./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 2329fc70 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_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test10-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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-2329fc7 [2022-12-14 12:57:46,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:57:46,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:57:46,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:57:46,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:57:46,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:57:46,686 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:57:46,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:57:46,688 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:57:46,688 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:57:46,689 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:57:46,690 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:57:46,690 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:57:46,691 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:57:46,692 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:57:46,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:57:46,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:57:46,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:57:46,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:57:46,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:57:46,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:57:46,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:57:46,699 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:57:46,700 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:57:46,702 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:57:46,702 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:57:46,702 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:57:46,703 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:57:46,703 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:57:46,704 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:57:46,704 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:57:46,705 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:57:46,705 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:57:46,706 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:57:46,707 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:57:46,707 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:57:46,707 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:57:46,707 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:57:46,708 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:57:46,708 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:57:46,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:57:46,709 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 12:57:46,724 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:57:46,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:57:46,725 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:57:46,725 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:57:46,725 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:57:46,725 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:57:46,726 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:57:46,726 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:57:46,726 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:57:46,726 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:57:46,726 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:57:46,726 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:57:46,726 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:57:46,726 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:57:46,726 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:57:46,726 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:57:46,727 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:57:46,727 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:57:46,727 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 12:57:46,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 12:57:46,727 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:57:46,727 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:57:46,728 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 12:57:46,728 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:57:46,728 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:57:46,728 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:57:46,728 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 12:57:46,728 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 12:57:46,728 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 12:57:46,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:57:46,728 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 12:57:46,728 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:57:46,728 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:57:46,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:57:46,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:57:46,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:57:46,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:57:46,729 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:57:46,729 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:57:46,729 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:57:46,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:57:46,729 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:57:46,729 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_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 207ea7efa81a205528159a2c1c5225b996f0eb4901bda418907cbc964f19b86c [2022-12-14 12:57:46,919 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:57:46,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:57:46,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:57:46,941 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:57:46,942 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:57:46,943 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/ldv-memsafety/memleaks_test10-1.i [2022-12-14 12:57:49,458 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:57:49,635 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:57:49,635 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/sv-benchmarks/c/ldv-memsafety/memleaks_test10-1.i [2022-12-14 12:57:49,645 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/data/da7316592/319066096b614e34938c93994f72fed5/FLAG64dc98cd2 [2022-12-14 12:57:50,022 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/data/da7316592/319066096b614e34938c93994f72fed5 [2022-12-14 12:57:50,027 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:57:50,029 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:57:50,031 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:57:50,031 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:57:50,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:57:50,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:57:50" (1/1) ... [2022-12-14 12:57:50,040 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dccfc05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:50, skipping insertion in model container [2022-12-14 12:57:50,040 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:57:50" (1/1) ... [2022-12-14 12:57:50,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:57:50,075 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:57:50,306 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:57:50,320 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-12-14 12:57:50,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@373befb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:50, skipping insertion in model container [2022-12-14 12:57:50,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:57:50,321 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 12:57:50,323 INFO L158 Benchmark]: Toolchain (without parser) took 293.46ms. Allocated memory is still 109.1MB. Free memory was 54.9MB in the beginning and 77.6MB in the end (delta: -22.7MB). Peak memory consumption was 13.6MB. Max. memory is 16.1GB. [2022-12-14 12:57:50,323 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 109.1MB. Free memory is still 61.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 12:57:50,323 INFO L158 Benchmark]: CACSL2BoogieTranslator took 290.03ms. Allocated memory is still 109.1MB. Free memory was 54.7MB in the beginning and 77.6MB in the end (delta: -22.9MB). Peak memory consumption was 13.6MB. Max. memory is 16.1GB. [2022-12-14 12:57:50,324 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 109.1MB. Free memory is still 61.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 290.03ms. Allocated memory is still 109.1MB. Free memory was 54.7MB in the beginning and 77.6MB in the end (delta: -22.9MB). Peak memory consumption was 13.6MB. 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_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test10-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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-2329fc7 [2022-12-14 12:57:51,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:57:51,617 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:57:51,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:57:51,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:57:51,633 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:57:51,634 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:57:51,635 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:57:51,636 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:57:51,636 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:57:51,637 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:57:51,638 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:57:51,638 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:57:51,639 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:57:51,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:57:51,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:57:51,641 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:57:51,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:57:51,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:57:51,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:57:51,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:57:51,645 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:57:51,646 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:57:51,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:57:51,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:57:51,649 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:57:51,649 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:57:51,650 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:57:51,650 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:57:51,651 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:57:51,651 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:57:51,651 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:57:51,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:57:51,652 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:57:51,653 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:57:51,659 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:57:51,660 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:57:51,660 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:57:51,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:57:51,662 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:57:51,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:57:51,663 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 12:57:51,679 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:57:51,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:57:51,680 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:57:51,680 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:57:51,680 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:57:51,680 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:57:51,681 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:57:51,681 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:57:51,681 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:57:51,681 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:57:51,681 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:57:51,681 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:57:51,682 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 12:57:51,682 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 12:57:51,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:57:51,682 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:57:51,682 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 12:57:51,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:57:51,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:57:51,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:57:51,683 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 12:57:51,683 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 12:57:51,683 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 12:57:51,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:57:51,683 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 12:57:51,683 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 12:57:51,683 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 12:57:51,683 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:57:51,684 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:57:51,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:57:51,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 12:57:51,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:57:51,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:57:51,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:57:51,684 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:57:51,684 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 12:57:51,685 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 12:57:51,685 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:57:51,685 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 12:57:51,685 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_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 207ea7efa81a205528159a2c1c5225b996f0eb4901bda418907cbc964f19b86c [2022-12-14 12:57:51,908 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:57:51,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:57:51,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:57:51,928 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:57:51,928 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:57:51,929 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/ldv-memsafety/memleaks_test10-1.i [2022-12-14 12:57:54,530 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:57:54,744 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:57:54,744 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/sv-benchmarks/c/ldv-memsafety/memleaks_test10-1.i [2022-12-14 12:57:54,755 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/data/972ebf7ef/d22fe6bbcca64b09b001183240178083/FLAG39a4b3d97 [2022-12-14 12:57:54,767 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/data/972ebf7ef/d22fe6bbcca64b09b001183240178083 [2022-12-14 12:57:54,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:57:54,770 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:57:54,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:57:54,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:57:54,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:57:54,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:57:54" (1/1) ... [2022-12-14 12:57:54,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4726de83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:54, skipping insertion in model container [2022-12-14 12:57:54,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:57:54" (1/1) ... [2022-12-14 12:57:54,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:57:54,813 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:57:55,156 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:57:55,176 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 12:57:55,185 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:57:55,225 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:57:55,232 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:57:55,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:57:55,318 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:57:55,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:55 WrapperNode [2022-12-14 12:57:55,318 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:57:55,319 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:57:55,319 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:57:55,319 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:57:55,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:55" (1/1) ... [2022-12-14 12:57:55,344 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:55" (1/1) ... [2022-12-14 12:57:55,362 INFO L138 Inliner]: procedures = 167, calls = 91, calls flagged for inlining = 22, calls inlined = 4, statements flattened = 66 [2022-12-14 12:57:55,362 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:57:55,363 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:57:55,363 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:57:55,363 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:57:55,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:55" (1/1) ... [2022-12-14 12:57:55,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:55" (1/1) ... [2022-12-14 12:57:55,375 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:55" (1/1) ... [2022-12-14 12:57:55,375 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:55" (1/1) ... [2022-12-14 12:57:55,382 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:55" (1/1) ... [2022-12-14 12:57:55,383 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:55" (1/1) ... [2022-12-14 12:57:55,385 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:55" (1/1) ... [2022-12-14 12:57:55,386 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:55" (1/1) ... [2022-12-14 12:57:55,389 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:57:55,390 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:57:55,390 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:57:55,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:57:55,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:55" (1/1) ... [2022-12-14 12:57:55,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:57:55,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:57:55,417 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:57:55,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:57:55,453 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-12-14 12:57:55,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-12-14 12:57:55,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 12:57:55,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:57:55,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 12:57:55,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 12:57:55,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 12:57:55,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 12:57:55,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:57:55,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:57:55,553 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:57:55,555 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:57:55,826 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:57:55,833 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:57:55,833 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 12:57:55,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:57:55 BoogieIcfgContainer [2022-12-14 12:57:55,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:57:55,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:57:55,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:57:55,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:57:55,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:57:54" (1/3) ... [2022-12-14 12:57:55,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19c39fb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:57:55, skipping insertion in model container [2022-12-14 12:57:55,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:55" (2/3) ... [2022-12-14 12:57:55,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19c39fb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:57:55, skipping insertion in model container [2022-12-14 12:57:55,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:57:55" (3/3) ... [2022-12-14 12:57:55,844 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test10-1.i [2022-12-14 12:57:55,863 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:57:55,863 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2022-12-14 12:57:55,906 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:57:55,912 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;@1fed1089, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:57:55,912 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2022-12-14 12:57:55,916 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) [2022-12-14 12:57:55,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 12:57:55,923 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:57:55,923 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:57:55,924 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)] === [2022-12-14 12:57:55,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:57:55,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1838783457, now seen corresponding path program 1 times [2022-12-14 12:57:55,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:57:55,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1918884259] [2022-12-14 12:57:55,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:57:55,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:57:55,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:57:55,938 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:57:55,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 12:57:56,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:57:56,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 12:57:56,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:57:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:57:56,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:57:56,118 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:57:56,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1918884259] [2022-12-14 12:57:56,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1918884259] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:57:56,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:57:56,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 12:57:56,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089656235] [2022-12-14 12:57:56,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:57:56,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:57:56,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:57:56,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:57:56,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:57:56,151 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) [2022-12-14 12:57:56,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:57:56,363 INFO L93 Difference]: Finished difference Result 148 states and 165 transitions. [2022-12-14 12:57:56,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:57:56,365 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-12-14 12:57:56,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:57:56,372 INFO L225 Difference]: With dead ends: 148 [2022-12-14 12:57:56,372 INFO L226 Difference]: Without dead ends: 144 [2022-12-14 12:57:56,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:57:56,377 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 67 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-12-14 12:57:56,378 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] [2022-12-14 12:57:56,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-12-14 12:57:56,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 79. [2022-12-14 12:57:56,411 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) [2022-12-14 12:57:56,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2022-12-14 12:57:56,414 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 11 [2022-12-14 12:57:56,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:57:56,414 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2022-12-14 12:57:56,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 12:57:56,415 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2022-12-14 12:57:56,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 12:57:56,416 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:57:56,416 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:57:56,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:57:56,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:57:56,618 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)] === [2022-12-14 12:57:56,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:57:56,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1568680158, now seen corresponding path program 1 times [2022-12-14 12:57:56,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:57:56,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1925110625] [2022-12-14 12:57:56,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:57:56,623 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:57:56,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:57:56,627 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:57:56,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 12:57:56,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:57:56,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 12:57:56,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:57:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:57:56,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:57:56,732 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:57:56,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1925110625] [2022-12-14 12:57:56,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1925110625] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:57:56,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:57:56,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:57:56,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067943913] [2022-12-14 12:57:56,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:57:56,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:57:56,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:57:56,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:57:56,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:57:56,734 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) [2022-12-14 12:57:56,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:57:56,913 INFO L93 Difference]: Finished difference Result 144 states and 160 transitions. [2022-12-14 12:57:56,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:57:56,913 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 [2022-12-14 12:57:56,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:57:56,914 INFO L225 Difference]: With dead ends: 144 [2022-12-14 12:57:56,914 INFO L226 Difference]: Without dead ends: 142 [2022-12-14 12:57:56,915 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 [2022-12-14 12:57:56,915 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 60 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:57:56,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 247 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:57:56,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-12-14 