./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test10-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test10-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 207ea7efa81a205528159a2c1c5225b996f0eb4901bda418907cbc964f19b86c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:36:49,714 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:36:49,717 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:36:49,755 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:36:49,761 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:36:49,762 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:36:49,763 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:36:49,765 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:36:49,766 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:36:49,769 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:36:49,770 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:36:49,771 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:36:49,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:36:49,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:36:49,780 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:36:49,781 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:36:49,782 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:36:49,789 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:36:49,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:36:49,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:36:49,794 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:36:49,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:36:49,798 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:36:49,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:36:49,805 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:36:49,811 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:36:49,812 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:36:49,813 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:36:49,813 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:36:49,814 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:36:49,814 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:36:49,817 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:36:49,818 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:36:49,818 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:36:49,820 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:36:49,821 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:36:49,822 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:36:49,823 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:36:49,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:36:49,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:36:49,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:36:49,826 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-03 02:36:49,866 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:36:49,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:36:49,869 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:36:49,870 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:36:49,871 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:36:49,871 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:36:49,872 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:36:49,872 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:36:49,872 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:36:49,872 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:36:49,873 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:36:49,874 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:36:49,874 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:36:49,874 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:36:49,874 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:36:49,875 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:36:49,875 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:36:49,875 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:36:49,876 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-03 02:36:49,876 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-03 02:36:49,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:36:49,878 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:36:49,879 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-03 02:36:49,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:36:49,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:36:49,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:36:49,879 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-03 02:36:49,880 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-03 02:36:49,880 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-03 02:36:49,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:36:49,881 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:36:49,881 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:36:49,881 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:36:49,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:36:49,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:36:49,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:36:49,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:36:49,882 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:36:49,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:36:49,883 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:36:49,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:36:49,883 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:36:49,883 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_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 207ea7efa81a205528159a2c1c5225b996f0eb4901bda418907cbc964f19b86c [2022-11-03 02:36:50,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:36:50,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:36:50,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:36:50,169 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:36:50,171 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:36:50,172 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-memsafety/memleaks_test10-1.i [2022-11-03 02:36:50,252 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/data/0b20637d1/86effe50939f432b8dcf391987bf9a3c/FLAG4025acba6 [2022-11-03 02:36:50,863 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:36:50,863 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/sv-benchmarks/c/ldv-memsafety/memleaks_test10-1.i [2022-11-03 02:36:50,877 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/data/0b20637d1/86effe50939f432b8dcf391987bf9a3c/FLAG4025acba6 [2022-11-03 02:36:51,121 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/data/0b20637d1/86effe50939f432b8dcf391987bf9a3c [2022-11-03 02:36:51,123 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:36:51,124 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:36:51,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:36:51,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:36:51,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:36:51,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:36:51" (1/1) ... [2022-11-03 02:36:51,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@652c97ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:51, skipping insertion in model container [2022-11-03 02:36:51,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:36:51" (1/1) ... [2022-11-03 02:36:51,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:36:51,182 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:36:51,645 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:36:51,660 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-03 02:36:51,661 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@8102e80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:51, skipping insertion in model container [2022-11-03 02:36:51,661 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:36:51,662 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-03 02:36:51,663 INFO L158 Benchmark]: Toolchain (without parser) took 537.90ms. Allocated memory is still 125.8MB. Free memory was 90.7MB in the beginning and 98.1MB in the end (delta: -7.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 02:36:51,664 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 86.0MB. Free memory was 56.9MB in the beginning and 56.8MB in the end (delta: 27.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:36:51,665 INFO L158 Benchmark]: CACSL2BoogieTranslator took 533.51ms. Allocated memory is still 125.8MB. Free memory was 90.4MB in the beginning and 98.1MB in the end (delta: -7.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 02:36:51,666 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 86.0MB. Free memory was 56.9MB in the beginning and 56.8MB in the end (delta: 27.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 533.51ms. Allocated memory is still 125.8MB. Free memory was 90.4MB in the beginning and 98.1MB in the end (delta: -7.7MB). Peak memory consumption was 8.4MB. 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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test10-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 207ea7efa81a205528159a2c1c5225b996f0eb4901bda418907cbc964f19b86c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:36:53,746 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:36:53,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:36:53,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:36:53,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:36:53,780 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:36:53,783 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:36:53,787 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:36:53,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:36:53,800 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:36:53,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:36:53,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:36:53,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:36:53,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:36:53,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:36:53,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:36:53,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:36:53,809 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:36:53,810 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:36:53,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:36:53,821 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:36:53,823 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:36:53,827 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:36:53,828 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:36:53,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:36:53,837 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:36:53,837 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:36:53,839 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:36:53,840 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:36:53,841 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:36:53,841 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:36:53,842 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:36:53,844 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:36:53,845 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:36:53,846 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:36:53,847 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:36:53,848 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:36:53,848 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:36:53,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:36:53,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:36:53,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:36:53,857 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-03 02:36:53,898 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:36:53,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:36:53,899 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:36:53,899 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:36:53,900 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:36:53,900 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:36:53,900 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:36:53,901 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:36:53,901 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:36:53,901 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:36:53,902 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:36:53,902 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:36:53,904 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-03 02:36:53,904 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-03 02:36:53,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:36:53,904 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:36:53,904 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-03 02:36:53,905 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:36:53,905 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:36:53,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:36:53,905 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-03 02:36:53,905 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-03 02:36:53,906 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-03 02:36:53,906 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:36:53,906 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:36:53,906 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:36:53,906 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:36:53,906 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:36:53,907 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:36:53,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:36:53,907 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:36:53,908 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:36:53,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:36:53,908 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:36:53,909 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:36:53,909 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:36:53,909 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:36:53,917 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:36:53,918 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:36:53,918 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_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 207ea7efa81a205528159a2c1c5225b996f0eb4901bda418907cbc964f19b86c [2022-11-03 02:36:54,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:36:54,292 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:36:54,295 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:36:54,296 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:36:54,297 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:36:54,298 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-memsafety/memleaks_test10-1.i [2022-11-03 02:36:54,375 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/data/e1b006f39/3caaa8daebbe416fa5c7f34e9760fd55/FLAG5e2b7aa93 [2022-11-03 02:36:55,031 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:36:55,032 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/sv-benchmarks/c/ldv-memsafety/memleaks_test10-1.i [2022-11-03 02:36:55,044 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/data/e1b006f39/3caaa8daebbe416fa5c7f34e9760fd55/FLAG5e2b7aa93 [2022-11-03 02:36:55,294 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/data/e1b006f39/3caaa8daebbe416fa5c7f34e9760fd55 [2022-11-03 02:36:55,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:36:55,298 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:36:55,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:36:55,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:36:55,304 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:36:55,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:36:55" (1/1) ... [2022-11-03 02:36:55,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ba4fa29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:55, skipping insertion in model container [2022-11-03 02:36:55,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:36:55" (1/1) ... [2022-11-03 02:36:55,313 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:36:55,377 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:36:55,866 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:36:55,892 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 02:36:55,910 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:36:55,993 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:36:56,004 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:36:56,080 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:36:56,118 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:36:56,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:56 WrapperNode [2022-11-03 02:36:56,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:36:56,120 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:36:56,121 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:36:56,121 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:36:56,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:56" (1/1) ... [2022-11-03 02:36:56,148 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:56" (1/1) ... [2022-11-03 02:36:56,167 INFO L138 Inliner]: procedures = 167, calls = 91, calls flagged for inlining = 22, calls inlined = 4, statements flattened = 66 [2022-11-03 02:36:56,168 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:36:56,169 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:36:56,169 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:36:56,169 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:36:56,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:56" (1/1) ... [2022-11-03 02:36:56,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:56" (1/1) ... [2022-11-03 02:36:56,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:56" (1/1) ... [2022-11-03 02:36:56,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:56" (1/1) ... [2022-11-03 02:36:56,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:56" (1/1) ... [2022-11-03 02:36:56,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:56" (1/1) ... [2022-11-03 02:36:56,193 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:56" (1/1) ... [2022-11-03 02:36:56,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:56" (1/1) ... [2022-11-03 02:36:56,197 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:36:56,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:36:56,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:36:56,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:36:56,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:56" (1/1) ... [2022-11-03 02:36:56,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:36:56,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:56,236 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:36:56,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:36:56,279 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 02:36:56,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 02:36:56,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:36:56,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:36:56,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:36:56,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:36:56,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:36:56,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:36:56,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:36:56,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:36:56,472 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:36:56,486 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:36:56,843 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:36:56,849 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:36:56,850 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 02:36:56,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:36:56 BoogieIcfgContainer [2022-11-03 02:36:56,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:36:56,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:36:56,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:36:56,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:36:56,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:36:55" (1/3) ... [2022-11-03 02:36:56,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59dc6eb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:36:56, skipping insertion in model container [2022-11-03 02:36:56,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:56" (2/3) ... [2022-11-03 02:36:56,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59dc6eb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:36:56, skipping insertion in model container [2022-11-03 02:36:56,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:36:56" (3/3) ... [2022-11-03 02:36:56,860 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test10-1.i [2022-11-03 02:36:56,879 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:36:56,880 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2022-11-03 02:36:56,974 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:36:56,986 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;@385c6419, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:36:56,986 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2022-11-03 02:36:56,992 INFO L276 IsEmpty]: Start isEmpty. Operand has 77 states, 37 states have (on average 2.027027027027027) internal successors, (75), 71 states have internal predecessors, (75), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 02:36:57,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:36:57,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:57,002 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:57,002 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:36:57,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:57,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1838783457, now seen corresponding path program 1 times [2022-11-03 02:36:57,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:57,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [402901795] [2022-11-03 02:36:57,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:57,024 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:57,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:57,033 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:57,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:36:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:57,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:36:57,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:57,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:57,236 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:57,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [402901795] [2022-11-03 02:36:57,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [402901795] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:57,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:57,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:36:57,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053309055] [2022-11-03 02:36:57,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:57,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:36:57,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:57,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:36:57,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:36:57,278 INFO L87 Difference]: Start difference. First operand has 77 states, 37 states have (on average 2.027027027027027) internal successors, (75), 71 states have internal predecessors, (75), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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) [2022-11-03 02:36:57,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:57,566 INFO L93 Difference]: Finished difference Result 148 states and 165 transitions. [2022-11-03 02:36:57,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:36:57,574 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 [2022-11-03 02:36:57,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:57,584 INFO L225 Difference]: With dead ends: 148 [2022-11-03 02:36:57,586 INFO L226 Difference]: Without dead ends: 144 [2022-11-03 02:36:57,588 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 [2022-11-03 02:36:57,591 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 67 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:57,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 377 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:36:57,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-03 02:36:57,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 79. [2022-11-03 02:36:57,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 72 states have internal predecessors, (76), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:36:57,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2022-11-03 02:36:57,640 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 11 [2022-11-03 02:36:57,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:57,641 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2022-11-03 02:36:57,641 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) [2022-11-03 02:36:57,642 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2022-11-03 02:36:57,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:36:57,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:57,643 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:57,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:57,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:57,869 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:36:57,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:57,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1568680158, now seen corresponding path program 1 times [2022-11-03 02:36:57,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:57,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [759430600] [2022-11-03 02:36:57,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:57,871 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:57,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:57,877 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:57,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:36:57,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:57,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:36:57,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:58,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:58,005 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:58,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [759430600] [2022-11-03 02:36:58,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [759430600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:58,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:58,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:36:58,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70398022] [2022-11-03 02:36:58,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:58,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:36:58,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:58,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:36:58,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:36:58,013 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand has 4 states, 3 states have (on average 3.0) 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) [2022-11-03 02:36:58,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:58,351 INFO L93 Difference]: Finished difference Result 144 states and 160 transitions. [2022-11-03 02:36:58,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:36:58,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) 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 [2022-11-03 02:36:58,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:58,354 INFO L225 Difference]: With dead ends: 144 [2022-11-03 02:36:58,355 INFO L226 Difference]: Without dead ends: 142 [2022-11-03 02:36:58,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:36:58,356 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 60 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:58,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 247 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:36:58,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-03 02:36:58,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 75. [2022-11-03 02:36:58,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 36 states have (on average 2.0) internal successors, (72), 69 states have internal predecessors, (72), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 02:36:58,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2022-11-03 02:36:58,378 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 11 [2022-11-03 02:36:58,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:58,379 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2022-11-03 02:36:58,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) 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) [2022-11-03 02:36:58,380 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2022-11-03 02:36:58,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 02:36:58,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:58,381 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:58,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:58,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:58,593 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:36:58,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:58,593 INFO L85 PathProgramCache]: Analyzing trace with hash -27781040, now seen corresponding path program 1 times [2022-11-03 02:36:58,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:58,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1983263029] [2022-11-03 02:36:58,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:58,595 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:58,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:58,601 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:58,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:36:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:58,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:36:58,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:58,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:36:58,847 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:36:58,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-03 02:36:58,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:58,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:59,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:59,081 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:59,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1983263029] [2022-11-03 02:36:59,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1983263029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:59,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2101684868] [2022-11-03 02:36:59,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:59,083 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:36:59,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:36:59,086 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:36:59,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-03 02:36:59,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:59,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:36:59,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:59,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:36:59,258 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:36:59,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-03 02:36:59,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:59,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:59,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2101684868] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:59,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176057307] [2022-11-03 02:36:59,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:59,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:59,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:59,452 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:59,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:36:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:59,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:36:59,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:59,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:37:01,625 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:37:01,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-03 02:37:01,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:37:01,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:01,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:37:01,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176057307] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:01,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:37:01,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6, 5, 6, 5] total 8 [2022-11-03 02:37:01,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922278584] [2022-11-03 02:37:01,848 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:37:01,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:37:01,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:01,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:37:01,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=53, Unknown=1, NotChecked=0, Total=72 [2022-11-03 02:37:01,850 