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 15:33:50,333 INFO L350 Elim1Store]: Elim1 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 46 treesize of output 38 [2022-12-14 15:33:50,348 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 15:33:50,349 INFO L350 Elim1Store]: Elim1 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 41 treesize of output 37 [2022-12-14 15:33:50,530 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:33:50,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:33:50,900 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 10 [2022-12-14 15:33:52,395 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 15:33:52,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 137 treesize of output 141 [2022-12-14 15:33:53,353 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:33:53,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670794224] [2022-12-14 15:33:53,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670794224] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:33:53,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [998411458] [2022-12-14 15:33:53,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:33:53,353 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:33:53,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:33:53,354 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:33:53,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (104)] Waiting until timeout for monitored process [2022-12-14 15:33:53,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:33:53,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-14 15:33:53,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:33:54,151 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 15:33:54,152 INFO L350 Elim1Store]: Elim1 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 27 [2022-12-14 15:33:54,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:33:54,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 13 treesize of output 7 [2022-12-14 15:33:54,194 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 15:33:54,194 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:33:54,199 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:33:54,351 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:33:54,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:33:54,781 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 15:33:54,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 33 treesize of output 39 [2022-12-14 15:33:54,803 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 15:33:54,803 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:33:55,129 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 15:33:55,129 INFO L350 Elim1Store]: Elim1 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 73 treesize of output 104 [2022-12-14 15:33:56,376 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:33:56,811 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 15:33:56,811 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 37 [2022-12-14 15:33:56,826 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 15:33:56,826 INFO L350 Elim1Store]: Elim1 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 37 treesize of output 33 [2022-12-14 15:33:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:33:56,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:33:57,002 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 10 [2022-12-14 15:33:57,752 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 15:33:57,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 137 treesize of output 141 [2022-12-14 15:33:58,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [998411458] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:33:58,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676450101] [2022-12-14 15:33:58,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:33:58,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:33:58,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:33:58,555 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:33:58,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-12-14 15:33:58,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:33:58,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 15:33:58,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:33:59,118 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:33:59,119 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:33:59,462 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:33:59,469 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:33:59,583 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 15:33:59,583 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:33:59,590 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:33:59,619 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 15:33:59,619 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:33:59,630 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:33:59,961 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:34:00,259 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-12-14 15:34:00,259 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 33 treesize of output 48 [2022-12-14 15:34:00,405 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:34:00,411 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:34:00,623 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:34:00,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:34:00,665 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 15:34:00,666 INFO L350 Elim1Store]: Elim1 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 38 treesize of output 42 [2022-12-14 15:34:01,188 INFO L350 Elim1Store]: Elim1 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 96 treesize of output 92 [2022-12-14 15:34:02,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676450101] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:34:02,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:34:02,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 12] total 38 [2022-12-14 15:34:02,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28113383] [2022-12-14 15:34:02,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:34:02,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-14 15:34:02,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:34:02,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-14 15:34:02,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=2317, Unknown=3, NotChecked=0, Total=2652 [2022-12-14 15:34:02,922 INFO L87 Difference]: Start difference. First operand 350 states and 396 transitions. Second operand has 40 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 33 states have internal predecessors, (100), 10 states have call successors, (12), 6 states have call predecessors, (12), 10 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-12-14 15:34:06,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:34:08,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:34:11,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:34:13,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:34:16,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:34:25,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:34:27,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:34:30,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:34:32,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:34:34,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:34:36,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:34:39,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:34:41,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:34:41,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:34:41,952 INFO L93 Difference]: Finished difference Result 391 states and 431 transitions. [2022-12-14 15:34:41,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 15:34:41,954 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 33 states have internal predecessors, (100), 10 states have call successors, (12), 6 states have call predecessors, (12), 10 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) Word has length 45 [2022-12-14 15:34:41,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:34:41,954 INFO L225 Difference]: With dead ends: 391 [2022-12-14 15:34:41,954 INFO L226 Difference]: Without dead ends: 389 [2022-12-14 15:34:41,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 150 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=767, Invalid=4780, Unknown=3, NotChecked=0, Total=5550 [2022-12-14 15:34:41,956 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 512 mSDsluCounter, 4681 mSDsCounter, 0 mSdLazyCounter, 3379 mSolverCounterSat, 53 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 4970 SdHoareTripleChecker+Invalid, 3445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 3379 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.8s IncrementalHoareTripleChecker+Time [2022-12-14 15:34:41,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 