12:57:56,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 75. [2022-12-14 12:57:56,920 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) [2022-12-14 12:57:56,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2022-12-14 12:57:56,921 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 11 [2022-12-14 12:57:56,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:57:56,921 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2022-12-14 12:57:56,922 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) [2022-12-14 12:57:56,922 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2022-12-14 12:57:56,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 12:57:56,922 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:57:56,922 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:57:56,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 12:57:57,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:57:57,124 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)] === [2022-12-14 12:57:57,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:57:57,125 INFO L85 PathProgramCache]: Analyzing trace with hash -27781040, now seen corresponding path program 1 times [2022-12-14 12:57:57,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:57:57,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2101757877] [2022-12-14 12:57:57,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:57:57,127 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:57:57,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:57:57,130 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:57:57,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 12:57:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:57:57,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:57:57,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:57:57,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:57:57,320 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)) |c_#valid|)) is different from true [2022-12-14 12:57:57,344 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:57:57,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 12:57:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 12:57:57,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:57:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:57:57,504 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:57:57,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2101757877] [2022-12-14 12:57:57,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2101757877] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:57:57,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1513291684] [2022-12-14 12:57:57,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:57:57,504 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:57:57,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:57:57,506 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:57:57,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-12-14 12:57:57,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:57:57,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 12:57:57,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:57:57,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:57:57,635 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:57:57,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 12:57:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 12:57:57,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:57:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:57:57,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1513291684] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:57:57,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329448308] [2022-12-14 12:57:57,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:57:57,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:57:57,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:57:57,770 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:57:57,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:57:57,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:57:57,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:57:57,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:57:57,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:57:57,845 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_24 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_24))))) is different from true [2022-12-14 12:57:57,873 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:57:57,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 12:57:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 12:57:57,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:57:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:57:58,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329448308] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:57:58,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:57:58,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6, 5, 6, 5] total 8 [2022-12-14 12:57:58,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144610651] [2022-12-14 12:57:58,026 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:57:58,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 12:57:58,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:57:58,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 12:57:58,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=32, Unknown=2, NotChecked=22, Total=72 [2022-12-14 12:57:58,028 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) [2022-12-14 12:57:58,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:57:58,382 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2022-12-14 12:57:58,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:57:58,383 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 [2022-12-14 12:57:58,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:57:58,384 INFO L225 Difference]: With dead ends: 85 [2022-12-14 12:57:58,384 INFO L226 Difference]: Without dead ends: 85 [2022-12-14 12:57:58,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 10 SemanticMatches, 8 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=42, Unknown=2, NotChecked=26, Total=90 [2022-12-14 12:57:58,386 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 54 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:57:58,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 155 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 272 Invalid, 0 Unknown, 186 Unchecked, 0.3s Time] [2022-12-14 12:57:58,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-12-14 12:57:58,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2022-12-14 12:57:58,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 73 states have internal predecessors, (80), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-12-14 12:57:58,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2022-12-14 12:57:58,393 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 15 [2022-12-14 12:57:58,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:57:58,393 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2022-12-14 12:57:58,393 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) [2022-12-14 12:57:58,394 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2022-12-14 12:57:58,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 12:57:58,394 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:57:58,394 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:57:58,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-12-14 12:57:58,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2022-12-14 12:57:58,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 12:57:58,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:57:58,999 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)] === [2022-12-14 12:57:59,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:57:59,000 INFO L85 PathProgramCache]: Analyzing trace with hash -27781039, now seen corresponding path program 1 times [2022-12-14 12:57:59,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:57:59,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [695604842] [2022-12-14 12:57:59,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:57:59,003 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:57:59,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:57:59,004 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:57:59,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-14 12:57:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:57:59,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 12:57:59,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:57:59,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:57:59,141 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| |c_ldv_malloc_#in~size|) |c_#length|)) is different from true [2022-12-14 12:57:59,159 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 12:57:59,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 12:57:59,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 12:57:59,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:57:59,344 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:57:59,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [695604842] [2022-12-14 12:57:59,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [695604842] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:57:59,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [148840982] [2022-12-14 12:57:59,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:57:59,345 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:57:59,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:57:59,345 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:57:59,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-12-14 12:57:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:57:59,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 12:57:59,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:57:59,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:57:59,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:57:59,566 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_42 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_42) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-12-14 12:57:59,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:57:59,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 12:57:59,591 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 12:57:59,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 12:57:59,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 12:57:59,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:58:03,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [148840982] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:58:03,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245031463] [2022-12-14 12:58:03,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:03,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:58:03,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:58:03,953 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:58:03,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 12:58:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:04,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 12:58:04,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:04,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:58:04,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:58:04,074 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_52 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_52))))) is different from true [2022-12-14 12:58:04,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:58:04,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 12:58:04,105 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 12:58:04,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 12:58:04,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 12:58:04,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:58:04,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245031463] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:58:04,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:58:04,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-12-14 12:58:04,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270928952] [2022-12-14 12:58:04,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:58:04,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 12:58:04,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:58:04,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 12:58:04,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=172, Unknown=5, NotChecked=84, Total=306 [2022-12-14 12:58:04,255 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 12 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 12:58:05,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:05,156 INFO L93 Difference]: Finished difference Result 150 states and 168 transitions. [2022-12-14 12:58:05,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:58:05,156 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 12 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 15 [2022-12-14 12:58:05,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:05,157 INFO L225 Difference]: With dead ends: 150 [2022-12-14 12:58:05,158 INFO L226 Difference]: Without dead ends: 150 [2022-12-14 12:58:05,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=56, Invalid=223, Unknown=5, NotChecked=96, Total=380 [2022-12-14 12:58:05,159 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 107 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:05,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 257 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 615 Invalid, 0 Unknown, 309 Unchecked, 0.8s Time] [2022-12-14 12:58:05,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-12-14 12:58:05,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 109. [2022-12-14 12:58:05,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 70 states have (on average 1.8) internal successors, (126), 99 states have internal predecessors, (126), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) [2022-12-14 12:58:05,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 147 transitions. [2022-12-14 12:58:05,169 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 147 transitions. Word has length 15 [2022-12-14 12:58:05,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:05,169 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 147 transitions. [2022-12-14 12:58:05,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 12 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 12:58:05,169 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 147 transitions. [2022-12-14 12:58:05,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 12:58:05,170 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:05,170 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:58:05,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2022-12-14 12:58:05,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-14 12:58:05,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 12:58:05,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:58:05,774 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)] === [2022-12-14 12:58:05,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:05,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1824732399, now seen corresponding path program 1 times [2022-12-14 12:58:05,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:58:05,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [449599067] [2022-12-14 12:58:05,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:05,779 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:58:05,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:58:05,780 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:58:05,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-14 12:58:05,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:05,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 12:58:05,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:05,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:58:05,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:58:05,854 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:58:05,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [449599067] [2022-12-14 12:58:05,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [449599067] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:58:05,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:58:05,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 12:58:05,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695184770] [2022-12-14 12:58:05,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:58:05,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:58:05,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:58:05,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:58:05,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:58:05,856 INFO L87 Difference]: Start difference. First operand 109 states and 147 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) [2022-12-14 12:58:05,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:05,903 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2022-12-14 12:58:05,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:58:05,904 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 [2022-12-14 12:58:05,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:05,905 INFO L225 Difference]: With dead ends: 71 [2022-12-14 12:58:05,905 INFO L226 Difference]: Without dead ends: 69 [2022-12-14 12:58:05,905 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 [2022-12-14 12:58:05,906 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:05,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 266 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:58:05,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-12-14 12:58:05,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-12-14 12:58:05,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 63 states have internal predecessors, (66), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 12:58:05,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2022-12-14 12:58:05,910 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 15 [2022-12-14 12:58:05,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:05,910 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2022-12-14 12:58:05,910 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) [2022-12-14 12:58:05,910 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2022-12-14 12:58:05,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 12:58:05,911 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:05,911 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:58:05,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-14 12:58:06,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:58:06,113 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)] === [2022-12-14 12:58:06,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:06,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1259761877, now seen corresponding path program 1 times [2022-12-14 12:58:06,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:58:06,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280445276] [2022-12-14 12:58:06,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:06,116 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:58:06,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:58:06,118 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:58:06,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-14 12:58:06,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:06,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 12:58:06,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:06,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:58:06,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-12-14 12:58:06,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:58:06,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:58:06,278 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:58:06,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280445276] [2022-12-14 12:58:06,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280445276] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:58:06,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:58:06,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 12:58:06,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641722] [2022-12-14 12:58:06,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:58:06,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:58:06,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:58:06,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:58:06,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:58:06,280 INFO L87 Difference]: Start difference. First operand 69 states and 77 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) [2022-12-14 12:58:06,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:06,388 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2022-12-14 12:58:06,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:58:06,388 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 [2022-12-14 12:58:06,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:06,389 INFO L225 Difference]: With dead ends: 78 [2022-12-14 12:58:06,389 INFO L226 Difference]: Without dead ends: 78 [2022-12-14 12:58:06,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:58:06,390 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 6 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:06,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 301 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:58:06,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-12-14 12:58:06,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2022-12-14 12:58:06,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 66 states have internal predecessors, (70), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 12:58:06,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2022-12-14 12:58:06,395 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 20 [2022-12-14 12:58:06,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:06,396 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2022-12-14 12:58:06,396 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) [2022-12-14 12:58:06,396 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2022-12-14 12:58:06,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 12:58:06,396 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:06,397 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:58:06,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-14 12:58:06,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:58:06,599 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)] === [2022-12-14 12:58:06,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:06,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1227750956, now seen corresponding path program 1 times [2022-12-14 12:58:06,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:58:06,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912369393] [2022-12-14 12:58:06,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:06,601 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:58:06,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:58:06,604 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:58:06,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-14 12:58:06,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:06,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 12:58:06,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:06,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:58:06,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:58:06,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:58:06,992 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:58:06,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912369393] [2022-12-14 12:58:06,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912369393] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:58:06,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1081345441] [2022-12-14 12:58:06,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:06,993 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:58:06,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:58:06,994 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:58:06,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-12-14 12:58:07,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:07,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 12:58:07,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:07,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:58:07,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:58:07,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:58:07,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1081345441] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:58:07,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655111986] [2022-12-14 12:58:07,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:07,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:58:07,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:58:07,122 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:58:07,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 12:58:07,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:07,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 12:58:07,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:07,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:58:07,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:58:07,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:58:07,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655111986] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:58:07,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:58:07,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 5, 4] total 9 [2022-12-14 12:58:07,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202325851] [2022-12-14 12:58:07,246 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:58:07,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 12:58:07,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:58:07,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 12:58:07,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-14 12:58:07,247 INFO L87 Difference]: Start difference. First operand 73 states and 81 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) [2022-12-14 12:58:07,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:07,438 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2022-12-14 12:58:07,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 12:58:07,439 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 [2022-12-14 12:58:07,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:07,440 INFO L225 Difference]: With dead ends: 76 [2022-12-14 12:58:07,440 INFO L226 Difference]: Without dead ends: 74 [2022-12-14 12:58:07,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-12-14 12:58:07,441 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 184 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:07,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 178 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:58:07,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-12-14 12:58:07,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-12-14 12:58:07,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 47 states have (on average 1.4893617021276595) internal successors, (70), 66 states have internal predecessors, (70), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 12:58:07,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2022-12-14 12:58:07,444 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 20 [2022-12-14 12:58:07,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:07,445 