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:37:04,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:04,294 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2022-11-03 02:37:04,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:37:04,295 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 15 [2022-11-03 02:37:04,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:04,296 INFO L225 Difference]: With dead ends: 100 [2022-11-03 02:37:04,296 INFO L226 Difference]: Without dead ends: 100 [2022-11-03 02:37:04,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 10 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=24, Invalid=65, Unknown=1, NotChecked=0, Total=90 [2022-11-03 02:37:04,298 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 52 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:04,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 289 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 235 Invalid, 0 Unknown, 194 Unchecked, 0.4s Time] [2022-11-03 02:37:04,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-03 02:37:04,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2022-11-03 02:37:04,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 51 states have (on average 1.8627450980392157) internal successors, (95), 80 states have internal predecessors, (95), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-03 02:37:04,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 110 transitions. [2022-11-03 02:37:04,318 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 110 transitions. Word has length 15 [2022-11-03 02:37:04,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:04,319 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 110 transitions. [2022-11-03 02:37:04,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:37:04,319 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 110 transitions. [2022-11-03 02:37:04,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 02:37:04,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:04,321 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:04,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:04,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2022-11-03 02:37:04,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:04,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:37:04,938 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:37:04,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:04,938 INFO L85 PathProgramCache]: Analyzing trace with hash -27781039, now seen corresponding path program 1 times [2022-11-03 02:37:04,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:04,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [792827345] [2022-11-03 02:37:04,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:04,939 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:04,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:04,941 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:04,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:37:05,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:05,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:37:05,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:05,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:37:09,282 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 02:37:09,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 02:37:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:37:09,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:09,644 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:09,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [792827345] [2022-11-03 02:37:09,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [792827345] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:37:09,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1905770327] [2022-11-03 02:37:09,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:09,645 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:37:09,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:37:09,649 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:37:09,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-03 02:37:09,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:09,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:37:09,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:09,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:37:09,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:37:14,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:37:14,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 02:37:14,171 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:37:14,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:37:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:37:14,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:22,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1905770327] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:37:22,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500363611] [2022-11-03 02:37:22,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:22,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:22,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:37:22,505 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:37:22,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:37:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:22,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:37:22,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:22,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:37:22,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:37:26,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:37:26,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 02:37:26,840 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:37:26,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:37:26,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:37:26,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:27,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500363611] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:37:27,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:37:27,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-11-03 02:37:27,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463684841] [2022-11-03 02:37:27,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:37:27,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 02:37:27,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:27,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 02:37:27,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=224, Unknown=5, NotChecked=0, Total=272 [2022-11-03 02:37:27,130 INFO L87 Difference]: Start difference. First operand 90 states and 110 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-03 02:37:32,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:32,113 INFO L93 Difference]: Finished difference Result 148 states and 172 transitions. [2022-11-03 02:37:32,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:37:32,114 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 15 [2022-11-03 02:37:32,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:32,115 INFO L225 Difference]: With dead ends: 148 [2022-11-03 02:37:32,115 INFO L226 Difference]: Without dead ends: 148 [2022-11-03 02:37:32,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=56, Invalid=279, Unknown=7, NotChecked=0, Total=342 [2022-11-03 02:37:32,116 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 104 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:32,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 455 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 456 Invalid, 0 Unknown, 156 Unchecked, 0.8s Time] [2022-11-03 02:37:32,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-03 02:37:32,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 118. [2022-11-03 02:37:32,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.8311688311688312) internal successors, (141), 106 states have internal predecessors, (141), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (14), 10 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-03 02:37:32,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 162 transitions. [2022-11-03 02:37:32,126 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 162 transitions. Word has length 15 [2022-11-03 02:37:32,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:32,127 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 162 transitions. [2022-11-03 02:37:32,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-03 02:37:32,127 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 162 transitions. [2022-11-03 02:37:32,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 02:37:32,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:32,128 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:32,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-11-03 02:37:32,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2022-11-03 02:37:32,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:32,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:32,740 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:37:32,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:32,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1824732399, now seen corresponding path program 1 times [2022-11-03 02:37:32,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:32,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1665143512] [2022-11-03 02:37:32,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:32,741 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:32,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:32,742 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:32,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:37:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:32,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:37:32,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:32,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:37:32,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:37:32,872 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:32,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1665143512] [2022-11-03 02:37:32,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1665143512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:32,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:37:32,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:37:32,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106673293] [2022-11-03 02:37:32,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:32,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:37:32,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:32,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:37:32,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:37:32,874 INFO L87 Difference]: Start difference. First operand 118 states and 162 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:37:32,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:32,964 INFO L93 Difference]: Finished difference Result 103 states and 137 transitions. [2022-11-03 02:37:32,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:37:32,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 15 [2022-11-03 02:37:32,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:32,966 INFO L225 Difference]: With dead ends: 103 [2022-11-03 02:37:32,966 INFO L226 Difference]: Without dead ends: 101 [2022-11-03 02:37:32,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:37:32,967 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 0 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:32,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 284 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:37:32,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-03 02:37:32,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-11-03 02:37:32,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 66 states have (on average 1.8333333333333333) internal successors, (121), 92 states have internal predecessors, (121), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-03 02:37:32,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 135 transitions. [2022-11-03 02:37:32,974 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 135 transitions. Word has length 15 [2022-11-03 02:37:32,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:32,975 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 135 transitions. [2022-11-03 02:37:32,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:37:32,975 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 135 transitions. [2022-11-03 02:37:32,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 02:37:32,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:32,976 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:32,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:33,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:37:33,177 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:37:33,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:33,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1259761877, now seen corresponding path program 1 times [2022-11-03 02:37:33,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:33,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211935101] [2022-11-03 02:37:33,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:33,178 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:33,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:33,179 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:33,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:37:33,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:33,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:37:33,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:33,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:37:33,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-03 02:37:33,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:37:33,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:37:33,331 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:33,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211935101] [2022-11-03 02:37:33,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211935101] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:33,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:37:33,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:37:33,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84093052] [2022-11-03 02:37:33,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:33,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:37:33,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:33,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:37:33,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:37:33,333 INFO L87 Difference]: Start difference. First operand 101 states and 135 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-11-03 02:37:33,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:33,546 INFO L93 Difference]: Finished difference Result 111 states and 149 transitions. [2022-11-03 02:37:33,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:37:33,547 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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 20 [2022-11-03 02:37:33,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:33,547 INFO L225 Difference]: With dead ends: 111 [2022-11-03 02:37:33,548 INFO L226 Difference]: Without dead ends: 111 [2022-11-03 02:37:33,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:37:33,549 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 5 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:33,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 313 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:37:33,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-03 02:37:33,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 105. [2022-11-03 02:37:33,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 70 states have (on average 1.7857142857142858) internal successors, (125), 95 states have internal predecessors, (125), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-03 02:37:33,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 139 transitions. [2022-11-03 02:37:33,569 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 139 transitions. Word has length 20 [2022-11-03 02:37:33,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:33,569 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 139 transitions. [2022-11-03 02:37:33,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-11-03 02:37:33,570 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 139 transitions. [2022-11-03 02:37:33,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 02:37:33,570 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:33,571 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:33,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:33,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:37:33,783 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:37:33,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:33,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1227750956, now seen corresponding path program 1 times [2022-11-03 02:37:33,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:33,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [152165831] [2022-11-03 02:37:33,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:33,785 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:33,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:33,786 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:33,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:37:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:33,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:37:33,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:34,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:37:34,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:34,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:37:34,250 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:34,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [152165831] [2022-11-03 02:37:34,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [152165831] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:34,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [669889663] [2022-11-03 02:37:34,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:34,251 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:37:34,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:37:34,253 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:37:34,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-03 02:37:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:34,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:37:34,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:34,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:37:34,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:34,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:37:34,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [669889663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:34,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578684372] [2022-11-03 02:37:34,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:34,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:34,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:37:34,478 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:37:34,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:37:34,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:34,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:37:34,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:34,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:37:34,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:34,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:37:34,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578684372] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:34,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:37:34,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 5, 4] total 9 [2022-11-03 02:37:34,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088404900] [2022-11-03 02:37:34,683 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:37:34,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:37:34,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:34,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:37:34,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:37:34,685 INFO L87 Difference]: Start difference. First operand 105 states and 139 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 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) [2022-11-03 02:37:34,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:34,870 INFO L93 Difference]: Finished difference Result 116 states and 148 transitions. [2022-11-03 02:37:34,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:37:34,871 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 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 20 [2022-11-03 02:37:34,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:34,872 INFO L225 Difference]: With dead ends: 116 [2022-11-03 02:37:34,872 INFO L226 Difference]: Without dead ends: 114 [2022-11-03 02:37:34,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:37:34,873 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 18 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:34,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 349 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 19 Unchecked, 0.2s Time] [2022-11-03 02:37:34,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-03 02:37:34,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2022-11-03 02:37:34,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 75 states have (on average 1.7333333333333334) internal successors, (130), 99 states have internal predecessors, (130), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-03 02:37:34,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 144 transitions. [2022-11-03 02:37:34,881 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 144 transitions. Word has length 20 [2022-11-03 02:37:34,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:34,881 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 144 transitions. [2022-11-03 02:37:34,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 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) [2022-11-03 02:37:34,881 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 144 transitions. [2022-11-03 02:37:34,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 02:37:34,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:34,882 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] [2022-11-03 02:37:34,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:35,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:35,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:35,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:37:35,505 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:37:35,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:35,506 INFO L85 PathProgramCache]: Analyzing trace with hash -12644306, now seen corresponding path program 1 times [2022-11-03 02:37:35,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:35,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1304056020] [2022-11-03 02:37:35,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:35,506 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:35,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:35,507 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:35,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:37:35,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:35,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:37:35,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:35,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:37:35,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:40,102 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:40,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1304056020] [2022-11-03 02:37:40,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1304056020] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:37:40,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [831723413] [2022-11-03 02:37:40,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:40,103 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:37:40,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:37:40,105 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:37:40,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-03 02:37:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:40,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:37:40,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:40,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:37:40,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:44,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [831723413] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:37:44,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54197380] [2022-11-03 02:37:44,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:44,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:44,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:37:44,724 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:37:44,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 02:37:44,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:44,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:37:44,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:44,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:37:44,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:37:44,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:49,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54197380] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:37:49,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:37:49,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 13 [2022-11-03 02:37:49,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437132206] [2022-11-03 02:37:49,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:37:49,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 02:37:49,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:49,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 02:37:49,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=166, Unknown=2, NotChecked=0, Total=210 [2022-11-03 02:37:49,068 INFO L87 Difference]: Start difference. First operand 111 states and 144 transitions. Second operand has 14 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 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) [2022-11-03 02:37:49,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:49,374 INFO L93 Difference]: Finished difference Result 116 states and 147 transitions. [2022-11-03 02:37:49,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:37:49,375 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 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 23 [2022-11-03 02:37:49,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:49,375 INFO L225 Difference]: With dead ends: 116 [2022-11-03 02:37:49,376 INFO L226 Difference]: Without dead ends: 111 [2022-11-03 02:37:49,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 95 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=50, Invalid=220, Unknown=2, NotChecked=0, Total=272 [2022-11-03 02:37:49,377 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 7 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:49,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 313 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 135 Invalid, 0 Unknown, 96 Unchecked, 0.3s Time] [2022-11-03 02:37:49,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-03 02:37:49,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2022-11-03 02:37:49,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 69 states have (on average 1.7826086956521738) internal successors, (123), 95 states have internal predecessors, (123), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-03 02:37:49,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 137 transitions. [2022-11-03 02:37:49,382 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 137 transitions. Word has length 23 [2022-11-03 02:37:49,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:49,382 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 137 transitions. [2022-11-03 02:37:49,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 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) [2022-11-03 02:37:49,383 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 137 transitions. [2022-11-03 02:37:49,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-03 02:37:49,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:49,384 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:49,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:49,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2022-11-03 02:37:49,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:49,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:37:49,985 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:37:49,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:49,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1738347476, now seen corresponding path program 1 times [2022-11-03 02:37:49,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:49,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [990282633] [2022-11-03 02:37:49,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:49,986 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:49,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:49,987 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:49,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:37:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:50,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:37:50,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:50,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:37:50,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:37:50,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-03 02:37:50,241 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:37:50,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-03 02:37:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:37:50,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:37:50,480 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:50,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [990282633] [2022-11-03 02:37:50,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [990282633] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:50,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1842209519] [2022-11-03 02:37:50,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:50,481 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:37:50,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:37:50,485 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:37:50,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-03 02:37:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:50,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:37:50,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:50,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:37:50,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:37:50,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-03 02:37:50,717 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:37:50,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-03 02:37:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:37:50,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:50,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:37:50,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1842209519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:50,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663387691] [2022-11-03 02:37:50,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:50,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:50,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:37:50,972 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:37:50,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 02:37:51,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:51,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:37:51,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:51,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:37:51,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:37:51,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-03 02:37:53,198 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:37:53,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-03 02:37:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:37:53,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:55,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:37:55,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663387691] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:55,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:37:55,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7, 6, 7, 6] total 9 [2022-11-03 02:37:55,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243901520] [2022-11-03 02:37:55,454 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:37:55,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:37:55,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:55,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:37:55,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=69, Unknown=1, NotChecked=0, Total=90 [2022-11-03 02:37:55,455 INFO L87 Difference]: Start difference. First operand 106 