./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c --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_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/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_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/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_fb874c1a-6d8a-44ab-852e-39918750d248/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 0307f20ae0363cc6fed70ae0937c5000167639ab486b68a523e3313ccdd28e28 --- 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 09:54:28,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:54:28,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:54:28,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:54:28,765 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:54:28,766 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:54:28,767 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:54:28,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:54:28,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:54:28,769 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:54:28,770 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:54:28,771 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:54:28,771 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:54:28,772 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:54:28,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:54:28,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:54:28,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:54:28,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:54:28,776 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:54:28,777 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:54:28,778 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:54:28,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:54:28,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:54:28,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:54:28,785 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:54:28,785 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:54:28,785 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:54:28,786 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:54:28,786 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:54:28,787 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:54:28,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:54:28,788 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:54:28,789 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:54:28,790 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:54:28,791 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:54:28,791 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:54:28,792 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:54:28,792 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:54:28,792 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:54:28,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:54:28,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:54:28,794 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 09:54:28,816 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:54:28,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:54:28,816 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:54:28,824 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:54:28,824 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:54:28,825 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:54:28,825 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:54:28,825 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:54:28,825 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:54:28,825 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:54:28,826 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:54:28,826 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:54:28,826 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:54:28,826 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:54:28,826 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:54:28,827 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:54:28,827 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:54:28,827 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:54:28,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 09:54:28,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 09:54:28,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:54:28,828 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:54:28,828 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 09:54:28,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:54:28,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:54:28,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:54:28,829 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 09:54:28,829 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 09:54:28,830 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 09:54:28,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:54:28,830 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 09:54:28,830 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:54:28,830 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:54:28,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:54:28,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:54:28,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:54:28,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:54:28,832 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:54:28,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:54:28,832 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:54:28,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:54:28,832 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:54:28,832 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_fb874c1a-6d8a-44ab-852e-39918750d248/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0307f20ae0363cc6fed70ae0937c5000167639ab486b68a523e3313ccdd28e28 [2022-12-14 09:54:29,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:54:29,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:54:29,018 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:54:29,019 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:54:29,020 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:54:29,021 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2022-12-14 09:54:31,581 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:54:31,746 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:54:31,746 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2022-12-14 09:54:31,753 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/data/4100b2570/9fc5f415ef734ce2942932cf878ce88e/FLAGa1f8f4638 [2022-12-14 09:54:32,182 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/data/4100b2570/9fc5f415ef734ce2942932cf878ce88e [2022-12-14 09:54:32,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:54:32,188 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:54:32,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:54:32,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:54:32,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:54:32,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:54:32" (1/1) ... [2022-12-14 09:54:32,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b84ea60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:54:32, skipping insertion in model container [2022-12-14 09:54:32,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:54:32" (1/1) ... [2022-12-14 09:54:32,202 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:54:32,219 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:54:32,359 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2022-12-14 09:54:32,371 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:54:32,382 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 09:54:32,382 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@76fea8c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:54:32, skipping insertion in model container [2022-12-14 09:54:32,383 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:54:32,383 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 09:54:32,385 INFO L158 Benchmark]: Toolchain (without parser) took 196.20ms. Allocated memory is still 140.5MB. Free memory was 105.5MB in the beginning and 96.1MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 09:54:32,385 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 140.5MB. Free memory is still 110.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 09:54:32,386 INFO L158 Benchmark]: CACSL2BoogieTranslator took 193.16ms. Allocated memory is still 140.5MB. Free memory was 105.5MB in the beginning and 96.1MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 09:54:32,387 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 140.5MB. Free memory is still 110.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 193.16ms. Allocated memory is still 140.5MB. Free memory was 105.5MB in the beginning and 96.1MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 99]: 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_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/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_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/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_fb874c1a-6d8a-44ab-852e-39918750d248/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 0307f20ae0363cc6fed70ae0937c5000167639ab486b68a523e3313ccdd28e28 --- 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 09:54:33,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:54:33,929 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:54:33,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:54:33,976 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:54:33,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:54:33,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:54:33,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:54:33,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:54:33,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:54:33,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:54:33,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:54:33,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:54:33,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:54:33,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:54:33,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:54:33,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:54:33,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:54:33,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:54:33,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:54:33,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:54:33,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:54:33,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:54:33,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:54:34,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:54:34,000 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:54:34,001 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:54:34,002 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:54:34,002 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:54:34,003 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:54:34,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:54:34,004 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:54:34,004 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:54:34,005 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:54:34,006 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:54:34,006 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:54:34,007 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:54:34,007 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:54:34,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:54:34,008 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:54:34,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:54:34,009 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 09:54:34,030 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:54:34,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:54:34,030 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:54:34,030 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:54:34,031 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:54:34,031 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:54:34,031 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:54:34,031 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:54:34,031 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:54:34,031 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:54:34,032 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:54:34,032 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:54:34,032 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 09:54:34,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 09:54:34,032 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:54:34,032 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:54:34,032 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 09:54:34,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:54:34,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:54:34,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:54:34,033 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 09:54:34,033 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 09:54:34,033 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 09:54:34,033 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:54:34,033 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 09:54:34,033 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 09:54:34,033 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 09:54:34,034 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:54:34,034 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:54:34,034 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:54:34,034 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 09:54:34,034 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:54:34,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:54:34,034 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:54:34,034 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:54:34,035 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 09:54:34,035 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 09:54:34,035 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:54:34,035 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 09:54:34,035 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_fb874c1a-6d8a-44ab-852e-39918750d248/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0307f20ae0363cc6fed70ae0937c5000167639ab486b68a523e3313ccdd28e28 [2022-12-14 09:54:34,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:54:34,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:54:34,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:54:34,298 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:54:34,298 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:54:34,299 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2022-12-14 09:54:36,932 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:54:37,103 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:54:37,104 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2022-12-14 09:54:37,110 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/data/3a44f1cea/3debe1ca3dc742529c212d93ebf925d8/FLAG93119dcfd [2022-12-14 09:54:37,121 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/data/3a44f1cea/3debe1ca3dc742529c212d93ebf925d8 [2022-12-14 09:54:37,123 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:54:37,124 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:54:37,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:54:37,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:54:37,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:54:37,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:54:37" (1/1) ... [2022-12-14 09:54:37,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@414f2110 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:54:37, skipping insertion in model container [2022-12-14 09:54:37,130 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:54:37" (1/1) ... [2022-12-14 09:54:37,136 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:54:37,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:54:37,275 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2022-12-14 09:54:37,282 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:54:37,293 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 09:54:37,296 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:54:37,305 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2022-12-14 09:54:37,307 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:54:37,312 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:54:37,326 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2022-12-14 09:54:37,329 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:54:37,340 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:54:37,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:54:37 WrapperNode [2022-12-14 09:54:37,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:54:37,342 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:54:37,342 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:54:37,342 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:54:37,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:54:37" (1/1) ... [2022-12-14 09:54:37,355 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:54:37" (1/1) ... [2022-12-14 09:54:37,370 INFO L138 Inliner]: procedures = 27, calls = 34, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 99 [2022-12-14 09:54:37,370 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:54:37,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:54:37,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:54:37,371 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:54:37,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:54:37" (1/1) ... [2022-12-14 09:54:37,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:54:37" (1/1) ... [2022-12-14 09:54:37,380 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:54:37" (1/1) ... [2022-12-14 09:54:37,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:54:37" (1/1) ... [2022-12-14 09:54:37,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:54:37" (1/1) ... [2022-12-14 09:54:37,389 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:54:37" (1/1) ... [2022-12-14 09:54:37,391 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:54:37" (1/1) ... [2022-12-14 09:54:37,392 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:54:37" (1/1) ... [2022-12-14 09:54:37,394 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:54:37,395 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:54:37,395 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:54:37,395 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:54:37,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:54:37" (1/1) ... [2022-12-14 09:54:37,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:54:37,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:54:37,419 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:54:37,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:54:37,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:54:37,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 09:54:37,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 09:54:37,463 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 09:54:37,463 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 09:54:37,464 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 09:54:37,464 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 09:54:37,464 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 09:54:37,464 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-14 09:54:37,464 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-14 09:54:37,464 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 09:54:37,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:54:37,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:54:37,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 09:54:37,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 09:54:37,466 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 09:54:37,559 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:54:37,561 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:54:37,955 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:54:37,965 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:54:37,965 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 09:54:37,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:54:37 BoogieIcfgContainer [2022-12-14 09:54:37,966 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:54:37,968 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:54:37,968 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:54:37,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:54:37,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:54:37" (1/3) ... [2022-12-14 09:54:37,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a178a10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:54:37, skipping insertion in model container [2022-12-14 09:54:37,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:54:37" (2/3) ... [2022-12-14 09:54:37,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a178a10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:54:37, skipping insertion in model container [2022-12-14 09:54:37,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:54:37" (3/3) ... [2022-12-14 09:54:37,972 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sum-array-hom.wvr.c [2022-12-14 09:54:37,986 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:54:37,986 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-12-14 09:54:37,986 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 09:54:38,056 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-14 09:54:38,090 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 09:54:38,105 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 181 transitions, 386 flow [2022-12-14 09:54:38,108 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 181 transitions, 386 flow [2022-12-14 09:54:38,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 181 transitions, 386 flow [2022-12-14 09:54:38,182 INFO L130 PetriNetUnfolder]: 12/178 cut-off events. [2022-12-14 09:54:38,182 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-14 09:54:38,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 178 events. 