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2022-12-14 12:58:07,445 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) [2022-12-14 12:58:07,445 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2022-12-14 12:58:07,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 12:58:07,446 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:07,446 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:58:07,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-12-14 12:58:07,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 12:58:07,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2022-12-14 12:58:08,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 12:58:08,048 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)] === [2022-12-14 12:58:08,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:08,050 INFO L85 PathProgramCache]: Analyzing trace with hash -12644306, now seen corresponding path program 1 times [2022-12-14 12:58:08,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:58:08,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [116324356] [2022-12-14 12:58:08,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:08,051 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:58:08,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:58:08,053 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:58:08,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-14 12:58:08,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:08,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 12:58:08,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:08,220 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_entry_point_~a10~0#1.base| (_ BitVec 32))) (and (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~a10~0#1.base| (_ bv0 1))) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~a10~0#1.base|) (_ bv0 1)))) is different from true [2022-12-14 12:58:08,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:58:08,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:58:08,311 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret44#1.base_31| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret44#1.base_31|) (_ bv0 1))) (= |c_ULTIMATE.start_main_old_#valid#1| (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret44#1.base_31| (_ bv0 1))))) is different from false [2022-12-14 12:58:08,312 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:58:08,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [116324356] [2022-12-14 12:58:08,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [116324356] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:58:08,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1950897170] [2022-12-14 12:58:08,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:08,313 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:58:08,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:58:08,314 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:58:08,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-12-14 12:58:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:08,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 12:58:08,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:08,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:58:08,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:58:08,631 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret44#1.base_34| (_ BitVec 32))) (or (= (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret44#1.base_34| (_ bv0 1)) |c_ULTIMATE.start_main_old_#valid#1|) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret44#1.base_34|))))) is different from false [2022-12-14 12:58:08,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1950897170] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:58:08,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342609165] [2022-12-14 12:58:08,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:08,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:58:08,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:58:08,634 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:58:08,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 12:58:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:08,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 12:58:08,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:08,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:58:08,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:58:08,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:58:08,818 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret44#1.base_37| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret44#1.base_37|))) (= |c_ULTIMATE.start_main_old_#valid#1| (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret44#1.base_37| (_ bv0 1))))) is different from false [2022-12-14 12:58:08,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342609165] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:58:08,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:58:08,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 14 [2022-12-14 12:58:08,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127626817] [2022-12-14 12:58:08,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:58:08,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 12:58:08,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:58:08,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 12:58:08,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=149, Unknown=4, NotChecked=108, Total=306 [2022-12-14 12:58:08,821 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 15 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 12:58:09,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:09,462 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2022-12-14 12:58:09,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 12:58:09,463 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 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 [2022-12-14 12:58:09,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:09,464 INFO L225 Difference]: With dead ends: 116 [2022-12-14 12:58:09,464 INFO L226 Difference]: Without dead ends: 111 [2022-12-14 12:58:09,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 95 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 4 IntricatePredicates, 2 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=310, Unknown=4, NotChecked=156, Total=552 [2022-12-14 12:58:09,465 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 140 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:09,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 256 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 367 Invalid, 0 Unknown, 121 Unchecked, 0.5s Time] [2022-12-14 12:58:09,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-12-14 12:58:09,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 67. [2022-12-14 12:58:09,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 40 states have (on average 1.55) internal successors, (62), 60 states have internal predecessors, (62), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 12:58:09,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2022-12-14 12:58:09,468 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 23 [2022-12-14 12:58:09,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:09,468 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2022-12-14 12:58:09,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 12:58:09,469 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2022-12-14 12:58:09,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 12:58:09,469 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:09,469 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:58:09,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 12:58:09,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-14 12:58:09,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2022-12-14 12:58:10,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 12:58:10,072 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)] === [2022-12-14 12:58:10,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:10,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1738347476, now seen corresponding path program 1 times [2022-12-14 12:58:10,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:58:10,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132549247] [2022-12-14 12:58:10,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:10,075 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:58:10,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:58:10,076 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:58:10,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-14 12:58:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:10,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 12:58:10,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:10,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:58:10,181 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:58:10,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 12:58:10,215 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)) |c_#valid|)) is different from true [2022-12-14 12:58:10,225 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:58:10,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 12:58:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2022-12-14 12:58:10,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:58:10,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:58:10,355 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:58:10,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132549247] [2022-12-14 12:58:10,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132549247] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:58:10,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1809181666] [2022-12-14 12:58:10,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:10,355 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:58:10,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:58:10,356 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:58:10,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-12-14 12:58:10,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:10,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 12:58:10,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:10,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:58:10,460 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:58:10,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 12:58:10,490 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:58:10,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 12:58:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2022-12-14 12:58:10,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:58:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:58:10,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1809181666] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:58:10,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765118325] [2022-12-14 12:58:10,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:10,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:58:10,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:58:10,614 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:58:10,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 12:58:10,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:10,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 12:58:10,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:10,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:58:10,670 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:58:10,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 12:58:10,691 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_187 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_187))))) is different from true [2022-12-14 12:58:10,712 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:58:10,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 12:58:10,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2022-12-14 12:58:10,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:58:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:58:10,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765118325] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:58:10,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:58:10,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7, 6, 7, 6] total 9 [2022-12-14 12:58:10,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334816804] [2022-12-14 12:58:10,827 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:58:10,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 12:58:10,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:58:10,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 12:58:10,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=44, Unknown=2, NotChecked=26, Total=90 [2022-12-14 12:58:10,829 INFO L87 Difference]: Start difference. First operand 67 states and 73 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) [2022-12-14 12:58:13,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:13,133 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2022-12-14 12:58:13,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 12:58:13,134 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 [2022-12-14 12:58:13,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:13,134 INFO L225 Difference]: With dead ends: 75 [2022-12-14 12:58:13,134 INFO L226 Difference]: Without dead ends: 75 [2022-12-14 12:58:13,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 126 SyntacticMatches, 10 SemanticMatches, 11 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=30, Invalid=86, Unknown=2, NotChecked=38, Total=156 [2022-12-14 12:58:13,135 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 6 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:13,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 260 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 264 Invalid, 0 Unknown, 156 Unchecked, 0.2s Time] [2022-12-14 12:58:13,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-14 12:58:13,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-12-14 12:58:13,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 46 states have (on average 1.5) internal successors, (69), 65 states have internal predecessors, (69), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-12-14 12:58:13,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2022-12-14 12:58:13,139 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 25 [2022-12-14 12:58:13,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:13,140 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2022-12-14 12:58:13,140 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) [2022-12-14 12:58:13,140 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2022-12-14 12:58:13,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 12:58:13,140 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:13,141 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:58:13,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 12:58:13,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2022-12-14 12:58:13,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-12-14 12:58:13,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:58:13,743 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)] === [2022-12-14 12:58:13,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:13,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1738347475, now seen corresponding path program 1 times [2022-12-14 12:58:13,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:58:13,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533894936] [2022-12-14 12:58:13,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:13,746 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:58:13,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:58:13,747 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:58:13,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-14 12:58:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:13,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 12:58:13,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:13,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:58:13,865 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:58:13,870 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:58:13,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-14 12:58:13,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:58:13,950 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| |c_ldv_malloc_#in~size|) |c_#length|)) is different from true [2022-12-14 12:58:13,966 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 12:58:13,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 12:58:13,983 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-12-14 12:58:13,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:58:14,172 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:58:14,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533894936] [2022-12-14 12:58:14,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [533894936] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:58:14,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [776177980] [2022-12-14 12:58:14,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:14,173 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:58:14,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:58:14,174 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:58:14,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-12-14 12:58:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:14,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 12:58:14,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:14,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:58:14,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:58:14,344 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:58:14,350 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:58:14,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-12-14 12:58:14,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:58:14,452 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_229 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_229) |c_#length|)))) is different from true [2022-12-14 12:58:14,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:58:14,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 12:58:14,471 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 12:58:14,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 12:58:14,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-12-14 12:58:14,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:58:16,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [776177980] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:58:16,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639085998] [2022-12-14 12:58:16,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:16,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:58:16,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:58:16,623 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:58:16,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 12:58:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:16,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 12:58:16,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:16,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:58:16,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:58:16,704 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:58:16,709 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:58:16,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-12-14 12:58:16,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:58:16,762 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_251 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_251))))) is different from true [2022-12-14 12:58:16,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:58:16,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 12:58:16,780 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 12:58:16,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 12:58:16,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-12-14 12:58:16,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:58:16,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639085998] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:58:16,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:58:16,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-14 12:58:16,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433042186] [2022-12-14 12:58:16,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:58:16,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 12:58:16,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:58:16,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 12:58:16,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=231, Unknown=3, NotChecked=96, Total=380 [2022-12-14 12:58:16,948 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 12:58:17,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:17,631 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2022-12-14 12:58:17,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 12:58:17,632 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 25 [2022-12-14 12:58:17,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:17,632 INFO L225 Difference]: With dead ends: 76 [2022-12-14 12:58:17,632 INFO L226 Difference]: Without dead ends: 76 [2022-12-14 12:58:17,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=83, Invalid=388, Unknown=3, NotChecked=126, Total=600 [2022-12-14 12:58:17,633 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 10 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:17,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 403 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 371 Invalid, 0 Unknown, 237 Unchecked, 0.5s Time] [2022-12-14 12:58:17,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-12-14 12:58:17,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2022-12-14 12:58:17,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 46 states have (on average 1.4782608695652173) internal successors, (68), 65 states have internal predecessors, (68), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-12-14 12:58:17,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2022-12-14 12:58:17,637 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 25 [2022-12-14 12:58:17,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:17,637 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2022-12-14 12:58:17,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 12:58:17,638 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2022-12-14 12:58:17,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 12:58:17,638 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:17,638 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:58:17,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 12:58:17,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-14 12:58:18,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2022-12-14 12:58:18,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 12:58:18,241 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)] === [2022-12-14 12:58:18,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:18,242 INFO L85 PathProgramCache]: Analyzing trace with hash 2051061195, now seen corresponding path program 1 times [2022-12-14 12:58:18,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:58:18,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [815331777] [2022-12-14 12:58:18,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:18,244 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:58:18,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:58:18,246 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:58:18,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-12-14 12:58:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:18,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 12:58:18,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:18,326 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:58:18,330 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:58:18,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:58:18,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:58:18,365 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:58:18,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:58:18,365 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:58:18,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [815331777] [2022-12-14 12:58:18,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [815331777] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:58:18,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:58:18,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 12:58:18,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950949427] [2022-12-14 12:58:18,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:58:18,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:58:18,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:58:18,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:58:18,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:58:18,367 INFO L87 Difference]: Start difference. First operand 74 states and 82 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) [2022-12-14 12:58:18,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:18,474 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2022-12-14 12:58:18,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:58:18,474 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 [2022-12-14 12:58:18,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:18,475 INFO L225 Difference]: With dead ends: 69 [2022-12-14 12:58:18,475 INFO L226 Difference]: Without dead ends: 65 [2022-12-14 12:58:18,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:58:18,475 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 2 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:18,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 295 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:58:18,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-14 12:58:18,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-12-14 12:58:18,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 40 states have (on average 1.5) internal successors, (60), 58 states have internal predecessors, (60), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 12:58:18,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2022-12-14 12:58:18,478 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 25 [2022-12-14 12:58:18,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:18,478 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2022-12-14 12:58:18,478 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) [2022-12-14 12:58:18,478 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2022-12-14 12:58:18,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 12:58:18,479 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:18,479 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] [2022-12-14 12:58:18,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-12-14 12:58:18,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:58:18,680 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 12:58:18,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:18,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1606003645, now seen corresponding path program 1 times [2022-12-14 12:58:18,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:58:18,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1149065542] [2022-12-14 12:58:18,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:18,683 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:58:18,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:58:18,686 