states and 137 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:37:57,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:57,937 INFO L93 Difference]: Finished difference Result 116 states and 149 transitions. [2022-11-03 02:37:57,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:37:57,938 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 25 [2022-11-03 02:37:57,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:57,939 INFO L225 Difference]: With dead ends: 116 [2022-11-03 02:37:57,939 INFO L226 Difference]: Without dead ends: 116 [2022-11-03 02:37:57,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 126 SyntacticMatches, 10 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=34, Invalid=121, Unknown=1, NotChecked=0, Total=156 [2022-11-03 02:37:57,940 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 7 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:57,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 333 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 200 Invalid, 0 Unknown, 145 Unchecked, 0.4s Time] [2022-11-03 02:37:57,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-03 02:37:57,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2022-11-03 02:37:57,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 76 states have (on average 1.736842105263158) internal successors, (132), 100 states have internal predecessors, (132), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (11), 10 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-03 02:37:57,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 149 transitions. [2022-11-03 02:37:57,946 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 149 transitions. Word has length 25 [2022-11-03 02:37:57,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:57,946 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 149 transitions. [2022-11-03 02:37:57,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:37:57,946 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 149 transitions. [2022-11-03 02:37:57,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-03 02:37:57,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:57,947 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:57,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:58,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2022-11-03 02:37:58,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:58,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:37:58,561 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:37:58,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:58,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1738347475, now seen corresponding path program 1 times [2022-11-03 02:37:58,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:58,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969806487] [2022-11-03 02:37:58,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:58,562 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:58,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:58,564 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:58,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 02:37:58,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:58,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:37:58,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:58,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:37:58,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:37:58,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:37:58,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 02:37:58,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:38:02,975 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 02:38:02,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 02:38:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:38:03,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:03,343 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:38:03,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969806487] [2022-11-03 02:38:03,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969806487] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:38:03,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1348472110] [2022-11-03 02:38:03,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:03,344 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:38:03,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:38:03,349 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:38:03,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-03 02:38:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:03,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:38:03,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:03,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:38:03,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:38:03,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:38:03,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:38:03,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-11-03 02:38:03,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:38:06,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:06,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 02:38:06,105 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:38:06,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:38:06,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:38:06,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:10,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1348472110] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:38:10,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071635534] [2022-11-03 02:38:10,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:10,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:38:10,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:38:10,742 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:38:10,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-03 02:38:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:10,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:38:10,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:10,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:38:10,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:38:10,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:38:10,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:38:10,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-11-03 02:38:10,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:38:11,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:11,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 02:38:11,136 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:38:11,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:38:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:38:11,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:15,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071635534] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:38:15,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:38:15,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-11-03 02:38:15,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018517172] [2022-11-03 02:38:15,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:38:15,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:38:15,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:38:15,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:38:15,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=290, Unknown=4, NotChecked=0, Total=342 [2022-11-03 02:38:15,448 INFO L87 Difference]: Start difference. First operand 114 states and 149 transitions. Second operand has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-03 02:38:18,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:18,223 INFO L93 Difference]: Finished difference Result 116 states and 149 transitions. [2022-11-03 02:38:18,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:38:18,223 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 25 [2022-11-03 02:38:18,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:18,224 INFO L225 Difference]: With dead ends: 116 [2022-11-03 02:38:18,225 INFO L226 Difference]: Without dead ends: 116 [2022-11-03 02:38:18,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=76, Invalid=425, Unknown=5, NotChecked=0, Total=506 [2022-11-03 02:38:18,226 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 14 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:18,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 448 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 280 Invalid, 0 Unknown, 78 Unchecked, 0.6s Time] [2022-11-03 02:38:18,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-03 02:38:18,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2022-11-03 02:38:18,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 76 states have (on average 1.7105263157894737) internal successors, (130), 100 states have internal predecessors, (130), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (11), 10 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-03 02:38:18,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 147 transitions. [2022-11-03 02:38:18,231 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 147 transitions. Word has length 25 [2022-11-03 02:38:18,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:18,232 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 147 transitions. [2022-11-03 02:38:18,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-03 02:38:18,232 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 147 transitions. [2022-11-03 02:38:18,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-03 02:38:18,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:18,233 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] [2022-11-03 02:38:18,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:18,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:18,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:18,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:38:18,845 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:38:18,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:18,845 INFO L85 PathProgramCache]: Analyzing trace with hash 2051061195, now seen corresponding path program 1 times [2022-11-03 02:38:18,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:38:18,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [701141629] [2022-11-03 02:38:18,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:18,846 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:38:18,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:38:18,847 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:38:18,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 02:38:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:18,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:38:18,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:18,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:38:18,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:38:19,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:38:19,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:38:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:38:19,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:38:19,043 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:38:19,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [701141629] [2022-11-03 02:38:19,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [701141629] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:38:19,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:38:19,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:38:19,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306766190] [2022-11-03 02:38:19,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:38:19,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:38:19,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:38:19,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:38:19,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:38:19,044 INFO L87 Difference]: Start difference. First operand 114 states and 147 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 02:38:19,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:19,214 INFO L93 Difference]: Finished difference Result 108 states and 136 transitions. [2022-11-03 02:38:19,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:38:19,215 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-11-03 02:38:19,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:19,216 INFO L225 Difference]: With dead ends: 108 [2022-11-03 02:38:19,216 INFO L226 Difference]: Without dead ends: 102 [2022-11-03 02:38:19,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:38:19,217 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 2 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:19,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 331 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:38:19,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-03 02:38:19,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-11-03 02:38:19,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 68 states have (on average 1.7205882352941178) internal successors, (117), 91 states have internal predecessors, (117), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 02:38:19,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 130 transitions. [2022-11-03 02:38:19,221 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 130 transitions. Word has length 25 [2022-11-03 02:38:19,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:19,221 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 130 transitions. [2022-11-03 02:38:19,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 02:38:19,222 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 130 transitions. [2022-11-03 02:38:19,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 02:38:19,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:19,222 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] [2022-11-03 02:38:19,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:19,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:38:19,433 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:38:19,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:19,434 INFO L85 PathProgramCache]: Analyzing trace with hash 190353901, now seen corresponding path program 1 times [2022-11-03 02:38:19,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:38:19,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1174840937] [2022-11-03 02:38:19,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:19,435 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:38:19,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:38:19,436 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:38:19,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 02:38:19,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:19,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:38:19,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:19,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:38:19,609 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:38:19,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-03 02:38:19,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:38:19,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:38:19,623 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:38:19,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1174840937] [2022-11-03 02:38:19,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1174840937] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:38:19,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:38:19,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:38:19,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909305641] [2022-11-03 02:38:19,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:38:19,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:38:19,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:38:19,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:38:19,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:38:19,625 INFO L87 Difference]: Start difference. First operand 102 states and 130 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 02:38:19,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:19,797 INFO L93 Difference]: Finished difference Result 105 states and 129 transitions. [2022-11-03 02:38:19,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:38:19,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-11-03 02:38:19,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:19,798 INFO L225 Difference]: With dead ends: 105 [2022-11-03 02:38:19,799 INFO L226 Difference]: Without dead ends: 105 [2022-11-03 02:38:19,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:38:19,799 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 36 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:19,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 127 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 85 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-11-03 02:38:19,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-03 02:38:19,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2022-11-03 02:38:19,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 68 states have (on average 1.7058823529411764) internal successors, (116), 90 states have internal predecessors, (116), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 02:38:19,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 129 transitions. [2022-11-03 02:38:19,804 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 129 transitions. Word has length 27 [2022-11-03 02:38:19,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:19,805 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 129 transitions. [2022-11-03 02:38:19,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 02:38:19,806 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 129 transitions. [2022-11-03 02:38:19,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 02:38:19,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:19,807 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] [2022-11-03 02:38:19,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:20,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:38:20,017 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:38:20,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:20,017 INFO L85 PathProgramCache]: Analyzing trace with hash 190353902, now seen corresponding path program 1 times [2022-11-03 02:38:20,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:38:20,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [114620037] [2022-11-03 02:38:20,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:20,018 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:38:20,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:38:20,020 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:38:20,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 02:38:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:20,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 02:38:20,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:20,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:38:20,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:38:22,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:22,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 02:38:22,387 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:38:22,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:38:22,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:22,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 02:38:22,551 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:38:22,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:38:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:38:22,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:26,893 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:38:26,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [114620037] [2022-11-03 02:38:26,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [114620037] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:38:26,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [813730910] [2022-11-03 02:38:26,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:26,893 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:38:26,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:38:26,894 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:38:26,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-03 02:38:27,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:27,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 02:38:27,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:27,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:38:27,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:38:27,227 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:38:27,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:38:27,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 02:38:27,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:38:27,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-11-03 02:38:27,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:27,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 02:38:27,500 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:38:27,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:38:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:38:27,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:27,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [813730910] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:38:27,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545960470] [2022-11-03 02:38:27,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:27,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:38:27,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:38:27,767 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:38:27,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-03 02:38:27,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:27,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:38:27,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:27,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:38:27,890 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:38:28,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:28,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 02:38:28,030 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:38:28,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:38:30,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:38:30,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 02:38:30,196 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:38:30,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:38:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:38:30,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:33,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545960470] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:38:33,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:38:33,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8] total 11 [2022-11-03 02:38:33,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707247486] [2022-11-03 02:38:33,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:38:33,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 02:38:33,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:38:33,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 02:38:33,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=145, Unknown=1, NotChecked=0, Total=182 [2022-11-03 02:38:33,128 INFO L87 Difference]: Start difference. First operand 101 states and 129 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:38:33,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:33,858 INFO L93 Difference]: Finished difference Result 127 states and 150 transitions. [2022-11-03 02:38:33,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:38:33,858 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-11-03 02:38:33,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:33,860 INFO L225 Difference]: With dead ends: 127 [2022-11-03 02:38:33,860 INFO L226 Difference]: Without dead ends: 127 [2022-11-03 02:38:33,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=54, Invalid=217, Unknown=1, NotChecked=0, Total=272 [2022-11-03 02:38:33,861 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 53 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:33,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 303 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 381 Invalid, 0 Unknown, 110 Unchecked, 0.6s Time] [2022-11-03 02:38:33,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-03 02:38:33,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 87. [2022-11-03 02:38:33,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 56 states have (on average 1.6428571428571428) internal successors, (92), 78 states have internal predecessors, (92), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 02:38:33,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2022-11-03 02:38:33,866 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 27 [2022-11-03 02:38:33,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:33,866 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2022-11-03 02:38:33,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:38:33,867 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2022-11-03 02:38:33,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 02:38:33,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:33,868 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] [2022-11-03 02:38:33,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:34,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:34,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-11-03 02:38:34,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:38:34,471 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:38:34,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:34,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1606003645, now seen corresponding path program 1 times [2022-11-03 02:38:34,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:38:34,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277428935] [2022-11-03 02:38:34,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:34,472 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:38:34,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:38:34,473 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:38:34,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 02:38:34,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:34,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:38:34,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:34,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:38:34,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:38:34,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:38:34,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:38:34,834 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 02:38:34,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-11-03 02:38:34,944 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:38:34,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 46 [2022-11-03 02:38:34,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:38:34,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:35,120 INFO L356 Elim1Store]: treesize reduction 7, result has 68.2 percent of original size [2022-11-03 02:38:35,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 68 [2022-11-03 02:38:35,191 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:38:35,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277428935] [2022-11-03 02:38:35,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277428935] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:38:35,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [977357886] [2022-11-03 02:38:35,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:35,191 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:38:35,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:38:35,193 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:38:35,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-03 02:38:35,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:35,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:38:35,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:35,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:38:35,546 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:38:35,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:38:35,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:38:37,706 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_31| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_12| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_31| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_31|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_12|)))) is different from true [2022-11-03 02:38:37,821 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 02:38:37,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2022-11-03 02:38:37,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-03 02:38:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-11-03 02:38:37,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:37,925 INFO L356 Elim1Store]: treesize reduction 7, result has 58.8 percent of original size [2022-11-03 02:38:37,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:38:37,933 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_413 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_413) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) |c_ULTIMATE.start_entry_point_#t~mem47#1.base|)) is different from false [2022-11-03 02:38:37,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [977357886] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:38:37,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524101074] [2022-11-03 02:38:37,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:37,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:38:37,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:38:37,945 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:38:37,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-03 02:38:38,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:38,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:38:38,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:38,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:38:38,136 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:38:38,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:38:38,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:38:40,171 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_13| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_33| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_33| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_33|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_13|)))) is different from true [2022-11-03 02:38:40,269 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 02:38:40,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2022-11-03 02:38:40,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-03 02:38:40,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-11-03 02:38:40,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:40,325 INFO L356 Elim1Store]: treesize reduction 7, result has 58.8 percent of original size [2022-11-03 02:38:40,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:38:40,334 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_435 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_435) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) |c_ULTIMATE.start_entry_point_#t~mem47#1.base|)) is different from false [2022-11-03 02:38:40,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524101074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:38:40,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:38:40,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 21 [2022-11-03 02:38:40,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669319261] [2022-11-03 02:38:40,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:38:40,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 02:38:40,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:38:40,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 02:38:40,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=452, Unknown=4, NotChecked=180, Total=702 [2022-11-03 02:38:40,349 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand has 22 states, 20 states have (on average 1.85) internal successors, (37), 17 states have internal predecessors, (37), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 02:38:54,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:54,871 INFO L93 Difference]: Finished difference Result 139 states and 153 transitions. [2022-11-03 02:38:54,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-03 02:38:54,872 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.85) internal successors, (37), 17 states have internal predecessors, (37), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 28 [2022-11-03 02:38:54,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:54,873 INFO L225 Difference]: With dead ends: 139 [2022-11-03 02:38:54,873 INFO L226 Difference]: Without dead ends: 139 [2022-11-03 02:38:54,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=250, Invalid=1482, Unknown=6, NotChecked=332, Total=2070 [2022-11-03 02:38:54,875 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 176 