12/178 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 195 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 127. Up to 2 conditions per place. [2022-12-14 09:54:38,189 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2022-12-14 09:54:56,011 INFO L134 LiptonReduction]: Checked pairs total: 3342 [2022-12-14 09:54:56,011 INFO L136 LiptonReduction]: Total number of compositions: 179 [2022-12-14 09:54:56,018 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 49 transitions, 122 flow [2022-12-14 09:54:56,074 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 750 states, 616 states have (on average 4.165584415584416) internal successors, (2566), 749 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:56,089 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:54:56,094 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;@7574646e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:54:56,095 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2022-12-14 09:54:56,097 INFO L276 IsEmpty]: Start isEmpty. Operand has 750 states, 616 states have (on average 4.165584415584416) internal successors, (2566), 749 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:56,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 09:54:56,101 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:54:56,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 09:54:56,102 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 09:54:56,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:54:56,105 INFO L85 PathProgramCache]: Analyzing trace with hash 21330, now seen corresponding path program 1 times [2022-12-14 09:54:56,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:54:56,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1958137380] [2022-12-14 09:54:56,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:56,115 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 09:54:56,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:54:56,116 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:54:56,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:54:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:56,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:54:56,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:54:56,302 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 09:54:56,303 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 09:54:56,326 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 09:54:56,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:54:56,327 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:54:56,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1958137380] [2022-12-14 09:54:56,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1958137380] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:54:56,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:54:56,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:54:56,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3266842] [2022-12-14 09:54:56,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:54:56,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:54:56,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:54:56,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:54:56,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:54:56,352 INFO L87 Difference]: Start difference. First operand has 750 states, 616 states have (on average 4.165584415584416) internal successors, (2566), 749 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:56,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:54:56,518 INFO L93 Difference]: Finished difference Result 748 states and 2564 transitions. [2022-12-14 09:54:56,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:54:56,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-12-14 09:54:56,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:54:56,532 INFO L225 Difference]: With dead ends: 748 [2022-12-14 09:54:56,533 INFO L226 Difference]: Without dead ends: 748 [2022-12-14 09:54:56,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:54:56,535 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:54:56,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 3 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:54:56,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-12-14 09:54:56,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 748. [2022-12-14 09:54:56,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 616 states have (on average 4.162337662337662) internal successors, (2564), 747 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:56,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2564 transitions. [2022-12-14 09:54:56,591 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2564 transitions. Word has length 2 [2022-12-14 09:54:56,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:54:56,592 INFO L495 AbstractCegarLoop]: Abstraction has 748 states and 2564 transitions. [2022-12-14 09:54:56,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:56,592 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2564 transitions. [2022-12-14 09:54:56,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 09:54:56,592 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:54:56,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 09:54:56,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:54:56,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:54:56,795 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 09:54:56,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:54:56,796 INFO L85 PathProgramCache]: Analyzing trace with hash 21331, now seen corresponding path program 1 times [2022-12-14 09:54:56,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:54:56,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [343262051] [2022-12-14 09:54:56,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:56,799 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 09:54:56,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:54:56,802 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:54:56,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:54:56,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:56,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 09:54:56,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:54:56,996 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:54:56,996 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:54:57,023 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 09:54:57,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:54:57,024 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:54:57,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [343262051] [2022-12-14 09:54:57,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [343262051] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:54:57,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:54:57,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:54:57,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082071298] [2022-12-14 09:54:57,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:54:57,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:54:57,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:54:57,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:54:57,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:54:57,026 INFO L87 Difference]: Start difference. First operand 748 states and 2564 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:57,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:54:57,298 INFO L93 Difference]: Finished difference Result 1494 states and 5126 transitions. [2022-12-14 09:54:57,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:54:57,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-12-14 09:54:57,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:54:57,310 INFO L225 Difference]: With dead ends: 1494 [2022-12-14 09:54:57,310 INFO L226 Difference]: Without dead ends: 1494 [2022-12-14 09:54:57,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:54:57,311 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:54:57,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 6 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:54:57,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2022-12-14 09:54:57,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 749. [2022-12-14 09:54:57,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 617 states have (on average 4.162074554294976) internal successors, (2568), 748 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:57,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2568 transitions. [2022-12-14 09:54:57,338 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2568 transitions. Word has length 2 [2022-12-14 09:54:57,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:54:57,338 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2568 transitions. [2022-12-14 09:54:57,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:57,338 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2568 transitions. [2022-12-14 09:54:57,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 09:54:57,338 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:54:57,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 09:54:57,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:54:57,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:54:57,541 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 09:54:57,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:54:57,542 INFO L85 PathProgramCache]: Analyzing trace with hash 21438, now seen corresponding path program 1 times [2022-12-14 09:54:57,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:54:57,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [355168848] [2022-12-14 09:54:57,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:57,545 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:54:57,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:54:57,548 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:54:57,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:54:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:57,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 09:54:57,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:54:57,740 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2022-12-14 09:54:57,740 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 6 case distinctions, treesize of input 38 treesize of output 51 [2022-12-14 09:54:57,777 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 09:54:57,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:54:57,777 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:54:57,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [355168848] [2022-12-14 09:54:57,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [355168848] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:54:57,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:54:57,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:54:57,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69980765] [2022-12-14 09:54:57,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:54:57,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:54:57,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:54:57,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:54:57,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:54:57,779 INFO L87 Difference]: Start difference. First operand 749 states and 2568 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:57,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:54:57,921 INFO L93 Difference]: Finished difference Result 623 states and 2066 transitions. [2022-12-14 09:54:57,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:54:57,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-12-14 09:54:57,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:54:57,928 INFO L225 Difference]: With dead ends: 623 [2022-12-14 09:54:57,928 INFO L226 Difference]: Without dead ends: 623 [2022-12-14 09:54:57,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:54:57,929 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:54:57,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 3 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:54:57,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-12-14 09:54:57,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 623. [2022-12-14 09:54:57,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 519 states have (on average 3.980732177263969) internal successors, (2066), 622 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:57,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 2066 transitions. [2022-12-14 09:54:57,944 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 2066 transitions. Word has length 2 [2022-12-14 09:54:57,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:54:57,944 INFO L495 AbstractCegarLoop]: Abstraction has 623 states and 2066 transitions. [2022-12-14 09:54:57,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:57,945 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 2066 transitions. [2022-12-14 09:54:57,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 09:54:57,945 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:54:57,945 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 09:54:57,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 09:54:58,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:54:58,147 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 09:54:58,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:54:58,148 INFO L85 PathProgramCache]: Analyzing trace with hash 21440, now seen corresponding path program 1 times [2022-12-14 09:54:58,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:54:58,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561911612] [2022-12-14 09:54:58,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:58,149 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 09:54:58,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:54:58,151 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:54:58,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-14 09:54:58,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:58,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 09:54:58,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:54:58,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:58,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:58,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:54:58,451 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-14 09:54:58,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-12-14 09:54:58,479 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 09:54:58,479 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 44 treesize of output 45 [2022-12-14 09:54:58,532 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 09:54:58,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:54:58,532 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:54:58,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561911612] [2022-12-14 09:54:58,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [561911612] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:54:58,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:54:58,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:54:58,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957417257] [2022-12-14 09:54:58,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:54:58,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:54:58,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:54:58,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:54:58,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:54:58,534 INFO L87 Difference]: Start difference. First operand 623 states and 2066 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:58,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:54:58,694 INFO L93 Difference]: Finished difference Result 497 states and 1564 transitions. [2022-12-14 09:54:58,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:54:58,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-12-14 09:54:58,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:54:58,697 INFO L225 Difference]: With dead ends: 497 [2022-12-14 09:54:58,697 INFO L226 Difference]: Without dead ends: 497 [2022-12-14 09:54:58,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:54:58,698 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:54:58,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 3 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:54:58,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-12-14 09:54:58,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 497. [2022-12-14 09:54:58,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 421 states have (on average 3.7149643705463182) internal successors, (1564), 496 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:58,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1564 transitions. [2022-12-14 09:54:58,711 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1564 transitions. Word has length 2 [2022-12-14 09:54:58,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:54:58,711 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 1564 transitions. [2022-12-14 09:54:58,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:54:58,711 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1564 transitions. [2022-12-14 09:54:58,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 09:54:58,711 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:54:58,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 09:54:58,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-14 09:54:58,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:54:58,912 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 09:54:58,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:54:58,913 INFO L85 PathProgramCache]: Analyzing trace with hash 663930, now seen corresponding path program 1 times [2022-12-14 09:54:58,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:54:58,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875449328] [2022-12-14 09:54:58,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:58,913 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 09:54:58,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:54:58,914 