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:58:18,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-14 12:58:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:18,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 12:58:18,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:18,847 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:58:18,852 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:58:18,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:58:18,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:58:18,941 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 12:58:18,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-12-14 12:58:18,999 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:58:18,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 46 [2022-12-14 12:58:19,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:58:19,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:58:19,084 INFO L321 Elim1Store]: treesize reduction 7, result has 68.2 percent of original size [2022-12-14 12:58:19,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 68 [2022-12-14 12:58:19,125 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:58:19,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1149065542] [2022-12-14 12:58:19,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1149065542] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:58:19,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1576475260] [2022-12-14 12:58:19,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:19,125 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:58:19,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:58:19,126 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:58:19,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-12-14 12:58:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:19,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 12:58:19,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:19,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:58:19,336 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 12:58:19,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 12:58:19,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:58:21,421 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_6| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_24| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_24|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_6|) |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_24|))) is different from true [2022-12-14 12:58:21,486 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 12:58:21,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2022-12-14 12:58:21,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-12-14 12:58:21,528 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-12-14 12:58:21,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:58:21,543 INFO L321 Elim1Store]: treesize reduction 7, result has 58.8 percent of original size [2022-12-14 12:58:21,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-12-14 12:58:21,548 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_316 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_316) |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 [2022-12-14 12:58:21,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1576475260] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:58:21,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794720194] [2022-12-14 12:58:21,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:21,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:58:21,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:58:21,555 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:58:21,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 12:58:21,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:21,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 12:58:21,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:21,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:58:21,646 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 12:58:21,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 12:58:21,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:58:23,674 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_26| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_7| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_26|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_7|) |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_26|))) is different from true [2022-12-14 12:58:23,749 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 12:58:23,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2022-12-14 12:58:23,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-12-14 12:58:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-12-14 12:58:23,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:58:23,784 INFO L321 Elim1Store]: treesize reduction 7, result has 58.8 percent of original size [2022-12-14 12:58:23,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-12-14 12:58:23,790 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_338 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_338) |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 [2022-12-14 12:58:23,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794720194] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:58:23,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:58:23,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 21 [2022-12-14 12:58:23,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178224811] [2022-12-14 12:58:23,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:58:23,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 12:58:23,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:58:23,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 12:58:23,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=452, Unknown=4, NotChecked=180, Total=702 [2022-12-14 12:58:23,799 INFO L87 Difference]: Start difference. First operand 65 states and 70 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) [2022-12-14 12:58:39,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:39,038 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2022-12-14 12:58:39,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 12:58:39,039 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 [2022-12-14 12:58:39,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:39,039 INFO L225 Difference]: With dead ends: 90 [2022-12-14 12:58:39,039 INFO L226 Difference]: Without dead ends: 90 [2022-12-14 12:58:39,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=218, Invalid=1351, Unknown=7, NotChecked=316, Total=1892 [2022-12-14 12:58:39,040 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 193 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:39,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 471 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 637 Invalid, 0 Unknown, 150 Unchecked, 0.6s Time] [2022-12-14 12:58:39,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-12-14 12:58:39,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 68. [2022-12-14 12:58:39,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 60 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 12:58:39,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2022-12-14 12:58:39,043 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 28 [2022-12-14 12:58:39,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:39,043 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2022-12-14 12:58:39,043 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) [2022-12-14 12:58:39,043 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2022-12-14 12:58:39,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 12:58:39,044 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:39,044 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] [2022-12-14 12:58:39,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-12-14 12:58:39,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-12-14 12:58:39,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-14 12:58:39,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:58:39,647 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 12:58:39,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:39,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1606003646, now seen corresponding path program 1 times [2022-12-14 12:58:39,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:58:39,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [329620115] [2022-12-14 12:58:39,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:39,650 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:58:39,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:58:39,651 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:58:39,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-12-14 12:58:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:39,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 12:58:39,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:39,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:58:39,786 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 12:58:39,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 12:58:39,809 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:58:39,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:58:39,964 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 12:58:39,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2022-12-14 12:58:39,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2022-12-14 12:58:40,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-12-14 12:58:40,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 12:58:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:58:40,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:58:40,208 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:58:40,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 54 [2022-12-14 12:58:40,255 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_prenex_5 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_prenex_5) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset|))) (forall ((v_ArrVal_363 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_363) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (or (forall ((v_prenex_5 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 32) (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_prenex_5) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))) (forall ((v_ArrVal_362 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_362) |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 [2022-12-14 12:58:40,282 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:58:40,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [329620115] [2022-12-14 12:58:40,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [329620115] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:58:40,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [553617395] [2022-12-14 12:58:40,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:40,283 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:58:40,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:58:40,283 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:58:40,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-12-14 12:58:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:40,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 12:58:40,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:40,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:58:40,423 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 12:58:40,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 12:58:40,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:58:40,437 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:58:40,558 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 12:58:40,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2022-12-14 12:58:40,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2022-12-14 12:58:40,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-12-14 12:58:40,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 12:58:40,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:58:40,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:58:40,641 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:58:40,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 54 [2022-12-14 12:58:40,690 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_387 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_387) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse1 (bvadd (_ bv4 32) .cse1)))))) (and .cse0 (or (forall ((v_ArrVal_388 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_388) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (and .cse0 (forall ((v_prenex_7 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_prenex_7) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) (_ bv4 32)) (_ bv0 32))))) (forall ((v_prenex_7 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_prenex_7) |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 [2022-12-14 12:58:40,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [553617395] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:58:40,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156434299] [2022-12-14 12:58:40,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:40,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:58:40,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:58:40,721 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:58:40,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 12:58:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:40,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 12:58:40,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:40,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:58:40,836 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 12:58:40,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 12:58:40,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:58:40,848 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:58:40,973 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 12:58:40,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2022-12-14 12:58:40,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2022-12-14 12:58:40,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-12-14 12:58:41,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 12:58:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:58:41,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:58:41,075 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:58:41,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 54 [2022-12-14 12:58:41,138 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_413 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_413) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) (_ bv4 32)) (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset|))) (forall ((v_prenex_10 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_prenex_10) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (or (forall ((v_ArrVal_413 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_413) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) (_ bv4 32)) (_ bv0 32))) (forall ((v_ArrVal_412 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_412) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) |c_ULTIMATE.start_entry_point_#t~mem47#1.base|)))) is different from false [2022-12-14 12:58:41,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156434299] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:58:41,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:58:41,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 12 [2022-12-14 12:58:41,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984181322] [2022-12-14 12:58:41,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:58:41,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 12:58:41,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:58:41,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 12:58:41,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=179, Unknown=3, NotChecked=84, Total=306 [2022-12-14 12:58:41,165 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 12:58:43,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:58:45,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:58:47,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:58:47,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:47,995 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2022-12-14 12:58:47,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 12:58:47,996 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 [2022-12-14 12:58:47,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:47,996 INFO L225 Difference]: With dead ends: 95 [2022-12-14 12:58:47,996 INFO L226 Difference]: Without dead ends: 93 [2022-12-14 12:58:47,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 75 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=498, Unknown=3, NotChecked=144, Total=756 [2022-12-14 12:58:47,997 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 94 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 19 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:47,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 303 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 406 Invalid, 3 Unknown, 0 Unchecked, 6.5s Time] [2022-12-14 12:58:47,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-12-14 12:58:47,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 69. [2022-12-14 12:58:47,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 61 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 12:58:47,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2022-12-14 12:58:47,999 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 28 [2022-12-14 12:58:47,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:47,999 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2022-12-14 12:58:47,999 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) [2022-12-14 12:58:48,000 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2022-12-14 12:58:48,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 12:58:48,000 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:48,000 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] [2022-12-14 12:58:48,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-12-14 12:58:48,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-12-14 12:58:48,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-12-14 12:58:48,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:58:48,603 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 12:58:48,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:48,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1476244126, now seen corresponding path program 1 times [2022-12-14 12:58:48,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:58:48,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550267168] [2022-12-14 12:58:48,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:48,606 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:58:48,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:58:48,609 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:58:48,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-12-14 12:58:48,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:48,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 12:58:48,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:48,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:58:48,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:58:48,694 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:58:48,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550267168] [2022-12-14 12:58:48,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550267168] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:58:48,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:58:48,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:58:48,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014022034] [2022-12-14 12:58:48,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:58:48,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:58:48,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:58:48,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:58:48,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:58:48,696 INFO L87 Difference]: Start difference. First operand 69 states and 73 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) [2022-12-14 12:58:48,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:48,774 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2022-12-14 12:58:48,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:58:48,775 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 [2022-12-14 12:58:48,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:48,775 INFO L225 Difference]: With dead ends: 68 [2022-12-14 12:58:48,775 INFO L226 Difference]: Without dead ends: 68 [2022-12-14 12:58:48,776 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 [2022-12-14 12:58:48,776 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 30 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:48,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 88 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:58:48,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-12-14 12:58:48,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-12-14 12:58:48,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 60 states have internal predecessors, (62), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 12:58:48,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2022-12-14 12:58:48,779 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 30 [2022-12-14 12:58:48,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:48,779 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2022-12-14 12:58:48,779 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) [2022-12-14 12:58:48,779 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2022-12-14 12:58:48,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 12:58:48,779 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:48,779 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] [2022-12-14 12:58:48,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-12-14 12:58:48,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:58:48,981 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 12:58:48,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:48,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1476244127, now seen corresponding path program 1 times [2022-12-14 12:58:48,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:58:48,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1559038643] [2022-12-14 12:58:48,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:48,984 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:58:48,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:58:48,987 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:58:48,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-12-14 12:58:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:49,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:58:49,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:49,120 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:58:49,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:58:49,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 12:58:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:58:49,349 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:58:49,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1559038643] [2022-12-14 12:58:49,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1559038643] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:58:49,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1318228481] [2022-12-14 12:58:49,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:49,350 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:58:49,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:58:49,351 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:58:49,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-12-14 12:58:49,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:49,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 12:58:49,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:49,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:58:49,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:58:49,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 12:58:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:58:49,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1318228481] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:58:49,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224888420] [2022-12-14 12:58:49,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:49,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:58:49,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:58:49,678 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:58:49,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-14 12:58:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:49,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:58:49,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:58:49,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:58:49,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 12:58:49,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:58:49,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224888420] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:58:49,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:58:49,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 11 [2022-12-14 12:58:49,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859141111] [2022-12-14 12:58:49,860 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:58:49,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 12:58:49,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:58:49,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 12:58:49,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:58:49,861 INFO L87 Difference]: Start difference. First operand 68 states and 72 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) [2022-12-14 12:58:50,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:50,242 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2022-12-14 12:58:50,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:58:50,243 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 [2022-12-14 12:58:50,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:50,244 INFO L225 Difference]: With dead ends: 67 [2022-12-14 12:58:50,244 INFO L226 Difference]: Without dead ends: 67 [2022-12-14 12:58:50,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:58:50,244 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 109 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:50,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 205 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:58:50,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-12-14 12:58:50,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-12-14 12:58:50,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 59 states have internal predecessors, (61), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 12:58:50,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2022-12-14 12:58:50,247 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 30 [2022-12-14 12:58:50,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:50,247 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2022-12-14 12:58:50,247 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) [2022-12-14 12:58:50,247 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2022-12-14 12:58:50,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 12:58:50,247 