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:54,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 663 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 983 Invalid, 0 Unknown, 247 Unchecked, 1.5s Time] [2022-11-03 02:38:54,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-03 02:38:54,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 85. [2022-11-03 02:38:54,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 55 states have (on average 1.5818181818181818) internal successors, (87), 75 states have internal predecessors, (87), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 02:38:54,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2022-11-03 02:38:54,880 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 28 [2022-11-03 02:38:54,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:54,880 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2022-11-03 02:38:54,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.85) internal successors, (37), 17 states have internal predecessors, (37), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 02:38:54,881 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2022-11-03 02:38:54,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 02:38:54,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:54,881 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] [2022-11-03 02:38:54,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:55,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:55,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:55,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:38:55,505 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:38:55,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:55,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1606003646, now seen corresponding path program 1 times [2022-11-03 02:38:55,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:38:55,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012738869] [2022-11-03 02:38:55,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:55,506 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:38:55,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:38:55,507 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:38:55,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 02:38:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:55,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:38:55,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:55,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:38:55,749 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:38:55,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:38:55,779 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:38:55,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:38:56,071 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 02:38:56,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2022-11-03 02:38:56,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2022-11-03 02:38:56,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-03 02:38:56,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-11-03 02:38:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:56,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:56,462 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:38:56,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 54 [2022-11-03 02:38:56,572 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_prenex_8 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_prenex_8) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse1 (bvadd (_ bv4 32) .cse1)))))) (and (forall ((v_ArrVal_460 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_460) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) (_ bv4 32)) (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset|))) (or (forall ((v_ArrVal_459 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_459) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) |c_ULTIMATE.start_entry_point_#t~mem47#1.base|)) (and (forall ((v_ArrVal_460 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_460) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) (_ bv4 32)) (_ bv0 32))) .cse0)) .cse0)) is different from false [2022-11-03 02:38:56,618 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:38:56,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012738869] [2022-11-03 02:38:56,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012738869] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:38:56,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [492320599] [2022-11-03 02:38:56,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:56,618 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:38:56,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:38:56,621 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:38:56,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-03 02:38:56,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:56,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:38:56,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:56,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:38:56,894 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:38:56,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:38:56,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:38:56,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:38:57,120 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 02:38:57,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2022-11-03 02:38:57,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2022-11-03 02:38:57,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-03 02:38:57,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-11-03 02:38:57,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:57,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:57,291 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:38:57,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 54 [2022-11-03 02:38:57,408 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_485 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_485) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse1 (bvadd .cse1 (_ bv4 32))))))) (and (or (and (forall ((v_prenex_11 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_prenex_11) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (_ bv0 32))) .cse0) (forall ((v_ArrVal_484 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_484) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) |c_ULTIMATE.start_entry_point_#t~mem47#1.base|))) .cse0 (forall ((v_prenex_11 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_prenex_11) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset|))))) is different from false [2022-11-03 02:38:57,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [492320599] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:38:57,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108077078] [2022-11-03 02:38:57,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:57,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:38:57,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:38:57,459 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:38:57,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-03 02:38:57,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:57,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:38:57,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:57,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:38:57,618 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:38:57,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:38:57,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:38:57,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:38:57,847 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 02:38:57,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2022-11-03 02:38:57,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2022-11-03 02:38:57,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-03 02:38:57,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-11-03 02:38:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:57,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:58,003 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:38:58,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 54 [2022-11-03 02:38:58,096 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_509 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_509) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse1 (bvadd (_ bv4 32) .cse1)))))) (and .cse0 (or (and .cse0 (forall ((v_prenex_14 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_prenex_14) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) (_ bv4 32)) (_ bv0 32)))) (forall ((v_ArrVal_510 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_510) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) |c_ULTIMATE.start_entry_point_#t~mem47#1.base|))) (forall ((v_prenex_14 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_prenex_14) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) (_ bv4 32)) (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset|))))) is different from false [2022-11-03 02:38:58,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108077078] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:38:58,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:38:58,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 12 [2022-11-03 02:38:58,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619756649] [2022-11-03 02:38:58,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:38:58,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:38:58,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:38:58,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:38:58,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=179, Unknown=3, NotChecked=84, Total=306 [2022-11-03 02:38:58,142 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:38:59,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:59,140 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2022-11-03 02:38:59,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:38:59,141 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2022-11-03 02:38:59,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:59,142 INFO L225 Difference]: With dead ends: 102 [2022-11-03 02:38:59,142 INFO L226 Difference]: Without dead ends: 102 [2022-11-03 02:38:59,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=99, Invalid=462, Unknown=3, NotChecked=138, Total=702 [2022-11-03 02:38:59,143 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 74 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:59,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 301 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 401 Invalid, 0 Unknown, 29 Unchecked, 0.7s Time] [2022-11-03 02:38:59,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-03 02:38:59,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 84. [2022-11-03 02:38:59,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 55 states have (on average 1.5636363636363637) internal successors, (86), 74 states have internal predecessors, (86), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-03 02:38:59,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2022-11-03 02:38:59,147 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 28 [2022-11-03 02:38:59,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:59,148 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2022-11-03 02:38:59,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:38:59,148 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2022-11-03 02:38:59,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 02:38:59,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:59,149 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] [2022-11-03 02:38:59,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:59,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:59,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:59,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:38:59,752 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:38:59,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:59,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1476244126, now seen corresponding path program 1 times [2022-11-03 02:38:59,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:38:59,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [219935360] [2022-11-03 02:38:59,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:59,753 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:38:59,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:38:59,757 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:38:59,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 02:38:59,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:59,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:38:59,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:59,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:38:59,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:38:59,897 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:38:59,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [219935360] [2022-11-03 02:38:59,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [219935360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:38:59,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:38:59,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:38:59,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278385221] [2022-11-03 02:38:59,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:38:59,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:38:59,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:38:59,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:38:59,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:38:59,899 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-11-03 02:39:00,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:00,031 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2022-11-03 02:39:00,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:39:00,032 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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 30 [2022-11-03 02:39:00,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:00,032 INFO L225 Difference]: With dead ends: 83 [2022-11-03 02:39:00,033 INFO L226 Difference]: Without dead ends: 83 [2022-11-03 02:39:00,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:00,033 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 30 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:00,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 95 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:39:00,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-03 02:39:00,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-11-03 02:39:00,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 55 states have (on average 1.5454545454545454) internal successors, (85), 73 states have internal predecessors, (85), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-03 02:39:00,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2022-11-03 02:39:00,037 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 30 [2022-11-03 02:39:00,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:00,038 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2022-11-03 02:39:00,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-11-03 02:39:00,038 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2022-11-03 02:39:00,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 02:39:00,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:00,039 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] [2022-11-03 02:39:00,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:00,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:00,249 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:39:00,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:00,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1476244127, now seen corresponding path program 1 times [2022-11-03 02:39:00,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:00,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542820499] [2022-11-03 02:39:00,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:00,250 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:00,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:00,251 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:00,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 02:39:00,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:00,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:39:00,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:39:00,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:00,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-03 02:39:00,813 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:39:00,813 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:00,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542820499] [2022-11-03 02:39:00,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542820499] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:00,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1458012569] [2022-11-03 02:39:00,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:00,814 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:39:00,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:39:00,817 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:39:00,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-03 02:39:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:01,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:39:01,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:01,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:39:01,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:01,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-03 02:39:01,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:39:01,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1458012569] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:01,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301567109] [2022-11-03 02:39:01,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:01,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:39:01,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:39:01,207 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:39:01,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-03 02:39:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:01,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:39:01,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:01,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:39:01,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:01,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-03 02:39:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:39:01,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301567109] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:01,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:39:01,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 11 [2022-11-03 02:39:01,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70514722] [2022-11-03 02:39:01,514 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:39:01,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 02:39:01,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:01,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 02:39:01,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:39:01,515 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-03 02:39:02,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:02,008 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2022-11-03 02:39:02,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:39:02,009 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2022-11-03 02:39:02,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:02,010 INFO L225 Difference]: With dead ends: 81 [2022-11-03 02:39:02,010 INFO L226 Difference]: Without dead ends: 81 [2022-11-03 02:39:02,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:39:02,011 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 152 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:02,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 231 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:39:02,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-03 02:39:02,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2022-11-03 02:39:02,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 50 states have (on average 1.44) internal successors, (72), 66 states have internal predecessors, (72), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-03 02:39:02,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2022-11-03 02:39:02,018 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 30 [2022-11-03 02:39:02,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:02,020 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2022-11-03 02:39:02,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-03 02:39:02,020 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2022-11-03 02:39:02,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:39:02,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:02,023 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] [2022-11-03 02:39:02,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:02,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:02,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:02,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:02,633 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:39:02,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:02,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1481073420, now seen corresponding path program 1 times [2022-11-03 02:39:02,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:02,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521347714] [2022-11-03 02:39:02,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:02,634 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:02,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:02,635 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:02,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 02:39:02,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:02,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:39:02,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:02,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:39:02,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:39:02,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 02:39:03,025 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 02:39:03,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 21 [2022-11-03 02:39:03,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:39:03,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:39:03,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:03,084 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:03,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521347714] [2022-11-03 02:39:03,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521347714] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:03,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:03,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-03 02:39:03,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916947295] [2022-11-03 02:39:03,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:03,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 02:39:03,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:03,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 02:39:03,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:39:03,086 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:39:03,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:03,445 INFO L93 Difference]: Finished difference Result 132 states and 141 transitions. [2022-11-03 02:39:03,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:39:03,446 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2022-11-03 02:39:03,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:03,447 INFO L225 Difference]: With dead ends: 132 [2022-11-03 02:39:03,448 INFO L226 Difference]: Without dead ends: 132 [2022-11-03 02:39:03,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:39:03,449 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 96 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:03,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 404 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 202 Invalid, 0 Unknown, 20 Unchecked, 0.3s Time] [2022-11-03 02:39:03,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-03 02:39:03,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 85. [2022-11-03 02:39:03,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 58 states have (on average 1.396551724137931) internal successors, (81), 74 states have internal predecessors, (81), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 02:39:03,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2022-11-03 02:39:03,453 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 31 [2022-11-03 02:39:03,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:03,453 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2022-11-03 02:39:03,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:39:03,454 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2022-11-03 02:39:03,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:39:03,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:03,454 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] [2022-11-03 02:39:03,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:03,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:03,667 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:39:03,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:03,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1481072329, now seen corresponding path program 1 times [2022-11-03 02:39:03,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:03,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1587656459] [2022-11-03 02:39:03,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:03,668 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:03,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:03,669 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:03,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 02:39:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:03,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:39:03,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:03,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-03 02:39:03,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:39:03,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:03,841 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:03,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1587656459] [2022-11-03 02:39:03,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1587656459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:03,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:03,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:39:03,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923648872] [2022-11-03 02:39:03,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:03,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:39:03,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:03,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:39:03,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:39:03,842 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 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) [2022-11-03 02:39:04,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:04,132 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2022-11-03 02:39:04,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:39:04,133 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 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 31 [2022-11-03 02:39:04,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:04,134 INFO L225 Difference]: With dead ends: 90 [2022-11-03 02:39:04,134 INFO L226 Difference]: Without dead ends: 90 [2022-11-03 02:39:04,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:39:04,135 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 16 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:04,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 173 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:39:04,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-03 02:39:04,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2022-11-03 02:39:04,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 58 states have (on average 1.3793103448275863) internal successors, (80), 73 states have internal predecessors, (80), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 02:39:04,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2022-11-03 02:39:04,138 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 31 [2022-11-03 02:39:04,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:04,139 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2022-11-03 02:39:04,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 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) [2022-11-03 02:39:04,139 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2022-11-03 02:39:04,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:39:04,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:04,139 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] [2022-11-03 02:39:04,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:04,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:04,340 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:39:04,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:04,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1481072328, now seen corresponding path program 1 times [2022-11-03 02:39:04,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:04,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500247215] [2022-11-03 02:39:04,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:04,341 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:04,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:04,342 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:04,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 02:39:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:04,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:39:04,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:04,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-11-03 02:39:04,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2022-11-03 02:39:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:39:04,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:04,643 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:04,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500247215] [2022-11-03 02:39:04,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500247215] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:04,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:04,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:39:04,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733750408] [2022-11-03 02:39:04,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:04,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:39:04,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:04,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:39:04,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:39:04,644 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 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) [2022-11-03 02:39:05,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:05,387 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2022-11-03 02:39:05,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:39:05,388 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 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 31 [2022-11-03 02:39:05,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:05,388 INFO L225 Difference]: With dead ends: 97 [2022-11-03 02:39:05,388 INFO L226 Difference]: Without dead ends: 97 [2022-11-03 02:39:05,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:39:05,389 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 21 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:05,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 185 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:39:05,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-03 02:39:05,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 83. [2022-11-03 02:39:05,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 58 states have (on average 1.3620689655172413) internal successors, (79), 72 states have internal predecessors, (79), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 02:39:05,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2022-11-03 02:39:05,393 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 31 [2022-11-03 02:39:05,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:05,394 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2022-11-03 02:39:05,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 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) [2022-11-03 02:39:05,394 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2022-11-03 02:39:05,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:39:05,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:05,395 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] [2022-11-03 02:39:05,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-11-03 02:39:05,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:05,595 