4970 Invalid, 3445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 3379 Invalid, 13 Unknown, 0 Unchecked, 34.8s Time] [2022-12-14 15:34:41,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-12-14 15:34:41,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 360. [2022-12-14 15:34:41,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 233 states have (on average 1.5793991416309012) internal successors, (368), 332 states have internal predecessors, (368), 16 states have call successors, (16), 11 states have call predecessors, (16), 13 states have return successors, (20), 18 states have call predecessors, (20), 16 states have call successors, (20) [2022-12-14 15:34:41,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 404 transitions. [2022-12-14 15:34:41,959 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 404 transitions. Word has length 45 [2022-12-14 15:34:41,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:34:41,959 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 404 transitions. [2022-12-14 15:34:41,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 33 states have internal predecessors, (100), 10 states have call successors, (12), 6 states have call predecessors, (12), 10 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-12-14 15:34:41,959 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 404 transitions. [2022-12-14 15:34:41,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 15:34:41,959 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:34:41,959 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:34:41,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Ended with exit code 0 [2022-12-14 15:34:42,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (104)] Ended with exit code 0 [2022-12-14 15:34:42,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-12-14 15:34:42,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:34:42,562 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr82ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:34:42,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:34:42,563 INFO L85 PathProgramCache]: Analyzing trace with hash -871510309, now seen corresponding path program 1 times [2022-12-14 15:34:42,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:34:42,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895478518] [2022-12-14 15:34:42,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:34:42,564 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:34:42,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:34:42,567 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:34:42,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2022-12-14 15:34:42,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:34:42,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 15:34:42,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:34:42,730 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:34:42,822 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:42,822 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:34:42,918 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:34:42,925 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 15:34:42,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:34:43,261 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 15:34:43,262 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:34:43,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895478518] [2022-12-14 15:34:43,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [895478518] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:34:43,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1385619018] [2022-12-14 15:34:43,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:34:43,262 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:34:43,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:34:43,263 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:34:43,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (107)] Waiting until timeout for monitored process [2022-12-14 15:34:43,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:34:43,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 15:34:43,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:34:43,500 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:34:43,551 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:43,551 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:34:43,600 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:34:43,605 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 15:34:43,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:34:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 15:34:43,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1385619018] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:34:43,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812432672] [2022-12-14 15:34:43,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:34:43,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:34:43,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:34:43,881 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:34:43,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-12-14 15:34:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:34:44,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 15:34:44,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:34:44,052 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:34:44,110 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:44,110 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:34:44,158 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-12-14 15:34:44,164 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 15:34:44,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:34:44,419 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 15:34:44,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812432672] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:34:44,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:34:44,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 10 [2022-12-14 15:34:44,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021535662] [2022-12-14 15:34:44,419 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:34:44,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 15:34:44,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:34:44,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 15:34:44,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-12-14 15:34:44,420 INFO L87 Difference]: Start difference. First operand 360 states and 404 transitions. Second operand has 11 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 15:34:46,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:34:46,034 INFO L93 Difference]: Finished difference Result 377 states and 418 transitions. [2022-12-14 15:34:46,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:34:46,035 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-12-14 15:34:46,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:34:46,036 INFO L225 Difference]: With dead ends: 377 [2022-12-14 15:34:46,036 INFO L226 Difference]: Without dead ends: 377 [2022-12-14 15:34:46,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 246 SyntacticMatches, 15 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:34:46,037 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 305 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 15:34:46,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 978 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 15:34:46,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-12-14 15:34:46,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 360. [2022-12-14 15:34:46,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 233 states have (on average 1.5751072961373391) internal successors, (367), 332 states have internal predecessors, (367), 16 states have call successors, (16), 11 states have call predecessors, (16), 13 states have return successors, (20), 18 states have call predecessors, (20), 16 states have call successors, (20) [2022-12-14 15:34:46,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 403 transitions. [2022-12-14 15:34:46,040 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 403 transitions. Word has length 46 [2022-12-14 15:34:46,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:34:46,040 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 403 transitions. [2022-12-14 15:34:46,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 15:34:46,040 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 403 transitions. [2022-12-14 15:34:46,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 15:34:46,040 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:34:46,040 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:34:46,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (106)] Ended with exit code 0 [2022-12-14 15:34:46,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (107)] Ended