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:50,247 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] [2022-12-14 12:58:50,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-12-14 12:58:50,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-14 12:58:50,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-12-14 12:58:50,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:58:50,849 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 12:58:50,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:50,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1481073420, now seen corresponding path program 1 times [2022-12-14 12:58:50,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:58:50,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820435523] [2022-12-14 12:58:50,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:50,852 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:58:50,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:58:50,855 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:58:50,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-12-14 12:58:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:50,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 12:58:50,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:50,984 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:58:50,989 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:58:51,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 12:58:51,133 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 12:58:51,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 21 [2022-12-14 12:58:51,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:58:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 12:58:51,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:58:51,169 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:58:51,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820435523] [2022-12-14 12:58:51,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820435523] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:58:51,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:58:51,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-14 12:58:51,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768227716] [2022-12-14 12:58:51,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:58:51,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 12:58:51,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:58:51,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 12:58:51,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:58:51,171 INFO L87 Difference]: Start difference. First operand 67 states and 71 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) [2022-12-14 12:58:51,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:51,427 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2022-12-14 12:58:51,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 12:58:51,427 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 [2022-12-14 12:58:51,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:51,428 INFO L225 Difference]: With dead ends: 79 [2022-12-14 12:58:51,428 INFO L226 Difference]: Without dead ends: 79 [2022-12-14 12:58:51,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-12-14 12:58:51,428 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 58 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:51,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 284 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:58:51,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-12-14 12:58:51,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2022-12-14 12:58:51,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 60 states have internal predecessors, (62), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 12:58:51,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2022-12-14 12:58:51,430 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 31 [2022-12-14 12:58:51,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:51,430 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2022-12-14 12:58:51,430 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) [2022-12-14 12:58:51,431 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2022-12-14 12:58:51,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 12:58:51,431 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:51,431 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] [2022-12-14 12:58:51,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-12-14 12:58:51,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:58:51,632 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 12:58:51,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:51,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1481072329, now seen corresponding path program 1 times [2022-12-14 12:58:51,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:58:51,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110280680] [2022-12-14 12:58:51,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:51,635 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:58:51,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:58:51,638 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:58:51,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-12-14 12:58:51,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:51,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:58:51,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:51,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 12:58:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:58:51,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:58:51,760 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:58:51,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1110280680] [2022-12-14 12:58:51,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1110280680] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:58:51,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:58:51,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 12:58:51,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211210649] [2022-12-14 12:58:51,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:58:51,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:58:51,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:58:51,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:58:51,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:58:51,761 INFO L87 Difference]: Start difference. First operand 68 states and 72 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) [2022-12-14 12:58:51,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:51,950 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2022-12-14 12:58:51,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:58:51,950 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 [2022-12-14 12:58:51,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:51,951 INFO L225 Difference]: With dead ends: 71 [2022-12-14 12:58:51,951 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 12:58:51,951 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 [2022-12-14 12:58:51,952 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 16 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:51,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 166 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:58:51,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 12:58:51,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2022-12-14 12:58:51,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 59 states have internal predecessors, (61), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 12:58:51,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2022-12-14 12:58:51,954 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 31 [2022-12-14 12:58:51,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:51,954 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2022-12-14 12:58:51,954 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) [2022-12-14 12:58:51,954 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2022-12-14 12:58:51,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 12:58:51,955 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:51,955 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] [2022-12-14 12:58:51,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-12-14 12:58:52,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:58:52,156 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 12:58:52,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:52,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1481072328, now seen corresponding path program 1 times [2022-12-14 12:58:52,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:58:52,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2107872200] [2022-12-14 12:58:52,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:52,159 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:58:52,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:58:52,162 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:58:52,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-12-14 12:58:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:52,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 12:58:52,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:52,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-12-14 12:58:52,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2022-12-14 12:58:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:58:52,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:58:52,490 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:58:52,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2107872200] [2022-12-14 12:58:52,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2107872200] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:58:52,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:58:52,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 12:58:52,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477791246] [2022-12-14 12:58:52,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:58:52,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:58:52,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:58:52,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:58:52,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:58:52,492 INFO L87 Difference]: Start difference. First operand 67 states and 71 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) [2022-12-14 12:58:53,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:53,000 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2022-12-14 12:58:53,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:58:53,001 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 [2022-12-14 12:58:53,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:53,001 INFO L225 Difference]: With dead ends: 77 [2022-12-14 12:58:53,001 INFO L226 Difference]: Without dead ends: 77 [2022-12-14 12:58:53,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-12-14 12:58:53,002 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 20 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:53,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 181 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:58:53,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-14 12:58:53,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 66. [2022-12-14 12:58:53,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 45 states have (on average 1.3333333333333333) internal successors, (60), 58 states have internal predecessors, (60), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 12:58:53,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-12-14 12:58:53,004 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 31 [2022-12-14 12:58:53,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:53,004 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-12-14 12:58:53,004 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) [2022-12-14 12:58:53,004 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-12-14 12:58:53,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 12:58:53,005 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:53,005 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] [2022-12-14 12:58:53,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-12-14 12:58:53,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:58:53,205 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 12:58:53,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:53,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1331364346, now seen corresponding path program 1 times [2022-12-14 12:58:53,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:58:53,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [939036033] [2022-12-14 12:58:53,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:53,207 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:58:53,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:58:53,208 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:58:53,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-12-14 12:58:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:53,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 12:58:53,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:53,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:58:53,335 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 12:58:53,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 12:58:53,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:58:53,354 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-12-14 12:58:55,406 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_25| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_35| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_35| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_35|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_25|)))) is different from true [2022-12-14 12:58:57,525 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 12:58:57,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2022-12-14 12:58:57,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2022-12-14 12:58:57,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-12-14 12:58:57,604 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 12:58:57,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2022-12-14 12:58:57,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 12:58:57,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:58:58,830 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret48#1.base_47| (_ BitVec 32))) (or (forall ((v_ArrVal_570 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base|) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset| |v_ULTIMATE.start_entry_point_#t~ret48#1.base_47|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_570) |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_47| (_ bv0 32)))) is different from false [2022-12-14 12:58:58,833 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:58:58,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [939036033] [2022-12-14 12:58:58,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [939036033] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:58:58,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [341292830] [2022-12-14 12:58:58,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:58,833 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:58:58,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:58:58,834 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:58:58,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-12-14 12:58:58,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:58,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 12:58:58,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:58,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:58:59,055 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 12:58:59,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 12:58:59,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:58:59,407 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 12:58:59,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-12-14 12:58:59,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-12-14 12:58:59,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:58:59,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:58:59,532 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_592 (Array (_ BitVec 32) (_ BitVec 32)))) (bvult (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_592) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) |c_#StackHeapBarrier|)) is different from false [2022-12-14 12:58:59,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [341292830] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:58:59,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636497240] [2022-12-14 12:58:59,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:59,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:58:59,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:58:59,538 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:58:59,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-14 12:58:59,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:59,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 12:58:59,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:59,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:58:59,706 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 12:58:59,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 12:58:59,763 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:58:59,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:58:59,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:59:01,899 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_27| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_39| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_39| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_39|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_27|)))) is different from true [2022-12-14 12:59:02,024 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 12:59:02,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2022-12-14 12:59:02,160 INFO L321 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2022-12-14 12:59:02,161 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:59:02,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-12-14 12:59:02,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 12:59:02,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:59:02,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-12-14 12:59:07,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636497240] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:59:07,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:59:07,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 18] total 33 [2022-12-14 12:59:07,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318214518] [2022-12-14 12:59:07,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:59:07,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 12:59:07,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:59:07,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 12:59:07,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1369, Unknown=10, NotChecked=308, Total=1806 [2022-12-14 12:59:07,552 INFO L87 Difference]: Start difference. First operand 66 states and 70 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) [2022-12-14 12:59:09,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:59:13,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:59:15,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:59:17,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:59:18,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:59:18,023 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2022-12-14 12:59:18,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 12:59:18,024 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 [2022-12-14 12:59:18,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:59:18,025 INFO L225 Difference]: With dead ends: 96 [2022-12-14 12:59:18,025 INFO L226 Difference]: Without dead ends: 96 [2022-12-14 12:59:18,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=315, Invalid=2771, Unknown=10, NotChecked=444, Total=3540 [2022-12-14 12:59:18,026 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 114 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 45 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:59:18,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 612 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 894 Invalid, 4 Unknown, 171 Unchecked, 9.4s Time] [2022-12-14 12:59:18,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-12-14 12:59:18,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 72. [2022-12-14 12:59:18,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 63 states have internal predecessors, (66), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 12:59:18,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2022-12-14 12:59:18,028 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 32 [2022-12-14 12:59:18,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:59:18,028 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2022-12-14 12:59:18,028 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) [2022-12-14 12:59:18,028 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2022-12-14 12:59:18,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 12:59:18,028 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:59:18,028 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] [2022-12-14 12:59:18,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-12-14 12:59:18,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-12-14 12:59:18,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-12-14 12:59:18,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:59:18,631 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 12:59:18,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:59:18,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1548295403, now seen corresponding path program 1 times [2022-12-14 12:59:18,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:59:18,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049557176] [2022-12-14 12:59:18,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:59:18,632 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:59:18,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:59:18,634 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:59:18,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-12-14 12:59:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:59:18,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 12:59:18,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:59:18,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 12:59:18,738 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:59:18,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:59:18,738 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:59:18,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049557176] [2022-12-14 12:59:18,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049557176] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:59:18,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:59:18,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:59:18,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959642997] [2022-12-14 12:59:18,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:59:18,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:59:18,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:59:18,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:59:18,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:59:18,739 INFO L87 Difference]: Start difference. First operand 72 states and 76 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) [2022-12-14 12:59:18,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:59:18,873 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2022-12-14 12:59:18,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:59:18,874 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 [2022-12-14 12:59:18,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:59:18,874 INFO L225 Difference]: With dead ends: 73 [2022-12-14 12:59:18,874 INFO L226 Difference]: Without dead ends: 73 [2022-12-14 12:59:18,874 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 [2022-12-14 12:59:18,875 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 7 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:59:18,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 136 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:59:18,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-12-14 12:59:18,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-12-14 12:59:18,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 64 states have internal predecessors, (67), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 12:59:18,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2022-12-14 12:59:18,877 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 33 [2022-12-14 12:59:18,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:59:18,877 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2022-12-14 12:59:18,877 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) [2022-12-14 12:59:18,877 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2022-12-14 12:59:18,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 12:59:18,878 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:59:18,878 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] [2022-12-14 12:59:18,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-12-14 12:59:19,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:59:19,079 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 12:59:19,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:59:19,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1617154909, now seen corresponding path program 1 times [2022-12-14 12:59:19,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:59:19,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065301109] [2022-12-14 12:59:19,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:59:19,082 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:59:19,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:59:19,085 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:59:19,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-12-14 12:59:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:59:19,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 12:59:19,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:59:19,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:59:19,290 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 12:59:19,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 12:59:19,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:59:21,355 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_41| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_28| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_41| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_41|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_28|)))) is different from true [2022-12-14 12:59:21,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:59:25,496 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 12:59:25,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2022-12-14 12:59:25,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-12-14 12:59:25,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-12-14 12:59:25,622 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 12:59:25,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 18 [2022-12-14 12:59:25,659 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_661 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_661))))) is different from true [2022-12-14 12:59:25,682 