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:39:05,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:05,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1677586925, now seen corresponding path program 1 times [2022-11-03 02:39:05,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:05,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1726534653] [2022-11-03 02:39:05,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:05,596 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:05,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:05,597 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:05,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 02:39:05,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:05,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:39:05,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:05,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:39:05,796 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:39:05,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:39:05,829 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:39:05,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:39:05,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-03 02:39:06,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 02:39:06,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:39:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:06,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:06,095 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_664 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_664) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) (_ bv0 32))) is different from false [2022-11-03 02:39:06,103 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:06,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1726534653] [2022-11-03 02:39:06,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1726534653] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:39:06,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [807113764] [2022-11-03 02:39:06,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:06,104 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:39:06,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:39:06,105 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:39:06,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-03 02:39:06,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:06,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 02:39:06,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:06,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:39:06,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:39:06,456 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:39:06,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:39:06,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:39:06,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-03 02:39:08,783 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 02:39:08,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-03 02:39:08,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 02:39:08,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-03 02:39:08,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:39:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:08,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:09,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-11-03 02:39:09,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [807113764] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:39:09,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522641764] [2022-11-03 02:39:09,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:09,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:39:09,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:39:09,440 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:39:09,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-03 02:39:09,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:09,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:39:09,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:09,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:39:09,592 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:39:09,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:39:09,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:39:09,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:39:09,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-03 02:39:09,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 02:39:09,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:39:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:09,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:09,788 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_707 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_707) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) (_ bv0 32))) is different from false [2022-11-03 02:39:09,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522641764] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:39:09,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:39:09,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 12] total 19 [2022-11-03 02:39:09,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358843118] [2022-11-03 02:39:09,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:39:09,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:39:09,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:09,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:39:09,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=447, Unknown=6, NotChecked=86, Total=600 [2022-11-03 02:39:09,797 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 17 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-03 02:39:15,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:15,545 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2022-11-03 02:39:15,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 02:39:15,546 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 17 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 31 [2022-11-03 02:39:15,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:15,547 INFO L225 Difference]: With dead ends: 101 [2022-11-03 02:39:15,547 INFO L226 Difference]: Without dead ends: 101 [2022-11-03 02:39:15,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=189, Invalid=1145, Unknown=6, NotChecked=142, Total=1482 [2022-11-03 02:39:15,549 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 86 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:15,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 508 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 703 Invalid, 0 Unknown, 94 Unchecked, 1.1s Time] [2022-11-03 02:39:15,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-03 02:39:15,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 75. [2022-11-03 02:39:15,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 51 states have (on average 1.392156862745098) internal successors, (71), 65 states have internal predecessors, (71), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-03 02:39:15,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2022-11-03 02:39:15,553 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 31 [2022-11-03 02:39:15,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:15,554 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2022-11-03 02:39:15,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 17 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-03 02:39:15,554 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2022-11-03 02:39:15,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-03 02:39:15,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:15,555 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] [2022-11-03 02:39:15,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:15,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:15,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:16,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:39:16,165 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:39:16,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:16,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1331364346, now seen corresponding path program 1 times [2022-11-03 02:39:16,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:16,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190465927] [2022-11-03 02:39:16,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:16,166 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:16,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:16,166 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:16,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 02:39:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:16,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:39:16,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:16,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:39:16,363 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:39:16,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:39:16,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:39:18,458 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_48| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_34| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_48| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_48|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_34|)))) is different from true [2022-11-03 02:39:20,611 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-03 02:39:20,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2022-11-03 02:39:20,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2022-11-03 02:39:20,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-11-03 02:39:20,727 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-03 02:39:20,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2022-11-03 02:39:20,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-03 02:39:20,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:20,853 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_731 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base|) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset| |c_ULTIMATE.start_entry_point_#t~ret48#1.base|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_731) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (_ bv0 32)))) is different from false [2022-11-03 02:39:20,892 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret48#1.base_65| (_ BitVec 32))) (or (forall ((v_ArrVal_731 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base|) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset| |v_ULTIMATE.start_entry_point_#t~ret48#1.base_65|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_731) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (_ bv0 32)))) (= |v_ULTIMATE.start_entry_point_#t~ret48#1.base_65| (_ bv0 32)))) is different from false [2022-11-03 02:39:20,896 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:20,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190465927] [2022-11-03 02:39:20,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190465927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:39:20,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2127949239] [2022-11-03 02:39:20,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:20,896 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:39:20,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:39:20,897 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:39:20,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-03 02:39:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:21,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:39:21,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:21,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:39:21,223 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:39:21,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:39:21,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:39:21,645 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 02:39:21,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-11-03 02:39:21,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-03 02:39:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:21,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:21,818 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_753 (Array (_ BitVec 32) (_ BitVec 32)))) (bvult (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_753) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) |c_#StackHeapBarrier|)) is different from false [2022-11-03 02:39:21,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2127949239] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:39:21,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306661183] [2022-11-03 02:39:21,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:21,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:39:21,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:39:21,827 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:39:21,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-03 02:39:21,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:21,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:39:21,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:21,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:39:22,037 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:39:22,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:39:22,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:39:22,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:39:22,193 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:39:24,274 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_52| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_36| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_52|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_36|) |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_52|))) is different from true [2022-11-03 02:39:24,479 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 02:39:24,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2022-11-03 02:39:24,713 INFO L356 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2022-11-03 02:39:24,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 27 [2022-11-03 02:39:24,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-03 02:39:24,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-03 02:39:24,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:25,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-03 02:39:51,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306661183] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:39:51,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:39:51,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 18] total 33 [2022-11-03 02:39:51,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621787197] [2022-11-03 02:39:51,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:39:51,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-03 02:39:51,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:51,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-03 02:39:51,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1293, Unknown=15, NotChecked=380, Total=1806 [2022-11-03 02:39:51,418 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 33 states, 31 states have (on average 1.935483870967742) internal successors, (60), 27 states have internal predecessors, (60), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 02:39:53,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:53,897 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2022-11-03 02:39:53,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 02:39:53,898 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.935483870967742) internal successors, (60), 27 states have internal predecessors, (60), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 32 [2022-11-03 02:39:53,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:53,899 INFO L225 Difference]: With dead ends: 104 [2022-11-03 02:39:53,899 INFO L226 Difference]: Without dead ends: 104 [2022-11-03 02:39:53,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 35.3s TimeCoverageRelationStatistics Valid=307, Invalid=2668, Unknown=15, NotChecked=550, Total=3540 [2022-11-03 02:39:53,900 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 136 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 284 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:53,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 525 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 733 Invalid, 0 Unknown, 284 Unchecked, 1.2s Time] [2022-11-03 02:39:53,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-03 02:39:53,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 83. [2022-11-03 02:39:53,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 72 states have internal predecessors, (78), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 02:39:53,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2022-11-03 02:39:53,904 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 32 [2022-11-03 02:39:53,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:53,904 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2022-11-03 02:39:53,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.935483870967742) internal successors, (60), 27 states have internal predecessors, (60), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 02:39:53,905 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2022-11-03 02:39:53,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-03 02:39:53,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:53,905 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] [2022-11-03 02:39:53,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:54,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:54,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2022-11-03 02:39:54,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:39:54,515 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:39:54,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:54,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1548295403, now seen corresponding path program 1 times [2022-11-03 02:39:54,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:54,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2072329139] [2022-11-03 02:39:54,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:54,516 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:54,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:54,518 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:54,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 02:39:54,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:54,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:39:54,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:54,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-03 02:39:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:39:54,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:54,679 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:54,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2072329139] [2022-11-03 02:39:54,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2072329139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:54,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:54,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:39:54,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391429506] [2022-11-03 02:39:54,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:54,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:39:54,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:54,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:39:54,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:39:54,680 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 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) [2022-11-03 02:39:54,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:54,877 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2022-11-03 02:39:54,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:39:54,878 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 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 33 [2022-11-03 02:39:54,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:54,879 INFO L225 Difference]: With dead ends: 84 [2022-11-03 02:39:54,879 INFO L226 Difference]: Without dead ends: 84 [2022-11-03 02:39:54,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:39:54,879 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 6 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:54,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 141 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:39:54,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-03 02:39:54,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-11-03 02:39:54,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 59 states have (on average 1.3389830508474576) internal successors, (79), 73 states have internal predecessors, (79), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 02:39:54,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2022-11-03 02:39:54,888 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 33 [2022-11-03 02:39:54,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:54,888 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2022-11-03 02:39:54,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 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) [2022-11-03 02:39:54,889 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2022-11-03 02:39:54,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-03 02:39:54,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:54,889 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] [2022-11-03 02:39:54,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:55,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:55,093 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:39:55,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:55,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1853194185, now seen corresponding path program 1 times [2022-11-03 02:39:55,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:55,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121162973] [2022-11-03 02:39:55,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:55,094 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:55,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:55,095 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:55,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-03 02:39:55,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:55,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:39:55,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:55,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:39:55,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:39:55,669 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:55,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121162973] [2022-11-03 02:39:55,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121162973] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:55,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [104940482] [2022-11-03 02:39:55,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:55,669 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:39:55,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:39:55,670 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:39:55,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-03 02:39:55,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:55,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:39:55,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:55,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:39:55,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:56,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:39:56,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [104940482] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:56,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637983329] [2022-11-03 02:39:56,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:56,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:39:56,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:39:56,025 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:39:56,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-03 02:39:56,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:56,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:39:56,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:39:56,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:39:56,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637983329] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:56,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:39:56,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 5, 4] total 9 [2022-11-03 02:39:56,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862989555] [2022-11-03 02:39:56,357 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:39:56,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:39:56,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:56,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:39:56,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:39:56,358 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 10 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 4 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:39:56,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:56,623 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2022-11-03 02:39:56,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:39:56,624 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 4 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 35 [2022-11-03 02:39:56,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:56,625 INFO L225 Difference]: With dead ends: 83 [2022-11-03 02:39:56,625 INFO L226 Difference]: Without dead ends: 83 [2022-11-03 02:39:56,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 189 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:39:56,625 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 90 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:56,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 170 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 150 Invalid, 0 Unknown, 12 Unchecked, 0.3s Time] [2022-11-03 02:39:56,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-03 02:39:56,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-11-03 02:39:56,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 72 states have internal predecessors, (78), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 02:39:56,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2022-11-03 02:39:56,629 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 35 [2022-11-03 02:39:56,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:56,629 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2022-11-03 02:39:56,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 4 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:39:56,629 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2022-11-03 02:39:56,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-03 02:39:56,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:56,630 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, 1, 1, 1, 1] [2022-11-03 02:39:56,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:56,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:57,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:57,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:57,231 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:39:57,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:57,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1617154909, now seen corresponding path program 1 times [2022-11-03 02:39:57,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:57,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [788789903] [2022-11-03 02:39:57,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:57,232 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:57,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:57,233 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:57,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-03 02:39:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:57,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:39:57,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:57,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:39:57,463 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:39:57,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:39:57,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:39:59,557 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_37| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_66| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_66| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_66|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_37|)))) is different from true [2022-11-03 02:39:59,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:40:03,719 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-03 02:40:03,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2022-11-03 02:40:03,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-03 02:40:03,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-11-03 02:40:03,903 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-03 02:40:03,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 18 [2022-11-03 02:40:04,044 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:40:04,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-03 02:40:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2022-11-03 02:40:04,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:08,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 76 [2022-11-03 02:40:08,692 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_872 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_entry_point_#t~ret48#1.base_83| (_ BitVec 32))) (= |v_ULTIMATE.start_entry_point_#t~ret48#1.base_83| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base|) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset| |v_ULTIMATE.start_entry_point_#t~ret48#1.base_83|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_872) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))) is different from false [2022-11-03 02:40:08,695 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:40:08,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [788789903] [2022-11-03 02:40:08,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [788789903] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:40:08,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [521524569] [2022-11-03 02:40:08,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:08,696 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:40:08,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:40:08,698 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:40:08,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-03 02:40:08,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:08,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 02:40:08,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:08,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:40:11,182 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:40:11,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:40:11,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:40:11,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:40:13,415 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_68| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_68| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_68|) (_ bv0 32))))) is different from true [2022-11-03 02:40:13,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:40:21,705 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-03 02:40:21,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2022-11-03 02:40:21,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-03 02:40:21,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-11-03 02:40:22,078 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-03 02:40:22,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 18 [2022-11-03 02:40:22,189 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:40:22,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-03 02:40:22,192 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2022-11-03 02:40:22,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:22,460 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_905 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (select |c_#valid| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base|) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset| |c_ULTIMATE.start_entry_point_#t~ret48#1.base|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_905) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (_ bv1 1)) (_ bv0 1))) is different from false [2022-11-03 02:40:22,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 76 [2022-11-03 02:40:22,496 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret48#1.base_86| (_ BitVec 32)) (v_ArrVal_905 (Array (_ BitVec 32) (_ BitVec 32)))) (= |v_ULTIMATE.start_entry_point_#t~ret48#1.base_86| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base|) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset| |v_ULTIMATE.start_entry_point_#t~ret48#1.base_86|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_905) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))) is different from false [2022-11-03 02:40:22,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [521524569] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:40:22,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403809389] [2022-11-03 