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:54:58,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-14 09:54:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:58,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 09:54:58,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:54:59,070 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:54:59,070 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:54:59,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:59,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:54:59,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:59,319 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:54:59,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875449328] [2022-12-14 09:54:59,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875449328] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:54:59,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [815325126] [2022-12-14 09:54:59,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:59,319 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:54:59,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:54:59,320 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:54:59,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-12-14 09:54:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:59,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 09:54:59,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:54:59,496 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:54:59,497 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:54:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:59,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:54:59,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:59,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [815325126] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:54:59,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612094862] [2022-12-14 09:54:59,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:54:59,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:54:59,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:54:59,577 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:54:59,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 09:54:59,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:54:59,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 09:54:59,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:54:59,725 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:54:59,725 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:54:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:59,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:54:59,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:54:59,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612094862] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:54:59,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:54:59,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-12-14 09:54:59,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772046961] [2022-12-14 09:54:59,877 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:54:59,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:54:59,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:54:59,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:54:59,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:54:59,878 INFO L87 Difference]: Start difference. First operand 497 states and 1564 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:00,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:55:00,984 INFO L93 Difference]: Finished difference Result 1979 states and 6244 transitions. [2022-12-14 09:55:00,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:55:00,986 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 09:55:00,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:55:00,997 INFO L225 Difference]: With dead ends: 1979 [2022-12-14 09:55:00,997 INFO L226 Difference]: Without dead ends: 1979 [2022-12-14 09:55:00,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-14 09:55:00,998 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 359 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 09:55:00,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 15 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 09:55:01,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2022-12-14 09:55:01,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 500. [2022-12-14 09:55:01,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 424 states have (on average 3.702830188679245) internal successors, (1570), 499 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:01,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1570 transitions. [2022-12-14 09:55:01,026 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1570 transitions. Word has length 3 [2022-12-14 09:55:01,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:55:01,027 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 1570 transitions. [2022-12-14 09:55:01,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:01,027 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1570 transitions. [2022-12-14 09:55:01,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 09:55:01,027 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:55:01,027 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 09:55:01,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2022-12-14 09:55:01,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 09:55:01,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-12-14 09:55:01,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:01,630 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 09:55:01,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:55:01,631 INFO L85 PathProgramCache]: Analyzing trace with hash 20617611, now seen corresponding path program 1 times [2022-12-14 09:55:01,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:55:01,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1379889881] [2022-12-14 09:55:01,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:01,633 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 09:55:01,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:55:01,636 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:01,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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)] Waiting until timeout for monitored process [2022-12-14 09:55:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:01,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 09:55:01,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:01,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:01,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:01,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:01,799 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-14 09:55:01,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-12-14 09:55:01,811 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 14 treesize of output 12 [2022-12-14 09:55:01,858 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 09:55:01,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:55:01,858 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:55:01,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1379889881] [2022-12-14 09:55:01,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1379889881] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:55:01,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:55:01,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:55:01,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763523355] [2022-12-14 09:55:01,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:55:01,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:55:01,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:55:01,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:55:01,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:55:01,860 INFO L87 Difference]: Start difference. First operand 500 states and 1570 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:01,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:55:01,982 INFO L93 Difference]: Finished difference Result 470 states and 1485 transitions. [2022-12-14 09:55:01,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:55:01,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 09:55:01,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:55:01,987 INFO L225 Difference]: With dead ends: 470 [2022-12-14 09:55:01,987 INFO L226 Difference]: Without dead ends: 470 [2022-12-14 09:55:01,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:55:01,988 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:55:01,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 3 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:55:01,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-12-14 09:55:02,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 470. [2022-12-14 09:55:02,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 406 states have (on average 3.6576354679802954) internal successors, (1485), 469 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:02,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1485 transitions. [2022-12-14 09:55:02,003 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1485 transitions. Word has length 4 [2022-12-14 09:55:02,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:55:02,003 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 1485 transitions. [2022-12-14 09:55:02,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:02,004 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1485 transitions. [2022-12-14 09:55:02,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 09:55:02,004 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:55:02,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 09:55:02,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 09:55:02,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:02,206 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 09:55:02,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:55:02,207 INFO L85 PathProgramCache]: Analyzing trace with hash 20617612, now seen corresponding path program 1 times [2022-12-14 09:55:02,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:55:02,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976440564] [2022-12-14 09:55:02,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:02,208 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 09:55:02,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:55:02,211 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:02,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:02,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:02,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 09:55:02,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:02,368 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2022-12-14 09:55:02,368 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 4 case distinctions, treesize of input 29 treesize of output 44 [2022-12-14 09:55:02,388 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 09:55:02,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:55:02,388 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:55:02,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976440564] [2022-12-14 09:55:02,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976440564] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:55:02,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:55:02,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:55:02,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73002623] [2022-12-14 09:55:02,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:55:02,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:55:02,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:55:02,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:55:02,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:55:02,389 INFO L87 Difference]: Start difference. First operand 470 states and 1485 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:02,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:55:02,482 INFO L93 Difference]: Finished difference Result 440 states and 1400 transitions. [2022-12-14 09:55:02,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:55:02,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 09:55:02,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:55:02,484 INFO L225 Difference]: With dead ends: 440 [2022-12-14 09:55:02,484 INFO L226 Difference]: Without dead ends: 440 [2022-12-14 09:55:02,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:55:02,485 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 32 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:55:02,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 3 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:55:02,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-12-14 09:55:02,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2022-12-14 09:55:02,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 388 states have (on average 3.6082474226804124) internal successors, (1400), 439 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:02,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1400 transitions. [2022-12-14 09:55:02,492 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1400 transitions. Word has length 4 [2022-12-14 09:55:02,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:55:02,492 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 1400 transitions. [2022-12-14 09:55:02,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:02,492 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1400 transitions. [2022-12-14 09:55:02,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 09:55:02,492 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:55:02,492 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 09:55:02,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:02,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:02,694 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 09:55:02,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:55:02,695 INFO L85 PathProgramCache]: Analyzing trace with hash 639140683, now seen corresponding path program 1 times [2022-12-14 09:55:02,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:55:02,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [257832153] [2022-12-14 09:55:02,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:02,696 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 09:55:02,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:55:02,699 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:02,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:02,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:02,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 09:55:02,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:02,884 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 09:55:02,884 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 09:55:02,902 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 09:55:02,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:55:02,902 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:55:02,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [257832153] [2022-12-14 09:55:02,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [257832153] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:55:02,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:55:02,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:55:02,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632716700] [2022-12-14 09:55:02,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:55:02,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:55:02,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:55:02,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:55:02,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:55:02,903 INFO L87 Difference]: Start difference. First operand 440 states and 1400 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:03,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:55:03,020 INFO L93 Difference]: Finished difference Result 258 states and 799 transitions. [2022-12-14 09:55:03,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:55:03,021 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 09:55:03,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:55:03,023 INFO L225 Difference]: With dead ends: 258 [2022-12-14 09:55:03,023 INFO L226 Difference]: Without dead ends: 258 [2022-12-14 09:55:03,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 09:55:03,024 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:55:03,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 3 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:55:03,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-12-14 09:55:03,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2022-12-14 09:55:03,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 237 states have (on average 3.371308016877637) internal successors, (799), 257 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:03,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 799 transitions. [2022-12-14 09:55:03,033 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 799 transitions. Word has length 5 [2022-12-14 09:55:03,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:55:03,033 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 799 transitions. [2022-12-14 09:55:03,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:03,034 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 799 transitions. [2022-12-14 09:55:03,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 09:55:03,034 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:55:03,034 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 09:55:03,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:03,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:03,236 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 09:55:03,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:55:03,237 INFO L85 PathProgramCache]: Analyzing trace with hash 639140684, now seen corresponding path program 1 times [2022-12-14 09:55:03,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:55:03,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1118477870] [2022-12-14 09:55:03,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:03,238 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 09:55:03,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:55:03,241 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:03,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:03,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 09:55:03,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:03,506 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:55:03,506 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:55:03,579 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 09:55:03,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:55:03,580 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:55:03,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1118477870] [2022-12-14 09:55:03,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1118477870] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:55:03,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:55:03,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:55:03,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868871324] [2022-12-14 09:55:03,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:55:03,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:55:03,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:55:03,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:55:03,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:55:03,581 INFO L87 Difference]: Start difference. First operand 258 states and 799 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:03,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:55:03,824 INFO L93 Difference]: Finished difference Result 408 states and 1257 transitions. [2022-12-14 09:55:03,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:55:03,825 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 09:55:03,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:55:03,828 INFO L225 Difference]: With dead ends: 408 [2022-12-14 09:55:03,828 INFO L226 Difference]: Without dead ends: 408 [2022-12-14 09:55:03,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:55:03,828 