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:59:25,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 12:59:25,685 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 10 not checked. [2022-12-14 12:59:25,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:59:26,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 76 [2022-12-14 12:59:26,197 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_660 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_entry_point_#t~ret48#1.base_56| (_ BitVec 32))) (= |v_ULTIMATE.start_entry_point_#t~ret48#1.base_56| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base|) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset| |v_ULTIMATE.start_entry_point_#t~ret48#1.base_56|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_660) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))) is different from false [2022-12-14 12:59:26,199 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:59:26,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2065301109] [2022-12-14 12:59:26,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2065301109] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:59:26,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1358697311] [2022-12-14 12:59:26,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:59:26,200 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:59:26,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:59:26,201 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:59:26,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-12-14 12:59:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:59:26,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 12:59:26,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:59:26,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:59:28,540 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 12:59:28,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 12:59:28,581 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:59:28,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:59:30,708 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_43| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_43| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_43|) (_ bv0 32))))) is different from true [2022-12-14 12:59:30,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:59:38,944 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 12:59:38,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2022-12-14 12:59:38,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-12-14 12:59:39,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-12-14 12:59:39,212 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 12:59:39,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 18 [2022-12-14 12:59:39,224 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_695 (_ BitVec 1))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_695) |c_#valid|)))) is different from true [2022-12-14 12:59:39,246 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:59:39,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 12:59:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 10 not checked. [2022-12-14 12:59:39,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:59:39,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 76 [2022-12-14 12:59:39,573 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret48#1.base_59| (_ BitVec 32)) (v_ArrVal_660 (Array (_ BitVec 32) (_ BitVec 32)))) (= |v_ULTIMATE.start_entry_point_#t~ret48#1.base_59| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base|) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset| |v_ULTIMATE.start_entry_point_#t~ret48#1.base_59|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_660) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))) is different from false [2022-12-14 12:59:39,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1358697311] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:59:39,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394608115] [2022-12-14 12:59:39,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:59:39,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:59:39,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:59:39,577 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:59:39,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-14 12:59:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:59:39,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 12:59:39,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:59:39,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:59:39,682 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 12:59:39,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 12:59:39,688 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:59:39,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:59:41,713 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_45| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_31| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_45| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_45|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_31|)))) is different from true [2022-12-14 12:59:41,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:59:43,778 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 12:59:43,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2022-12-14 12:59:43,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-12-14 12:59:43,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-12-14 12:59:43,824 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 12:59:43,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 18 [2022-12-14 12:59:43,838 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_729 (_ BitVec 1))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_729) |c_#valid|)))) is different from true [2022-12-14 12:59:43,859 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:59:43,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 12:59:43,862 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 10 not checked. [2022-12-14 12:59:43,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:59:44,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 76 [2022-12-14 12:59:44,203 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_660 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_entry_point_#t~ret48#1.base_62| (_ BitVec 32))) (= |v_ULTIMATE.start_entry_point_#t~ret48#1.base_62| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base|) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset| |v_ULTIMATE.start_entry_point_#t~ret48#1.base_62|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_660) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))) is different from false [2022-12-14 12:59:44,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394608115] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:59:44,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:59:44,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2022-12-14 12:59:44,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338207827] [2022-12-14 12:59:44,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:59:44,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 12:59:44,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:59:44,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 12:59:44,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=892, Unknown=23, NotChecked=612, Total=1640 [2022-12-14 12:59:44,206 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 33 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 27 states have internal predecessors, (53), 6 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-14 12:59:46,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:59:52,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:00:06,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:00:06,605 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2022-12-14 13:00:06,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 13:00:06,606 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 27 states have internal predecessors, (53), 6 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 37 [2022-12-14 13:00:06,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:00:06,607 INFO L225 Difference]: With dead ends: 85 [2022-12-14 13:00:06,607 INFO L226 Difference]: Without dead ends: 85 [2022-12-14 13:00:06,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 101 SyntacticMatches, 11 SemanticMatches, 53 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 40.5s TimeCoverageRelationStatistics Valid=262, Invalid=1817, Unknown=27, NotChecked=864, Total=2970 [2022-12-14 13:00:06,609 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 78 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 34 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 414 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:00:06,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 447 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 758 Invalid, 2 Unknown, 414 Unchecked, 5.7s Time] [2022-12-14 13:00:06,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-12-14 13:00:06,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2022-12-14 13:00:06,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 55 states have (on average 1.290909090909091) internal successors, (71), 67 states have internal predecessors, (71), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 13:00:06,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2022-12-14 13:00:06,613 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 37 [2022-12-14 13:00:06,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:00:06,613 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2022-12-14 13:00:06,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 27 states have internal predecessors, (53), 6 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-14 13:00:06,613 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2022-12-14 13:00:06,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 13:00:06,614 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:06,614 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] [2022-12-14 13:00:06,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-12-14 13:00:06,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-12-14 13:00:07,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-12-14 13:00:07,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:00:07,215 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 13:00:07,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:07,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1617154908, now seen corresponding path program 1 times [2022-12-14 13:00:07,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:00:07,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017653698] [2022-12-14 13:00:07,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:07,217 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:00:07,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:00:07,218 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:00:07,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-12-14 13:00:07,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:07,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-14 13:00:07,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:07,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 13:00:07,455 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 13:00:07,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 13:00:07,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:00:09,534 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_32| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_47| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_47|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_32|) |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_47|))) is different from true [2022-12-14 13:00:11,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 13:00:11,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 13:00:13,781 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 13:00:13,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2022-12-14 13:00:13,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 50 [2022-12-14 13:00:14,036 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-12-14 13:00:14,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 45 [2022-12-14 13:00:14,040 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:00:14,118 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_763 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_763) |c_#length|)))) is different from true [2022-12-14 13:00:14,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:14,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 13:00:14,142 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 13:00:14,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 13:00:14,171 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-12-14 13:00:14,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:00:16,544 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:00:16,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017653698] [2022-12-14 13:00:16,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017653698] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:00:16,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1170507755] [2022-12-14 13:00:16,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:16,544 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:00:16,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:00:16,545 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:00:16,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-12-14 13:00:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:16,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-14 13:00:16,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:16,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 13:00:16,970 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 13:00:16,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 13:00:17,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:00:17,052 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:00:17,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 13:00:17,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 13:00:17,792 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:00:17,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2022-12-14 13:00:17,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 53 [2022-12-14 13:00:18,208 INFO L321 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-12-14 13:00:18,208 INFO L350 Elim1Store]: Elim1 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 78 treesize of output 44 [2022-12-14 13:00:18,217 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 13:00:18,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-12-14 13:00:18,243 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_798 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_798) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-12-14 13:00:18,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:18,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 13:00:18,271 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 13:00:18,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 13:00:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-12-14 13:00:18,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:00:20,350 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_ULTIMATE.start_alloc_10_#t~mem39#1.offset| (_ bv4 32)))) (and (or (forall ((|v_ldv_malloc_#res.base_222| (_ BitVec 32))) (not (= (select |c_#valid| |v_ldv_malloc_#res.base_222|) (_ bv0 1)))) (bvule |c_ULTIMATE.start_alloc_10_#t~mem39#1.offset| .cse0)) (forall ((|v_ldv_malloc_#res.base_222| (_ BitVec 32))) (or (forall ((v_ArrVal_801 (_ BitVec 32))) (bvule .cse0 (select (store |c_#length| |v_ldv_malloc_#res.base_222| v_ArrVal_801) |c_ULTIMATE.start_alloc_10_#t~mem39#1.base|))) (not (= (select |c_#valid| |v_ldv_malloc_#res.base_222|) (_ bv0 1))))))) is different from false [2022-12-14 13:00:20,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1170507755] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:00:20,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903541392] [2022-12-14 13:00:20,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:20,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:20,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:00:20,356 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:00:20,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-14 13:00:20,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:20,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-14 13:00:20,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:20,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 13:00:20,489 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 13:00:20,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 13:00:20,496 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:00:20,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:00:22,527 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_35| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_51| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_51| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_51|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_35|)))) is different from true [2022-12-14 13:00:22,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 13:00:22,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 13:00:22,639 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 13:00:22,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2022-12-14 13:00:22,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 50 [2022-12-14 13:00:22,745 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-12-14 13:00:22,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 45 [2022-12-14 13:00:22,755 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:00:22,777 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_833 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_833) |c_#length|)))) is different from true [2022-12-14 13:00:22,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:22,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 13:00:22,801 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 13:00:22,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 13:00:22,806 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-12-14 13:00:22,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:00:25,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903541392] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:00:25,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:00:25,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 37 [2022-12-14 13:00:25,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369423789] [2022-12-14 13:00:25,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:00:25,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-14 13:00:25,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:00:25,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-14 13:00:25,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1086, Unknown=7, NotChecked=426, Total=1640 [2022-12-14 13:00:25,093 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand has 38 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 28 states have internal predecessors, (55), 6 states have call successors, (7), 6 states have call predecessors, (7), 9 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-14 13:00:27,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:00:29,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:00:33,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:00:35,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:00:41,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:00:41,609 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2022-12-14 13:00:41,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 13:00:41,609 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 28 states have internal predecessors, (55), 6 states have call successors, (7), 6 states have call predecessors, (7), 9 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 37 [2022-12-14 13:00:41,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:00:41,609 INFO L225 Difference]: With dead ends: 102 [2022-12-14 13:00:41,609 INFO L226 Difference]: Without dead ends: 102 [2022-12-14 13:00:41,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=267, Invalid=2101, Unknown=8, NotChecked=594, Total=2970 [2022-12-14 13:00:41,610 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 141 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 52 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 431 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:00:41,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 573 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 837 Invalid, 4 Unknown, 431 Unchecked, 9.5s Time] [2022-12-14 13:00:41,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-12-14 13:00:41,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 77. [2022-12-14 13:00:41,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 67 states have internal predecessors, (70), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 13:00:41,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2022-12-14 13:00:41,613 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 37 [2022-12-14 13:00:41,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:00:41,613 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2022-12-14 13:00:41,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 28 states have internal predecessors, (55), 6 states have call successors, (7), 6 states have call predecessors, (7), 9 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-14 13:00:41,613 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2022-12-14 13:00:41,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 13:00:41,613 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:41,613 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] [2022-12-14 13:00:41,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-12-14 13:00:41,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-12-14 13:00:42,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2022-12-14 13:00:42,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 13:00:42,216 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 13:00:42,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:42,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1614444768, now seen corresponding path program 1 times [2022-12-14 13:00:42,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:00:42,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [852263559] [2022-12-14 13:00:42,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:42,218 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:00:42,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:00:42,219 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:00:42,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-12-14 13:00:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:42,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 13:00:42,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:42,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 18 [2022-12-14 13:00:42,392 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (not (= |ldv_malloc_#res.base| (_ bv0 32))) (exists ((v_ArrVal_855 (_ BitVec 1))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_855) |c_#valid|)))) is different from true [2022-12-14 13:00:42,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 18 [2022-12-14 13:00:42,590 INFO L321 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2022-12-14 13:00:42,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2022-12-14 13:00:42,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-12-14 13:00:42,678 INFO L321 Elim1Store]: treesize reduction 32, result has 27.3 percent of original size [2022-12-14 13:00:42,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 39 [2022-12-14 13:00:42,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 4 not checked. [2022-12-14 13:00:42,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:00:42,966 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:00:42,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2022-12-14 13:00:42,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-12-14 13:00:43,125 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:00:43,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [852263559] [2022-12-14 13:00:43,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [852263559] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:00:43,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [928499583] [2022-12-14 13:00:43,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:43,125 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:00:43,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:00:43,126 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:00:43,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-12-14 13:00:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:43,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 13:00:43,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:43,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 13:00:43,375 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 13:00:43,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 13:00:43,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:00:43,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 13:00:47,639 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 13:00:47,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2022-12-14 13:00:47,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-12-14 13:00:47,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 13:00:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:47,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:00:47,802 WARN L837 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| |c_ULTIMATE.start_entry_point_~a10~0#1.base|))) (forall ((v_ArrVal_877 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= |c_ULTIMATE.start_entry_point_~a10~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_877) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))))) is different from false [2022-12-14 13:00:47,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [928499583] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:00:47,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098754455] [2022-12-14 13:00:47,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:47,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:47,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:00:47,818 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:00:47,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-14 13:00:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:47,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 13:00:47,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:48,233 INFO L321 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2022-12-14 13:00:48,233 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:00:48,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-12-14 13:00:48,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 13:00:48,394 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 13:00:48,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:00:48,693 INFO L321 Elim1Store]: treesize reduction 3, result has 80.0 percent of original size [2022-12-14 13:00:48,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:00:48,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-12-14 13:00:48,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 13:00:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 