02:40:22,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:22,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:22,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:40:22,500 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:40:22,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-03 02:40:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:22,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:40:22,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:22,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:40:22,671 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:40:22,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:40:22,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:40:22,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:40:24,719 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_70| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_40| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_70| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_70|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_40|)))) is different from true [2022-11-03 02:40:24,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:40:26,810 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-03 02:40:26,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2022-11-03 02:40:26,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-03 02:40:26,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-11-03 02:40:26,894 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-03 02:40:26,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 18 [2022-11-03 02:40:27,003 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:40:27,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-03 02:40:27,008 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2022-11-03 02:40:27,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:27,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 76 [2022-11-03 02:40:27,465 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_872 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_entry_point_#t~ret48#1.base_89| (_ BitVec 32))) (= |v_ULTIMATE.start_entry_point_#t~ret48#1.base_89| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base|) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset| |v_ULTIMATE.start_entry_point_#t~ret48#1.base_89|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_872) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))) is different from false [2022-11-03 02:40:27,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403809389] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:40:27,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:40:27,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 30 [2022-11-03 02:40:27,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841452442] [2022-11-03 02:40:27,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:40:27,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-03 02:40:27,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:40:27,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-03 02:40:27,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=953, Unknown=19, NotChecked=476, Total=1560 [2022-11-03 02:40:27,470 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand has 31 states, 28 states have (on average 1.75) internal successors, (49), 25 states have internal predecessors, (49), 6 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-03 02:40:45,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:45,012 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2022-11-03 02:40:45,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 02:40:45,012 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.75) internal successors, (49), 25 states have internal predecessors, (49), 6 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 37 [2022-11-03 02:40:45,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:45,013 INFO L225 Difference]: With dead ends: 96 [2022-11-03 02:40:45,013 INFO L226 Difference]: Without dead ends: 96 [2022-11-03 02:40:45,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 101 SyntacticMatches, 12 SemanticMatches, 48 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 44.9s TimeCoverageRelationStatistics Valid=211, Invalid=1600, Unknown=23, NotChecked=616, Total=2450 [2022-11-03 02:40:45,014 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 77 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 495 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:45,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 586 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 627 Invalid, 0 Unknown, 495 Unchecked, 0.9s Time] [2022-11-03 02:40:45,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-03 02:40:45,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2022-11-03 02:40:45,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 75 states have internal predecessors, (84), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 02:40:45,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2022-11-03 02:40:45,018 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 37 [2022-11-03 02:40:45,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:45,018 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2022-11-03 02:40:45,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.75) internal successors, (49), 25 states have internal predecessors, (49), 6 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-03 02:40:45,019 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2022-11-03 02:40:45,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-03 02:40:45,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:45,020 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, 1, 1, 1, 1] [2022-11-03 02:40:45,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:45,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:45,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:45,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:40:45,637 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:40:45,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:45,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1617154908, now seen corresponding path program 1 times [2022-11-03 02:40:45,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:40:45,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1962529175] [2022-11-03 02:40:45,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:45,638 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:40:45,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:40:45,639 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:40:45,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-03 02:40:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:45,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 02:40:45,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:45,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:40:45,875 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:40:45,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:40:45,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:40:47,969 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_72| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_41| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_72| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_72|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_41|)))) is different from true [2022-11-03 02:40:50,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:40:50,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:40:52,241 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-03 02:40:52,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2022-11-03 02:40:52,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 50 [2022-11-03 02:40:52,542 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-03 02:40:52,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 45 [2022-11-03 02:40:52,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2022-11-03 02:40:52,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:52,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 02:40:52,802 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:40:52,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:40:52,857 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-03 02:40:52,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:59,296 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:40:59,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1962529175] [2022-11-03 02:40:59,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1962529175] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:40:59,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [382729813] [2022-11-03 02:40:59,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:59,296 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:40:59,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:40:59,299 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:40:59,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-03 02:40:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:59,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-03 02:40:59,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:59,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:40:59,908 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:40:59,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:40:59,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:41:00,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:41:02,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:41:02,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:41:02,875 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:41:02,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2022-11-03 02:41:02,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 53 [2022-11-03 02:41:03,461 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 02:41:03,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 45 [2022-11-03 02:41:03,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2022-11-03 02:41:05,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:05,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 02:41:05,595 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:41:05,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:41:05,610 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:05,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:12,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [382729813] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:41:12,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769954045] [2022-11-03 02:41:12,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:12,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:12,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:12,554 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:12,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-03 02:41:12,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:12,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-03 02:41:12,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:12,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:41:12,739 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:41:12,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:41:12,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:41:12,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:41:14,781 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_76| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_44| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_76| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_76|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_44|)))) is different from true [2022-11-03 02:41:14,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:41:14,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:41:14,910 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-03 02:41:14,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2022-11-03 02:41:14,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 50 [2022-11-03 02:41:15,059 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-03 02:41:15,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 45 [2022-11-03 02:41:15,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2022-11-03 02:41:15,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:15,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 02:41:15,242 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:41:15,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:41:15,247 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-03 02:41:15,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:21,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769954045] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:41:21,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:41:21,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 35 [2022-11-03 02:41:21,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860853524] [2022-11-03 02:41:21,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:41:21,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 02:41:21,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:21,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 02:41:21,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1148, Unknown=5, NotChecked=138, Total=1406 [2022-11-03 02:41:21,547 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand has 36 states, 32 states have (on average 1.59375) internal successors, (51), 26 states have internal predecessors, (51), 6 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-03 02:41:29,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:29,105 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2022-11-03 02:41:29,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:41:29,106 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 1.59375) internal successors, (51), 26 states have internal predecessors, (51), 6 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 37 [2022-11-03 02:41:29,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:29,107 INFO L225 Difference]: With dead ends: 90 [2022-11-03 02:41:29,107 INFO L226 Difference]: Without dead ends: 90 [2022-11-03 02:41:29,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 40.5s TimeCoverageRelationStatistics Valid=223, Invalid=1940, Unknown=7, NotChecked=182, Total=2352 [2022-11-03 02:41:29,109 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 70 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:29,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 561 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 446 Invalid, 0 Unknown, 380 Unchecked, 0.7s Time] [2022-11-03 02:41:29,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-03 02:41:29,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-11-03 02:41:29,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 75 states have internal predecessors, (82), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 02:41:29,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2022-11-03 02:41:29,113 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 37 [2022-11-03 02:41:29,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:29,114 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2022-11-03 02:41:29,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 1.59375) internal successors, (51), 26 states have internal predecessors, (51), 6 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-03 02:41:29,114 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2022-11-03 02:41:29,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:41:29,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:29,115 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] [2022-11-03 02:41:29,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:29,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-11-03 02:41:29,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:29,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:29,729 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:41:29,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:29,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1614444768, now seen corresponding path program 1 times [2022-11-03 02:41:29,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:29,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431829815] [2022-11-03 02:41:29,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:29,730 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:29,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:29,731 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:29,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-03 02:41:29,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:29,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 02:41:29,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:29,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 18 [2022-11-03 02:41:30,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 18 [2022-11-03 02:41:30,313 INFO L356 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2022-11-03 02:41:30,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2022-11-03 02:41:30,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-03 02:41:30,467 INFO L356 Elim1Store]: treesize reduction 32, result has 27.3 percent of original size [2022-11-03 02:41:30,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 39 [2022-11-03 02:41:30,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:41:30,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:30,851 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:41:30,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2022-11-03 02:41:30,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-11-03 02:41:31,147 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:31,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431829815] [2022-11-03 02:41:31,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431829815] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:41:31,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1942545522] [2022-11-03 02:41:31,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:31,148 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:31,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:31,149 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:31,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-11-03 02:41:31,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:31,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:41:31,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:31,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:41:31,549 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:41:31,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:41:31,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:41:31,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-03 02:41:35,924 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 02:41:35,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2022-11-03 02:41:35,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-03 02:41:36,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-03 02:41:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:36,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:36,144 WARN L833 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| |c_ULTIMATE.start_entry_point_~a10~0#1.base|))) (forall ((v_ArrVal_1089 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= |c_ULTIMATE.start_entry_point_~a10~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_1089) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))))) is different from false [2022-11-03 02:41:36,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1942545522] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:41:36,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872848817] [2022-11-03 02:41:36,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:36,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:36,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:36,165 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:36,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-03 02:41:36,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:36,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:41:36,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:36,811 INFO L356 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2022-11-03 02:41:36,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2022-11-03 02:41:36,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-03 02:41:36,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-03 02:41:37,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:41:37,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:37,487 INFO L356 Elim1Store]: treesize reduction 3, result has 80.0 percent of original size [2022-11-03 02:41:37,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 02:41:37,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-03 02:41:37,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-03 02:41:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:41:37,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872848817] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:37,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-03 02:41:37,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10, 10] total 36 [2022-11-03 02:41:37,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466804750] [2022-11-03 02:41:37,612 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-03 02:41:37,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 02:41:37,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:37,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 02:41:37,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1580, Unknown=2, NotChecked=82, Total=1892 [2022-11-03 02:41:37,614 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand has 37 states, 36 states have (on average 2.388888888888889) internal successors, (86), 33 states have internal predecessors, (86), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-03 02:41:46,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:46,071 INFO L93 Difference]: Finished difference Result 131 states and 135 transitions. [2022-11-03 02:41:46,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 02:41:46,072 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.388888888888889) internal successors, (86), 33 states have internal predecessors, (86), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 36 [2022-11-03 02:41:46,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:46,073 INFO L225 Difference]: With dead ends: 131 [2022-11-03 02:41:46,073 INFO L226 Difference]: Without dead ends: 131 [2022-11-03 02:41:46,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 124 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 4 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=559, Invalid=3601, Unknown=4, NotChecked=126, Total=4290 [2022-11-03 02:41:46,076 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 206 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:46,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 643 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 908 Invalid, 0 Unknown, 122 Unchecked, 1.3s Time] [2022-11-03 02:41:46,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-03 02:41:46,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 99. [2022-11-03 02:41:46,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 85 states have internal predecessors, (91), 5 states have call successors, (5), 5 states have call predecessors, (5), 8 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 02:41:46,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2022-11-03 02:41:46,080 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 36 [2022-11-03 02:41:46,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:46,081 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2022-11-03 02:41:46,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.388888888888889) internal successors, (86), 33 states have internal predecessors, (86), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-03 02:41:46,081 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2022-11-03 02:41:46,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-03 02:41:46,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:46,082 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] [2022-11-03 02:41:46,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (59)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:46,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:46,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:46,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:46,686 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:41:46,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:46,687 INFO L85 PathProgramCache]: Analyzing trace with hash -2127689086, now seen corresponding path program 1 times [2022-11-03 02:41:46,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:46,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548876206] [2022-11-03 02:41:46,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:46,687 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:46,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:46,688 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:46,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-03 02:41:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:46,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:41:46,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:46,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:41:46,949 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:41:46,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:41:46,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:41:49,050 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_85| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_52| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_85| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_85|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_52|)))) is different from true [2022-11-03 02:41:51,244 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-03 02:41:51,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2022-11-03 02:41:51,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-03 02:41:51,428 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-03 02:41:51,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 36 [2022-11-03 02:41:51,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2022-11-03 02:41:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-03 02:41:51,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:54,039 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_30| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_86| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~mem47#1.offset_BEFORE_CALL_18| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_53| (_ BitVec 32))) (let ((.cse4 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_30|)) (.cse5 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_30|))) (let ((.cse0 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_30| (store .cse5 |v_ULTIMATE.start_entry_point_#t~mem47#1.offset_BEFORE_CALL_18| (_ bv0 32)))) (.cse6 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_30| (store .cse4 |v_ULTIMATE.start_entry_point_#t~mem47#1.offset_BEFORE_CALL_18| (_ bv0 32))))) (let ((.cse1 (select (select .cse6 |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_53|)) (.cse2 (select (select .cse0 |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_53|))) (or (not (= (select (select .cse0 .cse1) .cse2) (_ bv0 32))) (= (let ((.cse3 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_30| (store .cse5 |v_ULTIMATE.start_entry_point_#t~mem47#1.offset_BEFORE_CALL_18| |c_ldv_malloc_#res.offset|)))) (select (select .cse3 (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_30| (store .cse4 |v_ULTIMATE.start_entry_point_#t~mem47#1.offset_BEFORE_CALL_18| |c_ldv_malloc_#res.base|)) |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_53|)) (select (select .cse3 |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_53|))) (_ bv0 32)) (not (= (select (select .cse6 .cse1) .cse2) (_ bv0 32)))))))) (forall ((|v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_30| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_86| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~mem47#1.offset_BEFORE_CALL_18| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_53| (_ BitVec 32))) (let ((.cse11 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_30|)) (.cse12 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_30|))) (let ((.cse7 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_30| (store .cse12 |v_ULTIMATE.start_entry_point_#t~mem47#1.offset_BEFORE_CALL_18| (_ bv0 32)))) (.cse13 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_30| (store .cse11 |v_ULTIMATE.start_entry_point_#t~mem47#1.offset_BEFORE_CALL_18| (_ bv0 32))))) (let ((.cse8 (select (select .cse13 |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_53|)) (.cse9 (select (select .cse7 |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_53|))) (or (not (= (select (select .cse7 .cse8) .cse9) (_ bv0 32))) (= (select (let ((.cse10 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_30| (store .cse11 |v_ULTIMATE.start_entry_point_#t~mem47#1.offset_BEFORE_CALL_18| |c_ldv_malloc_#res.base|)))) (select .cse10 (select (select .cse10 |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_53|))) (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_30| (store .cse12 |v_ULTIMATE.start_entry_point_#t~mem47#1.offset_BEFORE_CALL_18| |c_ldv_malloc_#res.offset|)) |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_53|)) (_ bv0 32)) (not (= (select (select .cse13 .cse8) .cse9) (_ bv0 32))))))))) is different from false [2022-11-03 02:41:54,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 112 [2022-11-03 02:41:54,239 INFO L356 Elim1Store]: treesize reduction 14, result has 54.8 percent of original size [2022-11-03 02:41:54,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 246 treesize of output 190 [2022-11-03 02:42:14,536 WARN L234 SmtUtils]: Spent 16.07s on a formula simplification. DAG size of input: 27 DAG size of output: 19 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:42:14,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:42:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 4 not checked. [2022-11-03 02:42:14,736 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:42:14,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548876206] [2022-11-03 02:42:14,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548876206] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:14,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1707808209] [2022-11-03 02:42:14,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:14,736 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:42:14,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:42:14,737 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:42:14,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-11-03 02:42:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:15,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 02:42:15,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:15,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:42:15,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:42:15,426 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:42:15,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:42:15,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:42:15,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:42:15,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-03 02:42:16,368 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:42:16,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 46 [2022-11-03 02:42:16,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2022-11-03 02:42:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:42:16,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:59,874 WARN L234 SmtUtils]: Spent 8.78s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:43:26,839 INFO L356 Elim1Store]: treesize reduction 109, result has 29.2 percent of original size [2022-11-03 02:43:26,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 797 treesize of output 769 [2022-11-03 02:43:27,187 INFO L356 Elim1Store]: treesize reduction 53, result has 36.1 percent of original size [2022-11-03 02:43:27,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 622 treesize of output 631 [2022-11-03 02:43:27,470 INFO L356 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-11-03 02:43:27,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 430 treesize of output 432 [2022-11-03 02:43:27,720 INFO L356 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-11-03 02:43:27,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 411 treesize of output 411 [2022-11-03 02:43:28,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-03 02:43:28,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-03 02:43:28,607 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:43:28,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 82 [2022-11-03 02:43:29,021 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:43:29,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 70 [2022-11-03 02:43:30,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:43:30,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-03 02:43:33,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:43:33,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-03 02:43:35,961 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 16 refuted. 