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 101 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:55:03,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 7 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:55:03,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-12-14 09:55:03,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 308. [2022-12-14 09:55:03,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 287 states have (on average 3.529616724738676) internal successors, (1013), 307 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:03,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 1013 transitions. [2022-12-14 09:55:03,834 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 1013 transitions. Word has length 5 [2022-12-14 09:55:03,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:55:03,834 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 1013 transitions. [2022-12-14 09:55:03,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:03,834 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 1013 transitions. [2022-12-14 09:55:03,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 09:55:03,834 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:55:03,834 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 09:55:03,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-14 09:55:04,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:04,036 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 09:55:04,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:55:04,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1693047533, now seen corresponding path program 2 times [2022-12-14 09:55:04,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:55:04,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [378920059] [2022-12-14 09:55:04,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:55:04,039 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 09:55:04,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:55:04,041 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:04,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-14 09:55:04,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 09:55:04,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:55:04,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 09:55:04,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:04,291 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:55:04,291 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:55:04,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:04,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:55:05,239 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:05,240 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:55:05,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [378920059] [2022-12-14 09:55:05,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [378920059] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:55:05,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1956288654] [2022-12-14 09:55:05,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:55:05,240 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:55:05,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:55:05,241 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:55:05,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-12-14 09:55:05,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 09:55:05,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:55:05,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 09:55:05,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:05,477 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:55:05,477 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:55:05,541 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:05,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:55:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:05,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1956288654] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:55:05,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59321011] [2022-12-14 09:55:05,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:55:05,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:55:05,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:55:05,688 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:55:05,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 09:55:05,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 09:55:05,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:55:05,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 09:55:05,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:05,856 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:55:05,857 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:55:05,902 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:05,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:55:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:06,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59321011] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:55:06,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:55:06,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2022-12-14 09:55:06,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415396119] [2022-12-14 09:55:06,060 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:55:06,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 09:55:06,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:55:06,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 09:55:06,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-14 09:55:06,061 INFO L87 Difference]: Start difference. First operand 308 states and 1013 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:10,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:55:10,344 INFO L93 Difference]: Finished difference Result 3023 states and 10034 transitions. [2022-12-14 09:55:10,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 09:55:10,346 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 09:55:10,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:55:10,363 INFO L225 Difference]: With dead ends: 3023 [2022-12-14 09:55:10,363 INFO L226 Difference]: Without dead ends: 3023 [2022-12-14 09:55:10,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-12-14 09:55:10,364 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1160 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1160 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:55:10,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1160 Valid, 87 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-12-14 09:55:10,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3023 states. [2022-12-14 09:55:10,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3023 to 314. [2022-12-14 09:55:10,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 293 states have (on average 3.4982935153583616) internal successors, (1025), 313 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:10,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 1025 transitions. [2022-12-14 09:55:10,387 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 1025 transitions. Word has length 6 [2022-12-14 09:55:10,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:55:10,387 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 1025 transitions. [2022-12-14 09:55:10,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:10,387 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 1025 transitions. [2022-12-14 09:55:10,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 09:55:10,388 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:55:10,388 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 09:55:10,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 09:55:10,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-12-14 09:55:10,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2022-12-14 09:55:10,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 09:55:10,989 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 09:55:10,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:55:10,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1661298587, now seen corresponding path program 1 times [2022-12-14 09:55:10,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:55:10,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347253670] [2022-12-14 09:55:10,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:10,992 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 09:55:10,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:55:10,995 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:10,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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)] Waiting until timeout for monitored process [2022-12-14 09:55:11,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:11,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 09:55:11,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:11,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:55:11,165 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-12-14 09:55:11,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-12-14 09:55:11,183 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 120 treesize of output 116 [2022-12-14 09:55:11,233 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 09:55:11,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:55:11,233 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:55:11,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347253670] [2022-12-14 09:55:11,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347253670] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:55:11,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:55:11,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:55:11,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168079632] [2022-12-14 09:55:11,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:55:11,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:55:11,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:55:11,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:55:11,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:55:11,235 INFO L87 Difference]: Start difference. First operand 314 states and 1025 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:11,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:55:11,343 INFO L93 Difference]: Finished difference Result 290 states and 953 transitions. [2022-12-14 09:55:11,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:55:11,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 09:55:11,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:55:11,345 INFO L225 Difference]: With dead ends: 290 [2022-12-14 09:55:11,346 INFO L226 Difference]: Without dead ends: 290 [2022-12-14 09:55:11,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:55:11,346 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:55:11,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 3 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:55:11,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-12-14 09:55:11,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2022-12-14 09:55:11,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 275 states have (on average 3.4654545454545453) internal successors, (953), 289 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:11,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 953 transitions. [2022-12-14 09:55:11,351 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 953 transitions. Word has length 6 [2022-12-14 09:55:11,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:55:11,351 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 953 transitions. [2022-12-14 09:55:11,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:11,351 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 953 transitions. [2022-12-14 09:55:11,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 09:55:11,351 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:55:11,352 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 09:55:11,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 09:55:11,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:11,553 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 09:55:11,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:55:11,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1661298585, now seen corresponding path program 1 times [2022-12-14 09:55:11,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:55:11,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1821848199] [2022-12-14 09:55:11,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:11,555 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 09:55:11,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:55:11,558 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:11,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-14 09:55:11,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:11,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 09:55:11,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:11,701 INFO L321 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2022-12-14 09:55:11,701 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 3 case distinctions, treesize of input 15 treesize of output 46 [2022-12-14 09:55:11,719 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 09:55:11,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:55:11,719 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:55:11,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1821848199] [2022-12-14 09:55:11,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1821848199] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:55:11,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:55:11,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:55:11,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853335646] [2022-12-14 09:55:11,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:55:11,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:55:11,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:55:11,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:55:11,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:55:11,721 INFO L87 Difference]: Start difference. First operand 290 states and 953 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:11,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:55:11,828 INFO L93 Difference]: Finished difference Result 266 states and 881 transitions. [2022-12-14 09:55:11,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:55:11,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 09:55:11,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:55:11,830 INFO L225 Difference]: With dead ends: 266 [2022-12-14 09:55:11,830 INFO L226 Difference]: Without dead ends: 266 [2022-12-14 09:55:11,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:55:11,830 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:55:11,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 3 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:55:11,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-12-14 09:55:11,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2022-12-14 09:55:11,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 257 states have (on average 3.4280155642023344) internal successors, (881), 265 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:11,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 881 transitions. [2022-12-14 09:55:11,835 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 881 transitions. Word has length 6 [2022-12-14 09:55:11,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:55:11,835 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 881 transitions. [2022-12-14 09:55:11,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:11,835 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 881 transitions. [2022-12-14 09:55:11,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 09:55:11,835 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:55:11,836 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 09:55:11,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-14 09:55:12,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:12,037 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 09:55:12,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:55:12,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1661470241, now seen corresponding path program 1 times [2022-12-14 09:55:12,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:55:12,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [328180302] [2022-12-14 09:55:12,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:12,040 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 09:55:12,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:55:12,043 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:12,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:12,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:12,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 09:55:12,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:12,199 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:55:12,199 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:55:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:12,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:55:12,282 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:55:12,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [328180302] [2022-12-14 09:55:12,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [328180302] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:55:12,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:55:12,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:55:12,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687221999] [2022-12-14 09:55:12,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:55:12,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:55:12,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:55:12,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:55:12,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:55:12,283 INFO L87 Difference]: Start difference. First operand 266 states and 881 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:12,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:55:12,638 INFO L93 Difference]: Finished difference Result 435 states and 1302 transitions. [2022-12-14 09:55:12,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:55:12,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 09:55:12,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:55:12,640 INFO L225 Difference]: With dead ends: 435 [2022-12-14 09:55:12,641 INFO L226 Difference]: Without dead ends: 435 [2022-12-14 09:55:12,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:55:12,641 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 57 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:55:12,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 13 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:55:12,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-12-14 09:55:12,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 413. [2022-12-14 09:55:12,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 404 states have (on average 3.1782178217821784) internal successors, (1284), 412 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:12,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1284 transitions. [2022-12-14 09:55:12,648 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1284 transitions. Word has length 6 [2022-12-14 09:55:12,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:55:12,648 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 1284 transitions. [2022-12-14 09:55:12,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:12,648 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1284 transitions. [2022-12-14 09:55:12,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 09:55:12,649 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:55:12,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:55:12,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-14 09:55:12,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:12,850 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 09:55:12,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:55:12,851 INFO L85 PathProgramCache]: Analyzing trace with hash -913286010, now seen corresponding path program 1 times [2022-12-14 09:55:12,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:55:12,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974209265] [2022-12-14 