13:00:48,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098754455] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:00:48,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-12-14 13:00:48,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10, 10] total 36 [2022-12-14 13:00:48,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216601178] [2022-12-14 13:00:48,764 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-12-14 13:00:48,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-14 13:00:48,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:00:48,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-14 13:00:48,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1501, Unknown=4, NotChecked=162, Total=1892 [2022-12-14 13:00:48,765 INFO L87 Difference]: Start difference. First operand 77 states and 83 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) [2022-12-14 13:00:50,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:00:54,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:00:57,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:01:06,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:01:06,692 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2022-12-14 13:01:06,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 13:01:06,693 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 [2022-12-14 13:01:06,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:01:06,693 INFO L225 Difference]: With dead ends: 80 [2022-12-14 13:01:06,693 INFO L226 Difference]: Without dead ends: 80 [2022-12-14 13:01:06,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 2 IntricatePredicates, 4 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=489, Invalid=2935, Unknown=6, NotChecked=230, Total=3660 [2022-12-14 13:01:06,696 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 139 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 54 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:01:06,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 376 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 720 Invalid, 4 Unknown, 63 Unchecked, 7.1s Time] [2022-12-14 13:01:06,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-14 13:01:06,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-12-14 13:01:06,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 70 states have internal predecessors, (73), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 13:01:06,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2022-12-14 13:01:06,699 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 36 [2022-12-14 13:01:06,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:01:06,699 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2022-12-14 13:01:06,700 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) [2022-12-14 13:01:06,700 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2022-12-14 13:01:06,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 13:01:06,700 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:01:06,700 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] [2022-12-14 13:01:06,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-12-14 13:01:06,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2022-12-14 13:01:07,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-12-14 13:01:07,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:01:07,303 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 13:01:07,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:01:07,304 INFO L85 PathProgramCache]: Analyzing trace with hash -2127689086, now seen corresponding path program 1 times [2022-12-14 13:01:07,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:01:07,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1448401275] [2022-12-14 13:01:07,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:01:07,305 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:01:07,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:01:07,308 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:01:07,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-12-14 13:01:07,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:01:07,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 13:01:07,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:01:07,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 13:01:07,481 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 13:01:07,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 13:01:07,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:01:09,565 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_60| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_43| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_60| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_60|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_43|)))) is different from true [2022-12-14 13:01:11,731 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 13:01:11,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2022-12-14 13:01:11,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-12-14 13:01:11,880 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-12-14 13:01:11,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 36 [2022-12-14 13:01:11,886 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:01:11,925 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 13:01:11,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:01:29,469 WARN L233 SmtUtils]: Spent 5.29s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:01:29,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 112 [2022-12-14 13:01:29,700 INFO L321 Elim1Store]: treesize reduction 14, result has 54.8 percent of original size [2022-12-14 13:01:29,700 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:01:30,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 14 refuted. 2 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:01:30,309 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:01:30,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1448401275] [2022-12-14 13:01:30,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1448401275] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:01:30,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [284327849] [2022-12-14 13:01:30,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:01:30,309 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:01:30,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:01:30,310 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:01:30,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-12-14 13:01:30,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:01:30,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 13:01:30,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:01:30,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 13:01:31,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 13:01:31,331 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 13:01:31,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 13:01:31,477 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:01:31,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:01:31,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-12-14 13:01:32,534 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:01:32,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 46 [2022-12-14 13:01:32,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2022-12-14 13:01:33,262 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:01:33,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:02:21,733 WARN L233 SmtUtils]: Spent 8.25s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:02:41,007 INFO L321 Elim1Store]: treesize reduction 109, result has 29.2 percent of original size [2022-12-14 13:02:41,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 797 treesize of output 769 [2022-12-14 13:02:41,283 INFO L321 Elim1Store]: treesize reduction 53, result has 36.1 percent of original size [2022-12-14 13:02:41,283 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:02:41,462 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-12-14 13:02:41,463 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:02:41,624 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-12-14 13:02:41,624 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:02:42,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 13:02:42,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 13:02:42,356 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:02:42,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 88 [2022-12-14 13:02:42,614 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:02:42,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2022-12-14 13:02:44,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:44,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 13:02:46,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:46,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 13:02:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:02:50,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [284327849] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:02:50,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755032650] [2022-12-14 13:02:50,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:50,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:50,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:02:50,895 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:02:50,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-12-14 13:02:50,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:50,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 13:02:50,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:02:51,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 13:02:51,120 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 13:02:51,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 13:02:51,143 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:02:51,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:02:53,253 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_49| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_68| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_68|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_49|) |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_68|))) is different from true [2022-12-14 13:02:53,550 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 13:02:53,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2022-12-14 13:02:53,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-12-14 13:02:53,697 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-12-14 13:02:53,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 36 [2022-12-14 13:02:53,716 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:02:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 13:02:53,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:03:09,262 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:03:09,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 420 treesize of output 364 [2022-12-14 13:03:09,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:03:09,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 493 treesize of output 429 [2022-12-14 13:03:09,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:03:09,968 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 14 refuted. 2 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:03:09,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755032650] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:03:09,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:03:09,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 17, 18, 16, 15] total 55 [2022-12-14 13:03:09,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085332535] [2022-12-14 13:03:09,969 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:03:09,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-14 13:03:09,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:03:09,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-14 13:03:09,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2506, Unknown=25, NotChecked=206, Total=2970 [2022-12-14 13:03:09,971 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 55 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 45 states have internal predecessors, (93), 9 states have call successors, (12), 9 states have call predecessors, (12), 12 states have return successors, (12), 11 states have call predecessors, (12), 9 states have call successors, (12) [2022-12-14 13:03:30,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:03:32,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:03:35,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:03:51,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:03:53,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:03:55,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:03:57,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:04:00,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:04:02,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:04:04,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:04:06,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:04:08,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:04:25,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:04:30,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:04:34,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:04:38,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:06:07,423 WARN L233 SmtUtils]: Spent 37.00s on a formula simplification. DAG size of input: 117 DAG size of output: 111 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:06:09,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:06:11,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:06:12,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:06:14,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:06:16,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:06:18,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:06:20,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:06:22,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:06:24,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:06:26,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:06:28,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:06:30,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:06:32,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 13:06:38,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:06:38,908 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2022-12-14 13:06:38,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 13:06:38,910 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 45 states have internal predecessors, (93), 9 states have call successors, (12), 9 states have call predecessors, (12), 12 states have return successors, (12), 11 states have call predecessors, (12), 9 states have call successors, (12) Word has length 37 [2022-12-14 13:06:38,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:06:38,911 INFO L225 Difference]: With dead ends: 80 [2022-12-14 13:06:38,911 INFO L226 Difference]: Without dead ends: 80 [2022-12-14 13:06:38,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 159 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 246.9s TimeCoverageRelationStatistics Valid=494, Invalid=4424, Unknown=60, NotChecked=278, Total=5256 [2022-12-14 13:06:38,913 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 70 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 27 mSolverCounterUnsat, 23 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 23 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 76.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:06:38,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 611 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1066 Invalid, 23 Unknown, 138 Unchecked, 76.6s Time] [2022-12-14 13:06:38,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-14 13:06:38,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2022-12-14 13:06:38,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 65 states have internal predecessors, (67), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 13:06:38,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2022-12-14 13:06:38,916 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 37 [2022-12-14 13:06:38,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:06:38,916 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2022-12-14 13:06:38,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 45 states have internal predecessors, (93), 9 states have call successors, (12), 9 states have call predecessors, (12), 12 states have return successors, (12), 11 states have call predecessors, (12), 9 states have call successors, (12) [2022-12-14 13:06:38,916 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2022-12-14 13:06:38,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 13:06:38,917 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:06:38,917 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] [2022-12-14 13:06:38,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-12-14 13:06:39,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2022-12-14 13:06:39,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-12-14 13:06:39,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:39,519 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 13:06:39,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:06:39,521 INFO L85 PathProgramCache]: Analyzing trace with hash -998224317, now seen corresponding path program 1 times [2022-12-14 13:06:39,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:06:39,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1375886649] [2022-12-14 13:06:39,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:39,523 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:06:39,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:06:39,524 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:06:39,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-12-14 13:06:39,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:39,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-14 13:06:39,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:41,002 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:06:41,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:06:41,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:06:42,088 INFO L321 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-12-14 13:06:42,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-12-14 13:06:43,229 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 13:06:43,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 43 [2022-12-14 13:06:44,946 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:06:44,946 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:06:54,206 WARN L859 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32))) (exists ((|v_ULTIMATE.start_entry_point_#t~mem53#1.base_17| (_ BitVec 32)) (v_ArrVal_1009 (_ BitVec 1)) (|ULTIMATE.start_entry_point_~a10~0#1.base| (_ BitVec 32))) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~a10~0#1.base| v_ArrVal_1009))) (and (= (select .cse0 |v_ULTIMATE.start_entry_point_#t~mem53#1.base_17|) (_ bv0 1)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~a10~0#1.base|) (_ bv0 1)) (not (= |ULTIMATE.start_entry_point_~a10~0#1.base| (_ bv0 32))) (not (= |ULTIMATE.start_entry_point_~a10~0#1.base| |v_ULTIMATE.start_entry_point_#t~mem53#1.base_17|)) (= |c_#valid| (store (store .cse0 |v_ULTIMATE.start_entry_point_#t~mem53#1.base_17| (_ bv0 1)) |ULTIMATE.start_entry_point_~a10~0#1.base| (_ bv0 1))) (not (= |v_ULTIMATE.start_entry_point_#t~mem53#1.base_17| (_ bv0 32))))))) is different from true [2022-12-14 13:06:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:06:54,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:06:56,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-12-14 13:07:54,505 WARN L233 SmtUtils]: Spent 38.33s on a formula simplification. DAG size of input: 51 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:07:54,507 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:07:54,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1375886649] [2022-12-14 13:07:54,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1375886649] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:07:54,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [516948233] [2022-12-14 13:07:54,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:07:54,507 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:07:54,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:07:54,508 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:07:54,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-12-14 13:07:54,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:07:54,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 13:07:54,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:07:56,591 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:07:57,592 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2022-12-14 13:07:57,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2022-12-14 13:08:06,532 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 13:08:06,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2022-12-14 13:08:06,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-12-14 13:08:09,928 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_entry_point_~a10~0#1.base| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~mem53#1.base_19| (_ BitVec 32))) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~a10~0#1.base| (_ bv1 1)))) (and (= (_ bv0 1) (select .cse0 |v_ULTIMATE.start_entry_point_#t~mem53#1.base_19|)) (= (store (store .cse0 |v_ULTIMATE.start_entry_point_#t~mem53#1.base_19| (_ bv0 1)) |ULTIMATE.start_entry_point_~a10~0#1.base| (_ bv0 1)) |c_#valid|) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~a10~0#1.base|) (_ bv0 1))))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32)))) is different from true [2022-12-14 13:08:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:08:09,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:08:10,161 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1035 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_old_#valid#1| (store (store |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_1035) |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 [2022-12-14 13:08:10,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [516948233] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:08:10,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769893935] [2022-12-14 13:08:10,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:10,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:10,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:08:10,255 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:08:10,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-12-14 13:08:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:10,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 13:08:10,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:08:11,900 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:08:12,775 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-12-14 13:08:12,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2022-12-14 13:08:19,699 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 13:08:19,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2022-12-14 13:08:20,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2022-12-14 13:08:42,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:08:42,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:08:43,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769893935] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:08:43,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:08:43,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 16] total 41 [2022-12-14 13:08:43,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063360528] [2022-12-14 13:08:43,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:08:43,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-14 13:08:43,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:08:43,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-14 13:08:43,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2496, Unknown=38, NotChecked=312, Total=3080 [2022-12-14 13:08:43,627 INFO L87 Difference]: Start difference. First operand 74 states and 76 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) [2022-12-14 13:08:45,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:08:48,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:08:52,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:08:55,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:08:59,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:09:02,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:09:19,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:09:23,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:09:27,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:09:34,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:09:35,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:09:35,327 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2022-12-14 13:09:35,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 13:09:35,328 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 [2022-12-14 13:09:35,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:09:35,329 INFO L225 Difference]: With dead ends: 78 [2022-12-14 13:09:35,329 INFO L226 Difference]: Without dead ends: 62 [2022-12-14 13:09:35,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 107 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1655 ImplicationChecksByTransitivity, 137.1s TimeCoverageRelationStatistics Valid=477, Invalid=4460, Unknown=45, NotChecked=420, Total=5402 [2022-12-14 13:09:35,331 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 84 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 33 mSolverCounterUnsat, 22 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 22 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 29.9s IncrementalHoareTripleChecker+Time [2022-12-14 13:09:35,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 577 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1156 Invalid, 22 Unknown, 142 Unchecked, 29.9s Time] [2022-12-14 13:09:35,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-12-14 13:09:35,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-12-14 13:09:35,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 52 states have internal predecessors, (53), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 13:09:35,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2022-12-14 13:09:35,333 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 38 [2022-12-14 13:09:35,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:09:35,334 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2022-12-14 13:09:35,334 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) [2022-12-14 13:09:35,334 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2022-12-14 13:09:35,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 13:09:35,334 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:09:35,334 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] [2022-12-14 13:09:35,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2022-12-14 13:09:35,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-12-14 13:09:35,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-12-14 13:09:35,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:09:35,937 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 13:09:35,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:09:35,937 INFO L85 PathProgramCache]: Analyzing trace with hash -424914424, now seen corresponding path program 1 times [2022-12-14 13:09:35,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:09:35,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280737718] [2022-12-14 