with exit code 0 [2022-12-14 15:34:46,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-12-14 15:34:46,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:34:46,642 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-12-14 15:34:46,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:34:46,643 INFO L85 PathProgramCache]: Analyzing trace with hash -813633540, now seen corresponding path program 1 times [2022-12-14 15:34:46,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:34:46,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791904606] [2022-12-14 15:34:46,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:34:46,645 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:34:46,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:34:46,648 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 15:34:46,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2022-12-14 15:34:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:34:46,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 15:34:46,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:34:46,870 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:34:46,921 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:34:46,921 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:34:46,956 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:34:49,012 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_126| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_51| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_126| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_126|) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_51|)))) is different from true [2022-12-14 15:34:49,095 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 15:34:49,095 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 31 [2022-12-14 15:34:49,128 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 5 [2022-12-14 15:34:53,186 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_52| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_127| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_127| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_127|) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_52|)))) (exists ((v_ArrVal_1880 (_ BitVec 1)) (|ldv_malloc_#res.base| (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_1880)) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|))))) is different from true [2022-12-14 15:34:53,220 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-12-14 15:34:53,220 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 23 treesize of output 35 [2022-12-14 15:34:53,274 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 33 treesize of output 28 [2022-12-14 15:34:53,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 15:34:57,453 INFO L321 Elim1Store]: treesize reduction 56, result has 35.6 percent of original size [2022-12-14 15:34:57,453 INFO L350 Elim1Store]: Elim1 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 4 case distinctions, treesize of input 30 treesize of output 51 [2022-12-14 15:34:57,594 INFO L350 Elim1Store]: Elim1 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 41 treesize of output 32 [2022-12-14 15:34:57,617 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 32 [2022-12-14 15:34:57,656 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-12-14 15:34:57,656 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 25 treesize of output 36 [2022-12-14 15:34:57,728 INFO L350 Elim1Store]: Elim1 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 15 [2022-12-14 15:34:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 20 not checked. [2022-12-14 15:34:57,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:34:58,053 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_14| (_ BitVec 32)) (v_ArrVal_1886 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (select (store |c_#valid| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_14| (_ bv1 1)) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1886) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)) (_ bv1 1)) (_ bv0 1))) is different from false [2022-12-14 15:35:08,554 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:35:08,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791904606] [2022-12-14 15:35:08,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791904606] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:35:08,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1523538119] [2022-12-14 15:35:08,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:35:08,555 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:35:08,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:35:08,556 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:35:08,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (110)] Waiting until timeout for monitored process [2022-12-14 15:35:08,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:35:08,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 15:35:08,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:35:08,923 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:35:09,145 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 15:35:09,146 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:35:09,257 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:35:11,326 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_130| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_130| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_130|) (_ bv0 32))))) is different from true [2022-12-14 15:35:11,455 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 15:35:11,455 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 31 [2022-12-14 15:35:11,532 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 5 [2022-12-14 15:35:17,644 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_131| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_131|) (_ bv0 32)) |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_131|))) (exists ((v_ArrVal_1937 (_ BitVec 1)) (|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_1937))))) is different from true [2022-12-14 15:35:17,682 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-12-14 15:35:17,682 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 23 treesize of output 35 [2022-12-14 15:35:17,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:17,807 INFO L350 Elim1Store]: Elim1 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 33 treesize of output 28 [2022-12-14 15:35:17,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 15:35:24,161 INFO L321 Elim1Store]: treesize reduction 56, result has 35.6 percent of original size [2022-12-14 15:35:24,161 INFO L350 Elim1Store]: Elim1 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 4 case distinctions, treesize of input 30 treesize of output 51 [2022-12-14 15:35:24,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:24,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 41 treesize of output 32 [2022-12-14 15:35:24,614 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 32 [2022-12-14 15:35:24,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:24,818 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-12-14 15:35:24,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 48 [2022-12-14 15:35:25,004 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 19 [2022-12-14 15:35:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 20 not checked. [2022-12-14 15:35:25,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:35:27,737 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_15| (_ BitVec 32)) (v_ArrVal_1943 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_15|)) (= (_ bv0 1) (bvadd (select (store |c_#valid| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_15| (_ bv1 1)) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1943) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)) (_ bv1 1))))) is different from false [2022-12-14 15:36:13,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1523538119] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:36:13,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662772997] [2022-12-14 15:36:13,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:36:13,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:36:13,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:36:13,810 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:36:13,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6cb4885-c04d-400f-9dca-076c78ce378f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-12-14 15:36:13,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:36:13,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-14 15:36:14,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:36:14,003 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:36:16,125 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:36:16,125 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:36:16,294 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 