09:55:12,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:12,853 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 09:55:12,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:55:12,856 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:12,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-14 09:55:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:12,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 09:55:12,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:13,040 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:55:13,040 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:55:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:55:13,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:55:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:55:13,488 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:55:13,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1974209265] [2022-12-14 09:55:13,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1974209265] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:55:13,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [772433001] [2022-12-14 09:55:13,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:13,489 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:55:13,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:55:13,490 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:55:13,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-12-14 09:55:13,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:13,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 09:55:13,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:13,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:13,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:55:13,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:13,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [772433001] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:55:13,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957696410] [2022-12-14 09:55:13,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:13,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:55:13,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:55:13,932 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:55:13,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 09:55:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:14,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 09:55:14,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:14,080 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:55:14,080 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:55:14,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:55:14,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:55:14,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:55:14,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957696410] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:55:14,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:55:14,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 4, 4] total 20 [2022-12-14 09:55:14,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553029025] [2022-12-14 09:55:14,375 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:55:14,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 09:55:14,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:55:14,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 09:55:14,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-12-14 09:55:14,376 INFO L87 Difference]: Start difference. First operand 413 states and 1284 transitions. Second operand has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:18,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:55:18,342 INFO L93 Difference]: Finished difference Result 1024 states and 3081 transitions. [2022-12-14 09:55:18,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 09:55:18,344 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 09:55:18,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:55:18,347 INFO L225 Difference]: With dead ends: 1024 [2022-12-14 09:55:18,347 INFO L226 Difference]: Without dead ends: 1024 [2022-12-14 09:55:18,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=376, Invalid=1184, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 09:55:18,347 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 871 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:55:18,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [871 Valid, 115 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 09:55:18,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2022-12-14 09:55:18,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 658. [2022-12-14 09:55:18,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 649 states have (on average 3.4499229583975346) internal successors, (2239), 657 states have internal predecessors, (2239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:18,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2239 transitions. [2022-12-14 09:55:18,359 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2239 transitions. Word has length 7 [2022-12-14 09:55:18,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:55:18,359 INFO L495 AbstractCegarLoop]: Abstraction has 658 states and 2239 transitions. [2022-12-14 09:55:18,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:18,360 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2239 transitions. [2022-12-14 09:55:18,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 09:55:18,360 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:55:18,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:55:18,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 09:55:18,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-12-14 09:55:18,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-14 09:55:18,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:18,962 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 09:55:18,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:55:18,963 INFO L85 PathProgramCache]: Analyzing trace with hash 39346166, now seen corresponding path program 1 times [2022-12-14 09:55:18,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:55:18,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [152433416] [2022-12-14 09:55:18,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:18,964 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 09:55:18,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:55:18,967 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:18,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-14 09:55:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:19,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 09:55:19,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:19,127 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:55:19,127 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:55:19,248 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 09:55:19,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:55:19,248 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:55:19,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [152433416] [2022-12-14 09:55:19,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [152433416] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:55:19,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:55:19,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:55:19,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758118758] [2022-12-14 09:55:19,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:55:19,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:55:19,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:55:19,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:55:19,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:55:19,250 INFO L87 Difference]: Start difference. First operand 658 states and 2239 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:19,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:55:19,562 INFO L93 Difference]: Finished difference Result 920 states and 3149 transitions. [2022-12-14 09:55:19,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:55:19,563 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 09:55:19,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:55:19,566 INFO L225 Difference]: With dead ends: 920 [2022-12-14 09:55:19,566 INFO L226 Difference]: Without dead ends: 920 [2022-12-14 09:55:19,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:55:19,566 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 77 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:55:19,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 4 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:55:19,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-12-14 09:55:19,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 778. [2022-12-14 09:55:19,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 769 states have (on average 3.6163849154746424) internal successors, (2781), 777 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:19,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 2781 transitions. [2022-12-14 09:55:19,585 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 2781 transitions. Word has length 7 [2022-12-14 09:55:19,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:55:19,586 INFO L495 AbstractCegarLoop]: Abstraction has 778 states and 2781 transitions. [2022-12-14 09:55:19,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:19,586 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 2781 transitions. [2022-12-14 09:55:19,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 09:55:19,587 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:55:19,587 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:55:19,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-14 09:55:19,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:19,788 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 09:55:19,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:55:19,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1329724790, now seen corresponding path program 1 times [2022-12-14 09:55:19,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:55:19,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1258553239] [2022-12-14 09:55:19,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:19,790 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 09:55:19,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:55:19,793 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:19,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-14 09:55:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:20,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 09:55:20,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:20,126 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:55:20,127 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:55:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:55:20,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:55:20,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:55:20,649 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:55:20,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1258553239] [2022-12-14 09:55:20,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1258553239] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:55:20,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1674888437] [2022-12-14 09:55:20,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:20,649 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:55:20,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:55:20,650 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:55:20,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-12-14 09:55:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:20,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 09:55:20,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:21,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:21,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:55:21,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:21,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1674888437] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:55:21,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932409350] [2022-12-14 09:55:21,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:21,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:55:21,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:55:21,278 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:55:21,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 09:55:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:21,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 09:55:21,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:21,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:21,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:55:21,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:21,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932409350] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:55:21,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:55:21,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 20 [2022-12-14 09:55:21,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767452577] [2022-12-14 09:55:21,567 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:55:21,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 09:55:21,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:55:21,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 09:55:21,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-12-14 09:55:21,568 INFO L87 Difference]: Start difference. First operand 778 states and 2781 transitions. Second operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:29,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:55:29,135 INFO L93 Difference]: Finished difference Result 1502 states and 5115 transitions. [2022-12-14 09:55:29,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 09:55:29,136 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 09:55:29,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:55:29,147 INFO L225 Difference]: With dead ends: 1502 [2022-12-14 09:55:29,147 INFO L226 Difference]: Without dead ends: 1502 [2022-12-14 09:55:29,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=368, Invalid=1192, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 09:55:29,148 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 762 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:55:29,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [762 Valid, 60 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 09:55:29,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2022-12-14 09:55:29,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1056. [2022-12-14 09:55:29,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1047 states have (on average 3.8787010506208213) internal successors, (4061), 1055 states have internal predecessors, (4061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:29,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 4061 transitions. [2022-12-14 09:55:29,167 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 4061 transitions. Word has length 9 [2022-12-14 09:55:29,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:55:29,167 INFO L495 AbstractCegarLoop]: Abstraction has 1056 states and 4061 transitions. [2022-12-14 09:55:29,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:29,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 4061 transitions. [2022-12-14 09:55:29,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 09:55:29,167 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:55:29,167 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:55:29,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-12-14 09:55:29,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 09:55:29,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2022-12-14 09:55:29,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 09:55:29,770 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 09:55:29,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:55:29,771 INFO L85 PathProgramCache]: Analyzing trace with hash -837569507, now seen corresponding path program 1 times [2022-12-14 09:55:29,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:55:29,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [814789420] [2022-12-14 09:55:29,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:29,774 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 09:55:29,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:55:29,775 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:29,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-12-14 09:55:29,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:29,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 09:55:29,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:29,936 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 09:55:29,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:55:29,936 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:55:29,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [814789420] [2022-12-14 09:55:29,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [814789420] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:55:29,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:55:29,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:55:29,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550996849] [2022-12-14 09:55:29,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:55:29,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:55:29,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:55:29,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:55:29,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:55:29,937 INFO L87 Difference]: Start difference. First operand 1056 states and 4061 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:30,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:55:30,238 INFO L93 Difference]: Finished difference Result 1104 states and 4138 transitions. [2022-12-14 09:55:30,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:55:30,238 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 09:55:30,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:55:30,242 INFO L225 Difference]: With dead ends: 1104 [2022-12-14 09:55:30,242 INFO L226 Difference]: Without dead ends: 1104 [2022-12-14 09:55:30,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:55:30,242 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 44 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:55:30,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 11 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:55:30,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2022-12-14 09:55:30,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1084. [2022-12-14 09:55:30,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1075 states have (on average 3.822325581395349) internal successors, (4109), 1083 states have internal predecessors, (4109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:30,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 4109 transitions. [2022-12-14 09:55:30,259 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 4109 transitions. Word has length 9 [2022-12-14 09:55:30,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:55:30,259 INFO L495 AbstractCegarLoop]: Abstraction has 1084 states and 4109 transitions. [2022-12-14 09:55:30,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:30,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 4109 transitions. [2022-12-14 09:55:30,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 09:55:30,260 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:55:30,260 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:55:30,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-12-14 09:55:30,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:30,460 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 09:55:30,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:55:30,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1733557270, now seen corresponding path program 1 times [2022-12-14 09:55:30,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:55:30,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574479030] [2022-12-14 09:55:30,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:30,461 