13:09:35,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:09:35,939 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:09:35,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:09:35,941 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:09:35,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-12-14 13:09:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:09:36,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-14 13:09:36,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:09:36,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 13:09:36,514 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 13:09:36,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 13:09:36,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:09:36,670 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-12-14 13:09:37,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 13:09:43,580 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:09:43,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 13:09:43,986 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 13:09:43,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 39 [2022-12-14 13:09:44,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2022-12-14 13:09:44,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-12-14 13:09:45,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 13:09:51,638 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_57| (_ BitVec 32)) (|ULTIMATE.start_alloc_10_#t~mem38#1.offset| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_80| (_ BitVec 32))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_80|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_57|))) (and (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_80| (select (select |c_#memory_$Pointer$.base| .cse0) |ULTIMATE.start_alloc_10_#t~mem38#1.offset|))) (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_80| .cse0))))) (exists ((v_ArrVal_1097 (_ BitVec 1)) (|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_1097) |c_#valid|)))) is different from true [2022-12-14 13:09:51,934 INFO L321 Elim1Store]: treesize reduction 56, result has 35.6 percent of original size [2022-12-14 13:09:51,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 51 [2022-12-14 13:09:52,332 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-12-14 13:09:52,332 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:09:52,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:09:52,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-12-14 13:09:52,979 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-12-14 13:09:52,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:09:53,430 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1098 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1098) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (_ bv1 1)))) is different from false [2022-12-14 13:09:53,684 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1101 (_ BitVec 1)) (v_ArrVal_1098 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ldv_malloc_#res.base_314| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_ldv_malloc_#res.base_314|) (_ bv0 1))) (= (_ bv0 1) (bvadd (select (store |c_#valid| |v_ldv_malloc_#res.base_314| v_ArrVal_1101) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1098) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (_ bv1 1))))) is different from false [2022-12-14 13:09:53,691 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:09:53,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280737718] [2022-12-14 13:09:53,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280737718] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:09:53,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [143065762] [2022-12-14 13:09:53,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:09:53,692 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:09:53,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:09:53,693 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:09:53,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-12-14 13:09:53,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:09:53,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-14 13:09:53,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:09:53,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 13:09:54,888 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 13:09:54,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 13:09:55,086 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:09:55,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:09:55,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 13:10:12,519 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 13:10:12,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 13:10:13,113 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 13:10:13,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 39 [2022-12-14 13:10:13,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2022-12-14 13:10:14,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-12-14 13:10:14,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-12-14 13:10:25,337 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1136 (_ BitVec 1)) (|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_1136)))) (exists ((|ULTIMATE.start_alloc_10_#t~mem38#1.offset| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_83| (_ BitVec 32))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_83|) (_ bv0 32)))) (and (not (= (select (select |c_#memory_$Pointer$.base| .cse0) |ULTIMATE.start_alloc_10_#t~mem38#1.offset|) |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_83|)) (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_83| .cse0)))))) is different from true [2022-12-14 13:10:25,518 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-12-14 13:10:25,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 35 [2022-12-14 13:10:26,073 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-12-14 13:10:26,074 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:10:26,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:10:26,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-12-14 13:10:26,533 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-12-14 13:10:26,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:10:26,613 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1137 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1137) |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 [2022-12-14 13:10:26,849 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1140 (_ BitVec 1)) (|v_ldv_malloc_#res.base_317| (_ BitVec 32)) (v_ArrVal_1137 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ldv_malloc_#res.base_317|))) (= (_ bv0 1) (bvadd (select (store |c_#valid| |v_ldv_malloc_#res.base_317| v_ArrVal_1140) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1137) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (_ bv1 1))))) is different from false [2022-12-14 13:10:26,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [143065762] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:10:26,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708896910] [2022-12-14 13:10:26,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:10:26,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:10:26,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:10:26,858 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:10:26,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-12-14 13:10:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:10:26,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-14 13:10:26,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:10:26,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 13:10:31,505 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:10:31,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 13:10:31,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:10:31,934 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:10:32,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 13:10:43,219 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-12-14 13:10:43,219 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:10:43,834 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 13:10:43,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 43 [2022-12-14 13:10:43,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 47 [2022-12-14 13:10:45,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2022-12-14 13:10:46,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-12-14 13:10:50,625 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_alloc_10_#t~mem38#1.offset| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_86| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_62| (_ BitVec 32))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_86|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_62|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| .cse1) |ULTIMATE.start_alloc_10_#t~mem38#1.offset|))) (and (not (= .cse0 .cse1)) (not (= .cse0 |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_86|)) (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_86| .cse1)))))) (exists ((v_ArrVal_1176 (_ BitVec 1)) (|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_1176))))) is different from true [2022-12-14 13:10:50,879 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-12-14 13:10:50,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 35 [2022-12-14 13:10:51,491 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-12-14 13:10:51,491 INFO L350 Elim1Store]: Elim1 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 62 treesize of output 55 [2022-12-14 13:10:52,126 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 13:10:52,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 26 [2022-12-14 13:10:52,138 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-12-14 13:10:52,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:10:52,210 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1177 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1177) |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 [2022-12-14 13:10:52,478 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1177 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ldv_malloc_#res.base_320| (_ BitVec 32)) (v_ArrVal_1180 (_ BitVec 1))) (or (= (bvadd (select (store |c_#valid| |v_ldv_malloc_#res.base_320| v_ArrVal_1180) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1177) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (_ bv1 1)) (_ bv0 1)) (not (= (_ bv0 1) (select |c_#valid| |v_ldv_malloc_#res.base_320|))))) is different from false [2022-12-14 13:10:52,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708896910] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:10:52,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:10:52,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 49 [2022-12-14 13:10:52,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364345018] [2022-12-14 13:10:52,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:10:52,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 13:10:52,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:10:52,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 13:10:52,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=2064, Unknown=32, NotChecked=900, Total=3192 [2022-12-14 13:10:52,490 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 50 states, 46 states have (on average 1.8043478260869565) internal successors, (83), 42 states have internal predecessors, (83), 9 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) [2022-12-14 13:10:54,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:10:56,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:10:59,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:11:01,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:11:03,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:11:05,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:11:07,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:11:09,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:11:11,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:11:13,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:11:15,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:11:17,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:11:25,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:11:27,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:11:29,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:11:31,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:11:34,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:11:36,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:11:38,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:12:02,894 WARN L233 SmtUtils]: Spent 8.16s on a formula simplification. DAG size of input: 87 DAG size of output: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:12:06,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:12:07,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:12:07,510 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2022-12-14 13:12:07,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 13:12:07,511 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 46 states have (on average 1.8043478260869565) internal successors, (83), 42 states have internal predecessors, (83), 9 states have call successors, (9), 7 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 [2022-12-14 13:12:07,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:12:07,512 INFO L225 Difference]: With dead ends: 65 [2022-12-14 13:12:07,512 INFO L226 Difference]: Without dead ends: 65 [2022-12-14 13:12:07,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 80 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 98.8s TimeCoverageRelationStatistics Valid=415, Invalid=3490, Unknown=37, NotChecked=1170, Total=5112 [2022-12-14 13:12:07,514 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 145 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 53 mSolverCounterUnsat, 26 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 26 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 45.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:12:07,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 587 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 812 Invalid, 26 Unknown, 183 Unchecked, 45.0s Time] [2022-12-14 13:12:07,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-14 13:12:07,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2022-12-14 13:12:07,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 54 states have internal predecessors, (55), 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) [2022-12-14 13:12:07,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2022-12-14 13:12:07,517 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 41 [2022-12-14 13:12:07,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:12:07,517 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2022-12-14 13:12:07,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 46 states have (on average 1.8043478260869565) internal successors, (83), 42 states have internal predecessors, (83), 9 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) [2022-12-14 13:12:07,517 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2022-12-14 13:12:07,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 13:12:07,518 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:12:07,518 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] [2022-12-14 13:12:07,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-12-14 13:12:07,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-12-14 13:12:07,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (58)] Ended with exit code 0 [2022-12-14 13:12:08,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 13:12:08,120 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 13:12:08,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:12:08,121 INFO L85 PathProgramCache]: Analyzing trace with hash -424914423, now seen corresponding path program 1 times [2022-12-14 13:12:08,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:12:08,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2072941122] [2022-12-14 13:12:08,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:12:08,123 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:12:08,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:12:08,124 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:12:08,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-12-14 13:12:08,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:12:08,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-14 13:12:08,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:12:08,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 13:12:08,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 13:12:09,058 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:12:09,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 13:12:09,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:12:09,382 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:12:10,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 13:12:10,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-12-14 13:12:12,846 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:12:12,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2022-12-14 13:12:13,048 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-12-14 13:12:13,048 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:12:13,533 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 13:12:13,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 48 [2022-12-14 13:12:13,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 52 [2022-12-14 13:12:15,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-12-14 13:12:15,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-12-14 13:12:18,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:18,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:12:18,093 INFO L321 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2022-12-14 13:12:18,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-12-14 13:12:18,622 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-12-14 13:12:18,622 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:12:18,703 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 13:12:18,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 61 [2022-12-14 13:12:19,193 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-12-14 13:12:19,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 24 [2022-12-14 13:12:19,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:12:19,469 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:12:19,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:12:20,213 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1219 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1219) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_1220 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1219 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1219) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1220) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))))) is different from false [2022-12-14 13:12:25,705 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:12:25,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2072941122] [2022-12-14 13:12:25,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2072941122] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:12:25,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [796505809] [2022-12-14 13:12:25,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:12:25,705 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:12:25,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:12:25,706 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:12:25,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-12-14 13:12:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:12:25,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-14 13:12:25,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:12:25,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 13:12:26,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 13:12:27,116 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:12:27,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 13:12:27,511 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:12:27,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:12:28,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-12-14 13:12:28,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 13:12:35,726 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:12:35,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2022-12-14 13:12:35,961 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-12-14 13:12:35,962 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:12:36,610 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:12:36,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 48 [2022-12-14 13:12:36,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 52 [2022-12-14 13:12:39,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-12-14 13:12:39,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-12-14 13:12:41,738 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1261 (_ BitVec 32)) (|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1261) |c_#length|))) (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_92| (_ BitVec 32))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_92|) (_ bv0 32))) (.cse1 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_92|) (_ bv0 32)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| .cse2) .cse1))) (and (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_92| .cse0)) (= .cse1 (_ bv0 32)) (not (= .cse2 .cse0))))))) is different from true [2022-12-14 13:12:42,059 INFO L321 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2022-12-14 13:12:42,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-12-14 13:12:42,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:12:42,792 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-12-14 13:12:42,792 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:12:42,868 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 13:12:42,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 61 [2022-12-14 13:12:43,512 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:12:43,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 24 [2022-12-14 13:12:43,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:12:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-12-14 13:12:43,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:12:43,749 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1262 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1262) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_1262 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1263 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1262) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1263) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))))) is different from false [2022-12-14 13:12:44,104 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_ldv_malloc_#res.base_326| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_ldv_malloc_#res.base_326|) (_ bv0 1))) (forall ((v_ArrVal_1262 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1263 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1266 (_ BitVec 32))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1262) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (select (store |c_#length| |v_ldv_malloc_#res.base_326| v_ArrVal_1266) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1263) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))))) (or (forall ((|v_ldv_malloc_#res.base_326| (_ BitVec 32))) (not (= (select |c_#valid| |v_ldv_malloc_#res.base_326|) (_ bv0 1)))) (forall ((v_ArrVal_1262 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_alloc_10_#t~mem39#1.base| v_ArrVal_1262) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))))) is different from false [2022-12-14 13:12:44,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [796505809] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:12:44,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490656153] [2022-12-14 13:12:44,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:12:44,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:12:44,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:12:44,117 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:12:44,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c2d3b1-0038-4849-8372-cf3d208bf6cf/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-12-14 13:12:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:12:44,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-14 13:12:44,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:12:44,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 13:12:44,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 13:12:44,605 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:12:44,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 13:12:44,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:12:44,757 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:12:45,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 13:12:45,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-12-14 13:12:45,754 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-12-14 13:12:45,754 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:12:45,840 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 13:12:45,986 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 13:12:45,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 48 [2022-12-14 13:12:46,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 52 [2022-12-14 13:12:47,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-12-14 13:12:47,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-12-14 13:12:48,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:48,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:12:48,400 INFO L321 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2022-12-14 13:12:48,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-12-14 13:12:49,206 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-12-14 13:12:49,207 INFO L350 Elim1Store]: Elim1 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 107 treesize of output 88 [2022-12-14 13:12:49,303 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:12:49,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 57 [2022-12-14 13:12:50,291 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-12-14 13:12:50,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 31 [2022-12-14 13:12:50,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-12-14 13:12:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:12:50,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:12:57,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490656153] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:12:57,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:12:57,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 23] total 43 [2022-12-14 13:12:57,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996173031] [2022-12-14 13:12:57,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:12:57,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 13:12:57,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:12:57,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 13:12:57,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2009, Unknown=60, NotChecked=380, Total=2652 [2022-12-14 13:12:57,108 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 44 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 34 states have internal predecessors, (67), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-12-14 13:13:08,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0]