15:36:16,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 15:36:18,453 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1992 (_ BitVec 1)) (|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_1992) |c_#valid|))) (exists ((|v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_52| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_127| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_127| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_127|) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_52|))))) is different from true [2022-12-14 15:36:18,502 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-14 15:36:18,502 INFO L350 Elim1Store]: Elim1 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 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-14 15:36:18,677 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 15:36:18,678 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 31 [2022-12-14 15:36:18,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 15:36:20,742 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1994 (_ BitVec 1)) (|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_1994) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) (exists ((|v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_52| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_127| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_127| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_127|) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_52|))))) is different from true [2022-12-14 15:36:20,796 INFO L321 Elim1Store]: treesize reduction 56, result has 35.6 percent of original size [2022-12-14 15:36:20,796 INFO L350 Elim1Store]: Elim1 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 4 case distinctions, treesize of input 30 treesize of output 51 [2022-12-14 15:36:20,859 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 33 treesize of output 28 [2022-12-14 15:36:20,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 15:36:27,103 INFO L321 Elim1Store]: treesize reduction 56, result has 35.6 percent of original size [2022-12-14 15:36:27,103 INFO L350 Elim1Store]: Elim1 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 4 case distinctions, treesize of input 30 treesize of output 51 [2022-12-14 15:36:27,400 INFO L350 Elim1Store]: Elim1 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 41 treesize of output 32 [2022-12-14 15:36:27,427 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 32 [2022-12-14 15:36:27,665 INFO L321 Elim1Store]: treesize reduction 78, result has 35.0 percent of original size [2022-12-14 15:36:27,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 67 [2022-12-14 15:36:27,835 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 19 [2022-12-14 15:36:28,355 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 14 not checked. [2022-12-14 15:36:28,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:36:28,797 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_14| (_ BitVec 32)) (v_ArrVal_2000 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (select (store |c_#valid| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_14| (_ bv1 1)) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_2000) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)) (_ bv1 1)) (_ bv0 1))) is different from false [2022-12-14 15:36:30,816 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_14| (_ BitVec 32)) (v_ArrVal_1998 (_ BitVec 32)) (v_ArrVal_2000 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select (store |c_#valid| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_14| (_ bv1 1)) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)) v_ArrVal_1998)) |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_2000) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)) (_ bv1 1)))) is different from false [2022-12-14 15:36:48,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662772997] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:36:48,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:36:48,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 20] total 52 [2022-12-14 15:36:48,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764115183] [2022-12-14 15:36:48,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:36:48,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-14 15:36:48,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:36:48,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-14 15:36:48,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=3095, Unknown=47, NotChecked=1230, Total=4692 [2022-12-14 15:36:48,342 INFO L87 Difference]: Start difference. First operand 360 states and 403 transitions. Second operand has 53 states, 51 states have (on average 1.7843137254901962) internal successors, (91), 45 states have internal predecessors, (91), 10 states have call successors, (11), 6 states have call predecessors, (11), 14 states have return successors, (14), 14 states have call predecessors, (14), 10 states have call successors, (14) [2022-12-14 15:36:50,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:36:52,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:36:54,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:36:56,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:36:58,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:37:00,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:37:02,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:37:04,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:37:06,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:37:12,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:37:35,696 WARN L233 SmtUtils]: Spent 7.26s on a formula simplification. DAG size of input: 70 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:37:44,080 WARN L233 SmtUtils]: Spent 8.24s on a formula simplification. DAG size of input: 70 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:37:46,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:37:48,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:37:52,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:37:54,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:37:56,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:37:57,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:37:58,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:37:59,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:38:01,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:38:04,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:38:06,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:38:08,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:38:13,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:38:15,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:38:18,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:38:20,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:38:22,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:38:24,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:38:26,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:38:28,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:38:30,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:38:32,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:38:34,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:38:39,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:38:41,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:38:43,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:38:44,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:38:47,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:38:49,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:38:51,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:38:53,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:38:55,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:38:57,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:38:58,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:38:59,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:39:01,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:39:04,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:39:06,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:39:07,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:39:09,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:39:11,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:39:16,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:39:19,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:39:21,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:39:24,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:39:26,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:39:27,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:39:29,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:39:31,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:39:35,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:39:38,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0]