2 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:43:35,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1707808209] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:35,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321710006] [2022-11-03 02:43:35,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:35,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:35,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:35,963 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:35,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-03 02:43:36,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:36,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:43:36,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:36,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:43:36,253 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:43:36,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:43:36,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:43:36,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:43:38,381 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_58| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_93| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_93| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_93|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_58|)))) is different from true [2022-11-03 02:43:38,670 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-03 02:43:38,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2022-11-03 02:43:38,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-03 02:43:38,827 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-03 02:43:38,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 36 [2022-11-03 02:43:38,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2022-11-03 02:43:38,873 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-03 02:43:38,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:21,714 WARN L234 SmtUtils]: Spent 8.40s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:44:22,937 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:44:22,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 420 treesize of output 364 [2022-11-03 02:44:23,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:44:23,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 493 treesize of output 429 [2022-11-03 02:44:23,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:44:23,865 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:44:23,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321710006] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:23,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:44:23,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 17, 18, 16, 15] total 56 [2022-11-03 02:44:23,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265274] [2022-11-03 02:44:23,866 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:44:23,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-03 02:44:23,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:23,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-03 02:44:23,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2500, Unknown=33, NotChecked=312, Total=3080 [2022-11-03 02:44:23,869 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand has 56 states, 52 states have (on average 1.8269230769230769) internal successors, (95), 46 states have internal predecessors, (95), 9 states have call successors, (12), 9 states have call predecessors, (12), 13 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2022-11-03 02:44:36,069 WARN L234 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 67 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:44:43,631 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_59| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~mem47#1.offset_BEFORE_CALL_22| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_94| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_34| (_ BitVec 32))) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_34|)) (.cse2 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_34|))) (let ((.cse6 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_34| (store .cse2 |v_ULTIMATE.start_entry_point_#t~mem47#1.offset_BEFORE_CALL_22| (_ bv0 32)))) (.cse3 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_34| (store .cse1 |v_ULTIMATE.start_entry_point_#t~mem47#1.offset_BEFORE_CALL_22| (_ bv0 32))))) (let ((.cse4 (select (select .cse3 |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_94|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_59|)) (.cse5 (select (select .cse6 |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_94|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_59|))) (or (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_34| (store .cse1 |v_ULTIMATE.start_entry_point_#t~mem47#1.offset_BEFORE_CALL_22| |c_ldv_malloc_#res.base|)))) (select .cse0 (select (select .cse0 |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_94|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_59|))) (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_34| (store .cse2 |v_ULTIMATE.start_entry_point_#t~mem47#1.offset_BEFORE_CALL_22| |c_ldv_malloc_#res.offset|)) |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_94|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_59|)) (_ bv0 32)) (not (= (select (select .cse3 .cse4) .cse5) (_ bv0 32))) (not (= (select (select .cse6 .cse4) .cse5) (_ bv0 32)))))))) (= |c_ldv_malloc_#in~size| c_ldv_malloc_~size) (forall ((|v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_30| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_86| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~mem47#1.offset_BEFORE_CALL_18| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_53| (_ BitVec 32))) (let ((.cse11 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_30|)) (.cse12 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_30|))) (let ((.cse7 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_30| (store .cse12 |v_ULTIMATE.start_entry_point_#t~mem47#1.offset_BEFORE_CALL_18| (_ bv0 32)))) (.cse13 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_30| (store .cse11 |v_ULTIMATE.start_entry_point_#t~mem47#1.offset_BEFORE_CALL_18| (_ bv0 32))))) (let ((.cse8 (select (select .cse13 |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_53|)) (.cse9 (select (select .cse7 |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_53|))) (or (not (= (select (select .cse7 .cse8) .cse9) (_ bv0 32))) (= (let ((.cse10 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_30| (store .cse12 |v_ULTIMATE.start_entry_point_#t~mem47#1.offset_BEFORE_CALL_18| |c_ldv_malloc_#res.offset|)))) (select (select .cse10 (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_30| (store .cse11 |v_ULTIMATE.start_entry_point_#t~mem47#1.offset_BEFORE_CALL_18| |c_ldv_malloc_#res.base|)) |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_53|)) (select (select .cse10 |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_53|))) (_ bv0 32)) (not (= (select (select .cse13 .cse8) .cse9) (_ bv0 32)))))))) (forall ((|v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_30| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_86| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~mem47#1.offset_BEFORE_CALL_18| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_53| (_ BitVec 32))) (let ((.cse18 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_30|)) (.cse19 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_30|))) (let ((.cse14 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_30| (store .cse19 |v_ULTIMATE.start_entry_point_#t~mem47#1.offset_BEFORE_CALL_18| (_ bv0 32)))) (.cse20 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_30| (store .cse18 |v_ULTIMATE.start_entry_point_#t~mem47#1.offset_BEFORE_CALL_18| (_ bv0 32))))) (let ((.cse15 (select (select .cse20 |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_53|)) (.cse16 (select (select .cse14 |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_53|))) (or (not (= (select (select .cse14 .cse15) .cse16) (_ bv0 32))) (= (select (let ((.cse17 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_30| (store .cse18 |v_ULTIMATE.start_entry_point_#t~mem47#1.offset_BEFORE_CALL_18| |c_ldv_malloc_#res.base|)))) (select .cse17 (select (select .cse17 |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_53|))) (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_30| (store .cse19 |v_ULTIMATE.start_entry_point_#t~mem47#1.offset_BEFORE_CALL_18| |c_ldv_malloc_#res.offset|)) |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_53|)) (_ bv0 32)) (not (= (select (select .cse20 .cse15) .cse16) (_ bv0 32)))))))) (= |c_#valid| |c_old(#valid)|) (forall ((|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_59| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~mem47#1.offset_BEFORE_CALL_22| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_94| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_34| (_ BitVec 32))) (let ((.cse26 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_34|)) (.cse27 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_34|))) (let ((.cse24 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_34| (store .cse27 |v_ULTIMATE.start_entry_point_#t~mem47#1.offset_BEFORE_CALL_22| (_ bv0 32)))) (.cse21 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_34| (store .cse26 |v_ULTIMATE.start_entry_point_#t~mem47#1.offset_BEFORE_CALL_22| (_ bv0 32))))) (let ((.cse22 (select (select .cse21 |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_94|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_59|)) (.cse23 (select (select .cse24 |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_94|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_59|))) (or (not (= (select (select .cse21 .cse22) .cse23) (_ bv0 32))) (not (= (select (select .cse24 .cse22) .cse23) (_ bv0 32))) (= (let ((.cse25 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_34| (store .cse27 |v_ULTIMATE.start_entry_point_#t~mem47#1.offset_BEFORE_CALL_22| |c_ldv_malloc_#res.offset|)))) (select (select .cse25 (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_#t~mem47#1.base_BEFORE_CALL_34| (store .cse26 |v_ULTIMATE.start_entry_point_#t~mem47#1.offset_BEFORE_CALL_22| |c_ldv_malloc_#res.base|)) |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_94|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_59|)) (select (select .cse25 |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_94|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_59|))) (_ bv0 32)))))))) is different from false [2022-11-03 02:45:25,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:25,459 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2022-11-03 02:45:25,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-03 02:45:25,460 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 52 states have (on average 1.8269230769230769) internal successors, (95), 46 states have internal predecessors, (95), 9 states have call successors, (12), 9 states have call predecessors, (12), 13 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) Word has length 37 [2022-11-03 02:45:25,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:25,461 INFO L225 Difference]: With dead ends: 89 [2022-11-03 02:45:25,461 INFO L226 Difference]: Without dead ends: 89 [2022-11-03 02:45:25,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 158 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 202.8s TimeCoverageRelationStatistics Valid=408, Invalid=3734, Unknown=34, NotChecked=516, Total=4692 [2022-11-03 02:45:25,463 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 80 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 420 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:25,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 735 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1015 Invalid, 0 Unknown, 420 Unchecked, 6.7s Time] [2022-11-03 02:45:25,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-03 02:45:25,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2022-11-03 02:45:25,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 75 states have internal predecessors, (77), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 02:45:25,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2022-11-03 02:45:25,467 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 37 [2022-11-03 02:45:25,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:25,468 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2022-11-03 02:45:25,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 52 states have (on average 1.8269230769230769) internal successors, (95), 46 states have internal predecessors, (95), 9 states have call successors, (12), 9 states have call predecessors, (12), 13 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2022-11-03 02:45:25,468 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2022-11-03 02:45:25,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 02:45:25,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:25,469 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] [2022-11-03 02:45:25,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:25,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (62)] Ended with exit code 0 [2022-11-03 02:45:25,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-11-03 02:45:26,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:26,085 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:45:26,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:26,086 INFO L85 PathProgramCache]: Analyzing trace with hash -998224317, now seen corresponding path program 1 times [2022-11-03 02:45:26,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:45:26,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234595115] [2022-11-03 02:45:26,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:26,086 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:45:26,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:45:26,087 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:45:26,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-03 02:45:26,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:26,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-03 02:45:26,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:27,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:45:27,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:45:28,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:45:28,447 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-11-03 02:45:28,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 41 treesize of output 36 [2022-11-03 02:45:31,416 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 02:45:31,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 43 [2022-11-03 02:45:32,959 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:45:32,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 42 [2022-11-03 02:45:45,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:45:45,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:47,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-11-03 02:46:36,435 WARN L234 SmtUtils]: Spent 26.76s on a formula simplification. DAG size of input: 51 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:46:36,437 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:46:36,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234595115] [2022-11-03 02:46:36,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234595115] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:46:36,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [68966887] [2022-11-03 02:46:36,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:36,437 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:46:36,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:46:36,446 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:46:36,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-11-03 02:46:36,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:36,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:46:36,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:38,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:46:39,264 INFO L356 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2022-11-03 02:46:39,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2022-11-03 02:46:50,140 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 02:46:50,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2022-11-03 02:46:50,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-11-03 02:47:03,901 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:47:03,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:04,055 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1247 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_old_#valid#1| (store (store |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_1247) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) (_ bv0 1)) |c_ULTIMATE.start_entry_point_~a10~0#1.base| (_ bv0 1)))) is different from false [2022-11-03 02:47:04,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [68966887] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:04,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215349854] [2022-11-03 02:47:04,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:04,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:04,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:04,128 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:04,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-11-03 02:47:04,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:04,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:47:04,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:05,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:47:06,549 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-03 02:47:06,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2022-11-03 02:47:15,334 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 02:47:15,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2022-11-03 02:47:16,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2022-11-03 02:47:30,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:47:30,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:30,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215349854] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:30,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:47:30,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 16] total 41 [2022-11-03 02:47:30,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81983733] [2022-11-03 02:47:30,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:47:30,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-03 02:47:30,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:47:30,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-03 02:47:30,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2696, Unknown=36, NotChecked=106, Total=3080 [2022-11-03 02:47:30,892 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 42 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 35 states have internal predecessors, (80), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-03 02:47:55,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:55,038 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2022-11-03 02:47:55,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 02:47:55,039 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 35 states have internal predecessors, (80), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 38 [2022-11-03 02:47:55,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:55,039 INFO L225 Difference]: With dead ends: 88 [2022-11-03 02:47:55,039 INFO L226 Difference]: Without dead ends: 72 [2022-11-03 02:47:55,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 113 SyntacticMatches, 8 SemanticMatches, 68 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1755 ImplicationChecksByTransitivity, 140.2s TimeCoverageRelationStatistics Valid=384, Invalid=4274, Unknown=38, NotChecked=134, Total=4830 [2022-11-03 02:47:55,041 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 18 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 470 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:55,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 568 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 152 Invalid, 0 Unknown, 470 Unchecked, 0.8s Time] [2022-11-03 02:47:55,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-03 02:47:55,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-11-03 02:47:55,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 50 states have (on average 1.26) internal successors, (63), 62 states have internal predecessors, (63), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-03 02:47:55,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2022-11-03 02:47:55,045 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 38 [2022-11-03 02:47:55,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:55,046 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2022-11-03 02:47:55,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 35 states have internal predecessors, (80), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-03 02:47:55,046 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2022-11-03 02:47:55,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 02:47:55,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:55,047 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:55,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:55,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:55,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (65)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:55,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:47:55,662 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:47:55,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:55,663 INFO L85 PathProgramCache]: Analyzing trace with hash -13706918, now seen corresponding path program 1 times [2022-11-03 02:47:55,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:47:55,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635026477] [2022-11-03 02:47:55,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:55,663 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:47:55,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:47:55,664 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:47:55,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-03 02:47:55,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:55,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:47:55,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:55,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:47:56,262 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:47:56,262 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-03 02:47:56,527 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:47:56,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-03 02:47:58,826 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:47:58,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-03 02:47:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 4 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:47:58,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:02,327 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:48:02,327 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:02,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635026477] [2022-11-03 02:48:02,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635026477] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:48:02,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:48:02,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-03 02:48:02,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752122762] [2022-11-03 02:48:02,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:48:02,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:48:02,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:48:02,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:48:02,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=53, Unknown=1, NotChecked=0, Total=72 [2022-11-03 02:48:02,329 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:48:02,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:02,522 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2022-11-03 02:48:02,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:48:02,523 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-11-03 02:48:02,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:02,524 INFO L225 Difference]: With dead ends: 71 [2022-11-03 02:48:02,524 INFO L226 Difference]: Without dead ends: 71 [2022-11-03 02:48:02,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 64 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=18, Invalid=53, Unknown=1, NotChecked=0, Total=72 [2022-11-03 02:48:02,525 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 16 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:02,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 73 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2022-11-03 02:48:02,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-03 02:48:02,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-11-03 02:48:02,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.24) internal successors, (62), 61 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-03 02:48:02,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2022-11-03 02:48:02,529 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 40 [2022-11-03 02:48:02,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:02,529 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2022-11-03 02:48:02,530 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:48:02,530 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2022-11-03 02:48:02,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 02:48:02,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:02,531 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:02,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:02,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:48:02,744 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:48:02,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:02,744 INFO L85 PathProgramCache]: Analyzing trace with hash -13706917, now seen corresponding path program 1 times [2022-11-03 02:48:02,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:48:02,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [435012770] [2022-11-03 02:48:02,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:02,745 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:48:02,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:48:02,746 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:48:02,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-03 02:48:02,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:02,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:48:02,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:03,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:03,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 02:48:03,714 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:48:03,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:48:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:48:03,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:08,625 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:08,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [435012770] [2022-11-03 02:48:08,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [435012770] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:48:08,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1122244708] [2022-11-03 02:48:08,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:08,626 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:08,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:48:08,627 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:48:08,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (69)] Waiting until timeout for monitored process [2022-11-03 02:48:08,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:08,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-03 02:48:08,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:09,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:48:09,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:48:09,832 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:48:09,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:48:09,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 02:48:10,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:48:10,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-11-03 02:48:10,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:10,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 02:48:10,624 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:48:10,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:48:13,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:13,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-03 02:48:13,495 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:48:13,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:48:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:48:13,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:14,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1122244708] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:48:14,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610028731] [2022-11-03 02:48:14,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:14,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:14,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:14,430 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:48:14,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-11-03 02:48:14,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:14,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:48:14,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:15,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:15,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 02:48:15,286 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:48:15,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:48:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:48:15,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:17,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610028731] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:48:17,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:48:17,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 8] total 18 [2022-11-03 02:48:17,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70702530] [2022-11-03 02:48:17,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:48:17,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 02:48:17,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:48:17,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 02:48:17,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=357, Unknown=1, NotChecked=0, Total=420 [2022-11-03 02:48:17,995 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 02:48:22,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:22,686 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2022-11-03 02:48:22,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:48:22,687 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) Word has length 40 [2022-11-03 02:48:22,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:22,688 INFO L225 Difference]: With dead ends: 70 [2022-11-03 02:48:22,689 INFO L226 Difference]: Without dead ends: 70 [2022-11-03 02:48:22,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 109 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=118, Invalid=636, Unknown=2, NotChecked=0, Total=756 [2022-11-03 02:48:22,690 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 94 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:22,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 247 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 348 Invalid, 0 Unknown, 39 Unchecked, 1.8s Time] [2022-11-03 02:48:22,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-03 02:48:22,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2022-11-03 02:48:22,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 55 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 02:48:22,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2022-11-03 02:48:22,694 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 40 [2022-11-03 02:48:22,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:22,695 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2022-11-03 02:48:22,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 02:48:22,695 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2022-11-03 02:48:22,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 02:48:22,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:22,696 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:22,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-11-03 02:48:22,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:23,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (69)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:23,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:23,305 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:48:23,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:23,306 INFO L85 PathProgramCache]: Analyzing trace with hash -424914424, now seen corresponding path program 1 times [2022-11-03 02:48:23,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:48:23,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576302290] [2022-11-03 