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 09:55:30,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:55:30,463 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:30,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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)] Waiting until timeout for monitored process [2022-12-14 09:55:30,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:30,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 09:55:30,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:30,802 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:55:30,802 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:55:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:31,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:55:31,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:31,945 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:55:31,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574479030] [2022-12-14 09:55:31,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574479030] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:55:31,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [143719295] [2022-12-14 09:55:31,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:31,946 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:55:31,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:55:31,947 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:55:31,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-12-14 09:55:32,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:32,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 09:55:32,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:32,195 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:55:32,195 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:55:32,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:32,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:55:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:32,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [143719295] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:55:32,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200560064] [2022-12-14 09:55:32,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:32,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:55:32,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:55:32,709 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:55:32,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 09:55:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:32,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 09:55:32,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:32,881 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:55:32,882 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:55:33,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:33,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:55:33,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:33,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200560064] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:55:33,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:55:33,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-12-14 09:55:33,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916839334] [2022-12-14 09:55:33,240 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:55:33,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 09:55:33,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:55:33,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 09:55:33,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-12-14 09:55:33,241 INFO L87 Difference]: Start difference. First operand 1084 states and 4109 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:37,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:55:37,945 INFO L93 Difference]: Finished difference Result 2077 states and 8206 transitions. [2022-12-14 09:55:37,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 09:55:37,947 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 09:55:37,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:55:37,954 INFO L225 Difference]: With dead ends: 2077 [2022-12-14 09:55:37,955 INFO L226 Difference]: Without dead ends: 2077 [2022-12-14 09:55:37,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-12-14 09:55:37,955 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 258 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 09:55:37,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 43 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 09:55:37,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2022-12-14 09:55:37,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 1523. [2022-12-14 09:55:37,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1514 states have (on average 3.9947159841479523) internal successors, (6048), 1522 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:37,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 6048 transitions. [2022-12-14 09:55:37,985 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 6048 transitions. Word has length 10 [2022-12-14 09:55:37,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:55:37,985 INFO L495 AbstractCegarLoop]: Abstraction has 1523 states and 6048 transitions. [2022-12-14 09:55:37,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:37,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 6048 transitions. [2022-12-14 09:55:37,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 09:55:37,986 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:55:37,986 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2022-12-14 09:55:37,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 09:55:38,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2022-12-14 09:55:38,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-14 09:55:38,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:55:38,589 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 09:55:38,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:55:38,590 INFO L85 PathProgramCache]: Analyzing trace with hash -980152532, now seen corresponding path program 2 times [2022-12-14 09:55:38,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:55:38,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [919300552] [2022-12-14 09:55:38,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:55:38,591 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 09:55:38,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:55:38,593 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:55:38,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-12-14 09:55:38,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 09:55:38,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:55:38,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 09:55:38,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:38,824 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:55:38,824 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:55:39,091 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:39,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:55:40,297 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:40,298 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:55:40,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [919300552] [2022-12-14 09:55:40,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [919300552] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:55:40,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2021497572] [2022-12-14 09:55:40,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:55:40,298 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:55:40,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:55:40,299 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:55:40,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-12-14 09:55:40,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 09:55:40,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:55:40,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 09:55:40,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:40,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:55:40,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:55:41,566 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:55:41,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2021497572] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:55:41,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127188426] [2022-12-14 09:55:41,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:55:41,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:55:41,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:55:41,568 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:55:41,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-14 09:55:41,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 09:55:41,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:55:41,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 09:55:41,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:42,088 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:42,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:55:42,667 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:55:42,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127188426] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:55:42,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:55:42,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 9, 9] total 45 [2022-12-14 09:55:42,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906984678] [2022-12-14 09:55:42,667 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:55:42,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 09:55:42,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:55:42,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 09:55:42,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=1599, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 09:55:42,668 INFO L87 Difference]: Start difference. First operand 1523 states and 6048 transitions. Second operand has 46 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 45 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:05,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:56:05,661 INFO L93 Difference]: Finished difference Result 4129 states and 15454 transitions. [2022-12-14 09:56:05,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-14 09:56:05,663 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 45 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 09:56:05,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:56:05,674 INFO L225 Difference]: With dead ends: 4129 [2022-12-14 09:56:05,675 INFO L226 Difference]: Without dead ends: 4129 [2022-12-14 09:56:05,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2024 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=1616, Invalid=5026, Unknown=0, NotChecked=0, Total=6642 [2022-12-14 09:56:05,676 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1640 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 3030 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1640 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 3063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 3030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:56:05,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1640 Valid, 457 Invalid, 3063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 3030 Invalid, 0 Unknown, 0 Unchecked, 12.4s Time] [2022-12-14 09:56:05,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4129 states. [2022-12-14 09:56:05,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4129 to 2193. [2022-12-14 09:56:05,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2193 states, 2184 states have (on average 4.084249084249084) internal successors, (8920), 2192 states have internal predecessors, (8920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:05,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2193 states to 2193 states and 8920 transitions. [2022-12-14 09:56:05,729 INFO L78 Accepts]: Start accepts. Automaton has 2193 states and 8920 transitions. Word has length 11 [2022-12-14 09:56:05,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:56:05,729 INFO L495 AbstractCegarLoop]: Abstraction has 2193 states and 8920 transitions. [2022-12-14 09:56:05,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 45 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:05,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2193 states and 8920 transitions. [2022-12-14 09:56:05,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 09:56:05,730 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:56:05,730 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-12-14 09:56:05,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-14 09:56:05,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-12-14 09:56:06,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2022-12-14 09:56:06,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 09:56:06,332 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 09:56:06,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:56:06,334 INFO L85 PathProgramCache]: Analyzing trace with hash 142867379, now seen corresponding path program 3 times [2022-12-14 09:56:06,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:56:06,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [948043938] [2022-12-14 09:56:06,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:56:06,335 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 09:56:06,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:56:06,336 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:56:06,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-12-14 09:56:06,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 09:56:06,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:56:06,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 09:56:06,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:56:06,637 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:56:06,637 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:56:06,978 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:06,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:56:09,664 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:09,664 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:56:09,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [948043938] [2022-12-14 09:56:09,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [948043938] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:56:09,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1803734189] [2022-12-14 09:56:09,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:56:09,665 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:56:09,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:56:09,665 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:56:09,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-12-14 09:56:10,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 09:56:10,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:56:10,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 09:56:10,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:56:10,374 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:56:10,375 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:56:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:10,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:56:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:13,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1803734189] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:56:13,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559895187] [2022-12-14 09:56:13,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:56:13,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:56:13,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:56:13,405 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:56:13,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-14 09:56:15,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 09:56:15,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:56:15,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 09:56:15,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:56:15,216 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:56:15,216 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:56:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:15,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:56:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:15,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559895187] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:56:15,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:56:15,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 32 [2022-12-14 09:56:15,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430684403] [2022-12-14 09:56:15,636 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:56:15,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 09:56:15,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:56:15,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 09:56:15,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 09:56:15,637 INFO L87 Difference]: Start difference. First operand 2193 states and 8920 transitions. Second operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:36,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:56:36,165 INFO L93 Difference]: Finished difference Result 16427 states and 66358 transitions. [2022-12-14 09:56:36,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 09:56:36,166 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 09:56:36,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:56:36,240 INFO L225 Difference]: With dead ends: 16427 [2022-12-14 09:56:36,240 INFO L226 Difference]: Without dead ends: 16427 [2022-12-14 09:56:36,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=618, Invalid=1274, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 09:56:36,241 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 4384 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 3281 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4384 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 3284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 3281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:56:36,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4384 Valid, 441 Invalid, 3284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 3281 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2022-12-14 09:56:36,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16427 states. [2022-12-14 09:56:36,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16427 to 2205. [2022-12-14 09:56:36,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 2196 states have (on average 4.072859744990892) internal successors, (8944), 2204 states have internal predecessors, (8944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:36,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 8944 transitions. [2022-12-14 09:56:36,449 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 8944 transitions. Word has length 12 [2022-12-14 09:56:36,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:56:36,449 INFO L495 AbstractCegarLoop]: Abstraction has 2205 states and 8944 transitions. [2022-12-14 09:56:36,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:56:36,450 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 8944 transitions. [2022-12-14 09:56:36,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 09:56:36,451 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:56:36,451 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:56:36,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2022-12-14 09:56:36,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-12-14 09:56:36,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-14 09:56:37,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:56:37,053 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 09:56:37,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:56:37,055 INFO L85 PathProgramCache]: Analyzing trace with hash -847656898, now seen corresponding path program 1 times [2022-12-14 09:56:37,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:56:37,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [471339828] [2022-12-14 09:56:37,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:56:37,056 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 09:56:37,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:56:37,059 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:56:37,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:56:37,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:56:37,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 09:56:37,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:56:37,311 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:56:37,311 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:56:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:37,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:56:39,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:39,491 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:56:39,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [471339828] [2022-12-14 09:56:39,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [471339828] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:56:39,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [951932972] [2022-12-14 09:56:39,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:56:39,492 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:56:39,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:56:39,493 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:56:39,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-12-14 09:56:39,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:56:39,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 09:56:39,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:56:39,747 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:56:39,747 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:56:40,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:40,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:56:42,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:42,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [951932972] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:56:42,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709643003] [2022-12-14 09:56:42,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:56:42,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:56:42,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:56:42,898 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:56:42,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-14 09:56:43,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:56:43,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 09:56:43,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:56:43,101 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:56:43,102 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:56:43,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:43,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:56:45,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:56:45,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709643003] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:56:45,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:56:45,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 23 [2022-12-14 09:56:45,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709417428] [2022-12-14 09:56:45,247 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:56:45,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 09:56:45,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:56:45,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 09:56:45,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-12-14 09:56:45,249 INFO L87 Difference]: Start difference. First operand 2205 states and 8944 transitions. Second operand has 25 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:10,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:57:10,642 INFO L93 Difference]: Finished difference Result 3827 states and 15752 transitions. [2022-12-14 09:57:10,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 09:57:10,645 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 09:57:10,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:57:10,654 INFO L225 Difference]: With dead ends: 3827 [2022-12-14 09:57:10,654 INFO L226 Difference]: Without dead ends: 3827 [2022-12-14 09:57:10,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=553, Invalid=1517, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 09:57:10,655 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 873 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:57:10,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 166 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-12-14 09:57:10,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3827 states. [2022-12-14 09:57:10,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3827 to 2845. [2022-12-14 09:57:10,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2836 states have (on average 4.30818053596615) internal successors, (12218), 2844 states have internal predecessors, (12218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:10,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 12218 transitions. [2022-12-14 09:57:10,712 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 12218 transitions. Word has length 12 [2022-12-14 09:57:10,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:57:10,713 INFO L495 AbstractCegarLoop]: Abstraction has 2845 states and 12218 transitions. [2022-12-14 09:57:10,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:10,713 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 12218 transitions. [2022-12-14 09:57:10,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 09:57:10,714 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:57:10,714 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:57:10,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:57:10,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-12-14 09:57:11,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-14 09:57:11,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:57:11,317 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 09:57:11,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:57:11,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1071802973, now seen corresponding path program 2 times [2022-12-14 09:57:11,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:57:11,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [195680723] [2022-12-14 09:57:11,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:57:11,320 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 09:57:11,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:57:11,321 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:57:11,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-12-14 09:57:11,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 09:57:11,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:57:11,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 09:57:11,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:57:11,539 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:57:11,539 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:57:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 09:57:11,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:57:11,765 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:57:11,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [195680723] [2022-12-14 09:57:11,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [195680723] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:57:11,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:57:11,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:57:11,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726422027] [2022-12-14 09:57:11,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:57:11,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:57:11,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:57:11,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:57:11,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:57:11,767 INFO L87 Difference]: Start difference. First operand 2845 states and 12218 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:12,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:57:12,092 INFO L93 Difference]: Finished difference Result 2563 states and 10791 transitions. [2022-12-14 09:57:12,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:57:12,093 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 09:57:12,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:57:12,099 INFO L225 Difference]: With dead ends: 2563 [2022-12-14 09:57:12,099 INFO L226 Difference]: Without dead ends: 2563 [2022-12-14 09:57:12,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:57:12,099 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 59 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:57:12,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 6 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:57:12,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2022-12-14 09:57:12,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 1579. [2022-12-14 09:57:12,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1574 states have (on average 4.012071156289708) internal successors, (6315), 1578 states have internal predecessors, (6315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:12,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 6315 transitions. [2022-12-14 09:57:12,128 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 6315 transitions. Word has length 13 [2022-12-14 09:57:12,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:57:12,128 INFO L495 AbstractCegarLoop]: Abstraction has 1579 states and 6315 transitions. [2022-12-14 09:57:12,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:12,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 6315 transitions. [2022-12-14 09:57:12,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 09:57:12,130 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:57:12,130 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:57:12,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-12-14 09:57:12,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:57:12,331 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 09:57:12,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:57:12,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1353016746, now seen corresponding path program 2 times [2022-12-14 09:57:12,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:57:12,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1472232934] [2022-12-14 09:57:12,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:57:12,334 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 09:57:12,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:57:12,336 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:57:12,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-12-14 09:57:12,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 09:57:12,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:57:12,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 09:57:12,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:57:12,590 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:57:12,590 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:57:12,905 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:12,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:57:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:14,350 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:57:14,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1472232934] [2022-12-14 09:57:14,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1472232934] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:57:14,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1317102908] [2022-12-14 09:57:14,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:57:14,350 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:57:14,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:57:14,351 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:57:14,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-12-14 09:57:14,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 09:57:14,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:57:14,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 09:57:14,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:57:15,286 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:57:15,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:57:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:57:16,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1317102908] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:57:16,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937727830] [2022-12-14 09:57:16,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:57:16,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:57:16,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:57:16,230 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:57:16,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-14 09:57:16,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 09:57:16,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:57:16,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 09:57:16,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:57:16,440 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:57:16,440 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:57:17,351 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:17,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:57:18,785 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:18,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937727830] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:57:18,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:57:18,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 8, 9, 9] total 49 [2022-12-14 09:57:18,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592891076] [2022-12-14 09:57:18,786 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:57:18,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 09:57:18,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:57:18,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 09:57:18,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=2202, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 09:57:18,788 INFO L87 Difference]: Start difference. First operand 1579 states and 6315 transitions. Second operand has 50 states, 50 states have (on average 1.46) internal successors, (73), 49 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:41,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:57:41,520 INFO L93 Difference]: Finished difference Result 2209 states and 7470 transitions. [2022-12-14 09:57:41,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 09:57:41,520 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.46) internal successors, (73), 49 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 09:57:41,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:57:41,524 INFO L225 Difference]: With dead ends: 2209 [2022-12-14 09:57:41,524 INFO L226 Difference]: Without dead ends: 2209 [2022-12-14 09:57:41,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=995, Invalid=5167, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 09:57:41,526 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1578 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 4149 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1578 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 4177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 4149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2022-12-14 09:57:41,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1578 Valid, 360 Invalid, 4177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 4149 Invalid, 0 Unknown, 0 Unchecked, 13.8s Time] [2022-12-14 09:57:41,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2022-12-14 09:57:41,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 1465. [2022-12-14 09:57:41,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1460 states have (on average 3.8965753424657534) internal successors, (5689), 1464 states have internal predecessors, (5689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:41,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 5689 transitions. [2022-12-14 09:57:41,554 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 5689 transitions. Word has length 13 [2022-12-14 09:57:41,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:57:41,554 INFO L495 AbstractCegarLoop]: Abstraction has 1465 states and 5689 transitions. [2022-12-14 09:57:41,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.46) internal successors, (73), 49 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:41,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 5689 transitions. [2022-12-14 09:57:41,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 09:57:41,555 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:57:41,555 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2022-12-14 09:57:41,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2022-12-14 09:57:41,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-14 09:57:41,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-12-14 09:57:42,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:57:42,158 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 09:57:42,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:57:42,159 INFO L85 PathProgramCache]: Analyzing trace with hash -606136609, now seen corresponding path program 3 times [2022-12-14 09:57:42,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:57:42,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436417202] [2022-12-14 09:57:42,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:57:42,160 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:57:42,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:57:42,161 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:57:42,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-12-14 09:57:42,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 09:57:42,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:57:42,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 09:57:42,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:57:42,600 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:57:42,600 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:57:43,126 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:43,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:57:45,579 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:45,580 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:57:45,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436417202] [2022-12-14 09:57:45,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436417202] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:57:45,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1622885986] [2022-12-14 09:57:45,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:57:45,580 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:57:45,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:57:45,581 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:57:45,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-12-14 09:57:46,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 09:57:46,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:57:46,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 09:57:46,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:57:46,754 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:57:46,754 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:57:46,930 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:46,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:57:48,683 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:48,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1622885986] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:57:48,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120360089] [2022-12-14 09:57:48,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:57:48,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:57:48,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:57:48,684 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:57:48,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-14 09:57:48,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 09:57:48,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:57:48,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 09:57:48,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:57:49,042 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:57:49,043 