02:48:23,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:23,306 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:48:23,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:48:23,307 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:48:23,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-03 02:48:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:23,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 02:48:23,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:23,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:48:23,821 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:48:23,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:48:23,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:48:24,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-03 02:48:30,727 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:48:30,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-03 02:48:31,074 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-03 02:48:31,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 39 [2022-11-03 02:48:31,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2022-11-03 02:48:31,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-11-03 02:48:32,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:48:40,938 INFO L356 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-03 02:48:40,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-11-03 02:48:41,295 INFO L356 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-03 02:48:41,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 51 [2022-11-03 02:48:41,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:48:41,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-03 02:48:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:41,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:42,125 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1443 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1443) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))))) is different from false [2022-11-03 02:48:42,245 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ldv_malloc_#res.base_389| (_ BitVec 32)) (v_ArrVal_1443 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select (store |c_#valid| |v_ldv_malloc_#res.base_389| (_ bv1 1)) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1443) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (_ bv1 1)))) is different from false [2022-11-03 02:48:42,250 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:42,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576302290] [2022-11-03 02:48:42,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576302290] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:48:42,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1146758470] [2022-11-03 02:48:42,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:42,251 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:42,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:48:42,252 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:48:42,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2022-11-03 02:48:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:42,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 02:48:42,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:42,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:48:43,554 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:48:43,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:48:43,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:48:43,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:48:44,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-03 02:48:51,304 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:48:51,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:48:51,820 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:48:51,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 39 [2022-11-03 02:48:51,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2022-11-03 02:48:52,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-03 02:48:53,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-03 02:49:10,888 INFO L356 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-11-03 02:49:10,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 35 [2022-11-03 02:49:11,332 INFO L356 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-03 02:49:11,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 45 [2022-11-03 02:49:11,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:49:11,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-03 02:49:11,751 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:49:11,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:11,818 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1480 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1480) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (_ bv1 1)))) is different from false [2022-11-03 02:49:11,988 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1480 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1483 (_ BitVec 1)) (|v_ldv_malloc_#res.base_392| (_ BitVec 32))) (or (= (bvadd (select (store |c_#valid| |v_ldv_malloc_#res.base_392| v_ArrVal_1483) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1480) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (_ bv1 1)) (_ bv0 1)) (not (= (_ bv0 1) (select |c_#valid| |v_ldv_malloc_#res.base_392|))))) is different from false [2022-11-03 02:49:11,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1146758470] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:49:11,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193253903] [2022-11-03 02:49:11,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:11,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:11,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:11,995 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:49:11,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-11-03 02:49:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:12,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:49:12,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:12,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-03 02:49:20,963 INFO L356 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-11-03 02:49:20,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 35 [2022-11-03 02:49:21,469 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-03 02:49:21,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 34 [2022-11-03 02:49:22,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-03 02:49:22,263 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:49:22,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:22,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193253903] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:22,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:49:22,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [20, 20] total 43 [2022-11-03 02:49:22,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604371901] [2022-11-03 02:49:22,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:22,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:49:22,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:22,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:49:22,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1725, Unknown=20, NotChecked=348, Total=2256 [2022-11-03 02:49:22,265 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:49:23,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:23,084 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2022-11-03 02:49:23,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:49:23,085 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2022-11-03 02:49:23,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:23,085 INFO L225 Difference]: With dead ends: 71 [2022-11-03 02:49:23,086 INFO L226 Difference]: Without dead ends: 71 [2022-11-03 02:49:23,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 54.0s TimeCoverageRelationStatistics Valid=167, Invalid=1809, Unknown=20, NotChecked=356, Total=2352 [2022-11-03 02:49:23,087 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 5 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:23,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 162 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 123 Invalid, 0 Unknown, 39 Unchecked, 0.7s Time] [2022-11-03 02:49:23,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-03 02:49:23,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-11-03 02:49:23,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 61 states have internal predecessors, (63), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-03 02:49:23,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2022-11-03 02:49:23,091 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 41 [2022-11-03 02:49:23,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:23,091 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2022-11-03 02:49:23,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:49:23,092 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2022-11-03 02:49:23,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 02:49:23,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:23,093 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:23,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (72)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:23,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:23,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:23,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:49:23,699 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:49:23,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:23,700 INFO L85 PathProgramCache]: Analyzing trace with hash -424914423, now seen corresponding path program 1 times [2022-11-03 02:49:23,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:23,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2075697713] [2022-11-03 02:49:23,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:23,700 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:23,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:23,701 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:23,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-03 02:49:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:23,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 02:49:23,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:23,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:49:24,272 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:49:24,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:49:24,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:49:24,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:49:24,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-03 02:49:25,268 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:49:25,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:49:25,605 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-03 02:49:25,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 39 [2022-11-03 02:49:25,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2022-11-03 02:49:27,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2022-11-03 02:49:27,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-03 02:49:32,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:32,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-03 02:49:32,283 INFO L356 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2022-11-03 02:49:32,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 17 [2022-11-03 02:49:32,798 INFO L356 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-03 02:49:32,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 75 [2022-11-03 02:49:32,868 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 02:49:32,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 65 [2022-11-03 02:49:32,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2022-11-03 02:49:33,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-03 02:49:33,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-11-03 02:49:33,425 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:49:33,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:34,114 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1548 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1548) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_1548 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1549 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1548) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1549) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))))) is different from false [2022-11-03 02:49:34,387 WARN L833 $PredicateComparison]: unable to prove that (and (or (forall ((|v_ldv_malloc_#res.base_395| (_ BitVec 32))) (not (= (select |c_#valid| |v_ldv_malloc_#res.base_395|) (_ bv0 1)))) (forall ((v_ArrVal_1548 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1548) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0))))) (forall ((|v_ldv_malloc_#res.base_395| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_ldv_malloc_#res.base_395|) (_ bv0 1))) (forall ((v_ArrVal_1548 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1549 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1552 (_ BitVec 32))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1548) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (select (store |c_#length| |v_ldv_malloc_#res.base_395| v_ArrVal_1552) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1549) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))))))) is different from false [2022-11-03 02:49:34,398 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:34,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2075697713] [2022-11-03 02:49:34,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2075697713] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:49:34,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [445245819] [2022-11-03 02:49:34,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:34,399 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:49:34,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:49:34,400 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:49:34,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2022-11-03 02:49:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:34,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-03 02:49:34,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:34,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:49:35,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:49:38,264 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:49:38,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-03 02:49:38,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:49:38,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:49:39,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-03 02:49:39,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:49:46,594 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 02:49:46,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2022-11-03 02:49:46,739 INFO L356 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-11-03 02:49:46,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 26 [2022-11-03 02:49:47,354 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:49:47,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 48 [2022-11-03 02:49:47,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 52 [2022-11-03 02:49:50,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-03 02:49:50,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-03 02:49:59,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:59,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-03 02:49:59,634 INFO L356 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2022-11-03 02:49:59,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-03 02:50:00,352 INFO L356 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-11-03 02:50:00,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 71 [2022-11-03 02:50:00,429 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 02:50:00,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 61 [2022-11-03 02:50:01,187 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:50:01,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 24 [2022-11-03 02:50:01,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:50:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:01,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:50:01,683 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1591 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1592 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1591) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) (_ bv4 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1592) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))) (forall ((v_ArrVal_1591 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1591) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse0 (bvadd .cse0 (_ bv4 32)))))) is different from false [2022-11-03 02:50:01,942 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|v_ldv_malloc_#res.base_398| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ldv_malloc_#res.base_398|))) (forall ((v_ArrVal_1591 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1592 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1595 (_ BitVec 32))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1591) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) (_ bv4 32)) (select (store |c_#length| |v_ldv_malloc_#res.base_398| v_ArrVal_1595) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1592) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))))) (or (forall ((v_ArrVal_1591 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1591) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse0 (bvadd .cse0 (_ bv4 32))))) (forall ((|v_ldv_malloc_#res.base_398| (_ BitVec 32))) (not (= (_ bv0 1) (select |c_#valid| |v_ldv_malloc_#res.base_398|)))))) is different from false [2022-11-03 02:50:01,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [445245819] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:50:01,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78557688] [2022-11-03 02:50:01,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:01,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:01,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:50:01,960 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:50:01,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-11-03 02:50:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:02,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-03 02:50:02,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:02,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:50:02,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:50:02,415 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:50:02,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-03 02:50:02,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:50:02,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:50:03,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:50:03,966 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-03 02:50:15,090 INFO L356 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-11-03 02:50:15,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 26 [2022-11-03 02:50:15,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-03 02:50:15,903 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-03 02:50:15,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 48 [2022-11-03 02:50:15,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 52 [2022-11-03 02:50:18,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-03 02:50:18,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-03 02:50:35,897 INFO L356 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2022-11-03 02:50:35,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 17 [2022-11-03 02:50:35,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-03 02:50:36,738 INFO L356 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-11-03 02:50:36,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 77 [2022-11-03 02:50:36,826 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 02:50:36,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 61 [2022-11-03 02:50:37,424 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-03 02:50:37,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 24 [2022-11-03 02:50:37,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:50:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:37,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:50:37,626 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1634 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1634) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_1634 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1635 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1634) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1635) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))))) is different from false [2022-11-03 02:50:37,918 WARN L833 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_1634 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1634) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((|v_ldv_malloc_#res.base_401| (_ BitVec 32))) (not (= (select |c_#valid| |v_ldv_malloc_#res.base_401|) (_ bv0 1))))) (forall ((|v_ldv_malloc_#res.base_401| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_ldv_malloc_#res.base_401|) (_ bv0 1))) (forall ((v_ArrVal_1638 (_ BitVec 32)) (v_ArrVal_1634 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1635 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1634) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (select (store |c_#length| |v_ldv_malloc_#res.base_401| v_ArrVal_1638) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1635) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))))))) is different from false [2022-11-03 02:50:37,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78557688] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:50:37,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:50:37,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 57 [2022-11-03 02:50:37,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370837723] [2022-11-03 02:50:37,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:50:37,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-03 02:50:37,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:50:37,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-03 02:50:37,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=3230, Unknown=26, NotChecked=726, Total=4290 [2022-11-03 02:50:37,935 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 58 states, 51 states have (on average 1.6666666666666667) internal successors, (85), 47 states have internal predecessors, (85), 9 states have call successors, (9), 8 states have call predecessors, (9), 10 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) [2022-11-03 02:51:06,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:06,399 INFO L93 Difference]: Finished difference Result 92 states and 91 transitions. [2022-11-03 02:51:06,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-03 02:51:06,399 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 51 states have (on average 1.6666666666666667) internal successors, (85), 47 states have internal predecessors, (85), 9 states have call successors, (9), 8 states have call predecessors, (9), 10 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) Word has length 41 [2022-11-03 02:51:06,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:06,400 INFO L225 Difference]: With dead ends: 92 [2022-11-03 02:51:06,400 INFO L226 Difference]: Without dead ends: 92 [2022-11-03 02:51:06,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 88.3s TimeCoverageRelationStatistics Valid=484, Invalid=4618, Unknown=34, NotChecked=870, Total=6006 [2022-11-03 02:51:06,402 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 135 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:06,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 824 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 840 Invalid, 0 Unknown, 160 Unchecked, 4.7s Time] [2022-11-03 02:51:06,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-03 02:51:06,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2022-11-03 02:51:06,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 61 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-03 02:51:06,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2022-11-03 02:51:06,405 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 41 [2022-11-03 02:51:06,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:06,406 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2022-11-03 02:51:06,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 51 states have (on average 1.6666666666666667) internal successors, (85), 47 states have internal predecessors, (85), 9 states have call successors, (9), 8 states have call predecessors, (9), 10 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) [2022-11-03 02:51:06,406 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2022-11-03 02:51:06,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 02:51:06,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:06,407 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] [2022-11-03 02:51:06,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-11-03 02:51:06,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (75)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:06,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:07,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:51:07,008 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-03 02:51:07,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:07,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1317895911, now seen corresponding path program 1 times [2022-11-03 02:51:07,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:07,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061650845] [2022-11-03 02:51:07,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:07,009 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:07,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:07,010 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:07,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-03 02:51:07,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:07,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-03 02:51:07,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:07,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:51:07,527 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:51:07,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:51:07,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:51:07,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-03 02:51:16,282 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:51:16,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:51:16,609 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-03 02:51:16,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 39 [2022-11-03 02:51:16,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2022-11-03 02:51:17,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-11-03 02:51:17,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-03 02:51:24,164 INFO L356 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-03 02:51:24,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 51 [2022-11-03 02:51:24,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:51:24,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-03 02:51:24,539 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:24,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:24,732 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1669 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1669) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))))) is different from false [2022-11-03 02:51:24,796 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:24,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061650845] [2022-11-03 02:51:24,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061650845] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:51:24,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1084464809] [2022-11-03 02:51:24,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:24,796 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:51:24,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:51:24,797 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:51:24,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (78)] Waiting until timeout for monitored process [2022-11-03 02:51:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:25,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-03 02:51:25,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:25,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:51:28,015 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:51:28,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:51:28,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:51:28,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:51:28,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-03 02:51:31,612 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:51:31,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:51:32,051 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:51:32,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2022-11-03 02:51:32,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2022-11-03 02:51:33,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-03 02:51:34,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-03 02:51:44,773 INFO L356 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-03 02:51:44,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 45 [2022-11-03 02:51:44,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:51:45,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-03 02:51:45,127 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:45,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:45,191 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1702 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1702) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (_ bv1 1)))) is different from false [2022-11-03 02:51:45,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1084464809] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:51:45,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288312483] [2022-11-03 02:51:45,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:45,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:45,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:45,258 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:45,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d214214-c095-43f3-8ab6-2e42c59da204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-11-03 02:51:45,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:45,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-03 02:51:45,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:45,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:51:49,984 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:51:49,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-03 02:51:50,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:51:50,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:51:50,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-03 02:51:52,744 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:51:52,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:51:52,846 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-03 02:51:52,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 39 [2022-11-03 02:51:52,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2022-11-03 02:51:53,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-11-03 02:51:53,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-03 02:51:57,716 INFO L356 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-03 02:51:57,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 51 [2022-11-03 02:51:57,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:51:57,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-03 02:51:57,811 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:57,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:57,873 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1736 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1736) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (_ bv1 1)))) is different from false [2022-11-03 02:51:57,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288312483] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:51:57,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:51:57,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 19] total 39 [2022-11-03 02:51:57,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795403270] [2022-11-03 02:51:57,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:51:57,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:51:57,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:57,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:51:57,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1488, Unknown=15, NotChecked=240, Total=1892 [2022-11-03 02:51:57,938 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 40 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 33 states have internal predecessors, (64), 7 states have call successors, (7), 6 states have call predecessors, (7), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9)