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:57:49,485 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:49,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:57:51,513 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:51,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120360089] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:57:51,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:57:51,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 42 [2022-12-14 09:57:51,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674178811] [2022-12-14 09:57:51,513 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:57:51,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-14 09:57:51,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:57:51,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-14 09:57:51,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1570, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 09:57:51,514 INFO L87 Difference]: Start difference. First operand 1465 states and 5689 transitions. Second operand has 43 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:38,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:58:38,635 INFO L93 Difference]: Finished difference Result 4943 states and 17877 transitions. [2022-12-14 09:58:38,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-14 09:58:38,637 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 09:58:38,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:58:38,647 INFO L225 Difference]: With dead ends: 4943 [2022-12-14 09:58:38,647 INFO L226 Difference]: Without dead ends: 4943 [2022-12-14 09:58:38,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1577 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=1128, Invalid=4572, Unknown=0, NotChecked=0, Total=5700 [2022-12-14 09:58:38,649 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2712 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 5140 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2712 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 5195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 5140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:58:38,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2712 Valid, 725 Invalid, 5195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 5140 Invalid, 0 Unknown, 0 Unchecked, 23.6s Time] [2022-12-14 09:58:38,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4943 states. [2022-12-14 09:58:38,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4943 to 2233. [2022-12-14 09:58:38,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 2228 states have (on average 4.172800718132854) internal successors, (9297), 2232 states have internal predecessors, (9297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:38,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 9297 transitions. [2022-12-14 09:58:38,704 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 9297 transitions. Word has length 14 [2022-12-14 09:58:38,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:58:38,704 INFO L495 AbstractCegarLoop]: Abstraction has 2233 states and 9297 transitions. [2022-12-14 09:58:38,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:38,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 9297 transitions. [2022-12-14 09:58:38,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 09:58:38,706 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:38,706 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1] [2022-12-14 09:58:38,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-12-14 09:58:38,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2022-12-14 09:58:39,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-12-14 09:58:39,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:58:39,308 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 09:58:39,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:39,310 INFO L85 PathProgramCache]: Analyzing trace with hash -24234644, now seen corresponding path program 4 times [2022-12-14 09:58:39,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:58:39,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51392618] [2022-12-14 09:58:39,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:58:39,312 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 09:58:39,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:58:39,313 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 09:58:39,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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)] Waiting until timeout for monitored process [2022-12-14 09:58:39,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:58:39,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:58:39,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 09:58:39,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:58:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:39,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:58:40,896 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 35 treesize of output 29 [2022-12-14 09:58:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:41,951 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:58:41,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51392618] [2022-12-14 09:58:41,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51392618] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:58:41,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [896553729] [2022-12-14 09:58:41,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:58:41,951 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:58:41,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:58:41,952 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:58:41,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-12-14 09:58:42,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:58:42,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:58:42,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 09:58:42,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:58:42,287 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:58:42,287 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:58:43,475 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:43,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:58:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:47,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [896553729] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:58:47,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108852896] [2022-12-14 09:58:47,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:58:47,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:58:47,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:58:47,065 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:58:47,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-14 09:58:47,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:58:47,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:58:47,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 09:58:47,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:58:47,299 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:58:47,300 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:58:48,301 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 09:58:48,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:58:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 09:58:51,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108852896] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:58:51,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:58:51,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 7, 7] total 65 [2022-12-14 09:58:51,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349823779] [2022-12-14 09:58:51,513 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:58:51,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-12-14 09:58:51,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:58:51,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-12-14 09:58:51,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=3964, Unknown=0, NotChecked=0, Total=4422 [2022-12-14 09:58:51,516 INFO L87 Difference]: Start difference. First operand 2233 states and 9297 transitions. Second operand has 67 states, 66 states have (on average 1.196969696969697) internal successors, (79), 66 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:01:56,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:01:56,643 INFO L93 Difference]: Finished difference Result 12543 states and 48309 transitions. [2022-12-14 10:01:56,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2022-12-14 10:01:56,645 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.196969696969697) internal successors, (79), 66 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 10:01:56,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:01:56,686 INFO L225 Difference]: With dead ends: 12543 [2022-12-14 10:01:56,686 INFO L226 Difference]: Without dead ends: 12543 [2022-12-14 10:01:56,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18813 ImplicationChecksByTransitivity, 165.5s TimeCoverageRelationStatistics Valid=8575, Invalid=47357, Unknown=0, NotChecked=0, Total=55932 [2022-12-14 10:01:56,693 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 13487 mSDsluCounter, 2233 mSDsCounter, 0 mSdLazyCounter, 14222 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13487 SdHoareTripleChecker+Valid, 2336 SdHoareTripleChecker+Invalid, 14566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 14222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:01:56,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13487 Valid, 2336 Invalid, 14566 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [344 Valid, 14222 Invalid, 0 Unknown, 0 Unchecked, 28.7s Time] [2022-12-14 10:01:56,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12543 states. [2022-12-14 10:01:56,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12543 to 2133. [2022-12-14 10:01:56,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2133 states, 2128 states have (on average 3.9722744360902253) internal successors, (8453), 2132 states have internal predecessors, (8453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:01:56,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2133 states to 2133 states and 8453 transitions. [2022-12-14 10:01:56,798 INFO L78 Accepts]: Start accepts. Automaton has 2133 states and 8453 transitions. Word has length 15 [2022-12-14 10:01:56,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:01:56,798 INFO L495 AbstractCegarLoop]: Abstraction has 2133 states and 8453 transitions. [2022-12-14 10:01:56,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 1.196969696969697) internal successors, (79), 66 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:01:56,798 INFO L276 IsEmpty]: Start isEmpty. Operand 2133 states and 8453 transitions. [2022-12-14 10:01:56,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 10:01:56,800 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:01:56,800 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:01:56,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-12-14 10:01:57,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 10:01:57,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2022-12-14 10:01:57,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:01:57,402 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 10:01:57,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:01:57,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1634793098, now seen corresponding path program 3 times [2022-12-14 10:01:57,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:01:57,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510038772] [2022-12-14 10:01:57,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:01:57,405 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 10:01:57,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:01:57,407 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 10:01:57,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-12-14 10:01:57,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 10:01:57,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:01:57,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 10:01:57,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:01:57,750 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:01:57,751 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 10:01:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:01:58,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:01:59,383 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:01:59,383 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:01:59,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510038772] [2022-12-14 10:01:59,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510038772] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:01:59,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2007141662] [2022-12-14 10:01:59,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:01:59,383 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:01:59,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:01:59,384 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:01:59,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-12-14 10:01:59,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 10:01:59,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:01:59,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 10:01:59,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:01:59,889 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:01:59,889 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 10:02:00,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 10:02:00,925 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:02:00,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:02:03,705 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:02:03,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2007141662] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:02:03,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485982543] [2022-12-14 10:02:03,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:02:03,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:02:03,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:02:03,707 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:02:03,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-12-14 10:02:03,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 10:02:03,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:02:03,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 10:02:03,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:02:05,227 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:02:05,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:02:07,125 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:02:07,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485982543] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:02:07,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:02:07,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 11, 11, 12, 11] total 58 [2022-12-14 10:02:07,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918028746] [2022-12-14 10:02:07,125 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:02:07,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-12-14 10:02:07,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:02:07,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-12-14 10:02:07,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=3120, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 10:02:07,126 INFO L87 Difference]: Start difference. First operand 2133 states and 8453 transitions. Second operand has 60 states, 59 states have (on average 1.4067796610169492) internal successors, (83), 59 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:03:08,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:03:08,091 INFO L93 Difference]: Finished difference Result 5319 states and 17969 transitions. [2022-12-14 10:03:08,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-12-14 10:03:08,093 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.4067796610169492) internal successors, (83), 59 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 10:03:08,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:03:08,102 INFO L225 Difference]: With dead ends: 5319 [2022-12-14 10:03:08,102 INFO L226 Difference]: Without dead ends: 5319 [2022-12-14 10:03:08,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4402 ImplicationChecksByTransitivity, 43.6s TimeCoverageRelationStatistics Valid=2634, Invalid=12128, Unknown=0, NotChecked=0, Total=14762 [2022-12-14 10:03:08,103 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 4832 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 10336 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4832 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 10464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 10336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:03:08,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4832 Valid, 812 Invalid, 10464 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [128 Valid, 10336 Invalid, 0 Unknown, 0 Unchecked, 24.3s Time] [2022-12-14 10:03:08,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5319 states. [2022-12-14 10:03:08,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5319 to 2693. [2022-12-14 10:03:08,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2693 states, 2688 states have (on average 4.114583333333333) internal successors, (11060), 2692 states have internal predecessors, (11060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:03:08,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2693 states to 2693 states and 11060 transitions. [2022-12-14 10:03:08,162 INFO L78 Accepts]: Start accepts. Automaton has 2693 states and 11060 transitions. Word has length 15 [2022-12-14 10:03:08,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:03:08,162 INFO L495 AbstractCegarLoop]: Abstraction has 2693 states and 11060 transitions. [2022-12-14 10:03:08,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.4067796610169492) internal successors, (83), 59 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:03:08,163 INFO L276 IsEmpty]: Start isEmpty. Operand 2693 states and 11060 transitions. [2022-12-14 10:03:08,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 10:03:08,165 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:03:08,165 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1] [2022-12-14 10:03:08,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2022-12-14 10:03:08,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-12-14 10:03:08,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-12-14 10:03:08,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:03:08,767 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 10:03:08,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:03:08,768 INFO L85 PathProgramCache]: Analyzing trace with hash 642914853, now seen corresponding path program 5 times [2022-12-14 10:03:08,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:03:08,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58300643] [2022-12-14 10:03:08,770 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 10:03:08,770 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 10:03:08,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:03:08,772 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 10:03:08,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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)] Waiting until timeout for monitored process [2022-12-14 10:03:09,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-14 10:03:09,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:03:09,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 10:03:09,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:03:09,179 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:03:09,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 10:03:09,808 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:03:09,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:03:14,051 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:03:14,051 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:03:14,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58300643] [2022-12-14 10:03:14,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58300643] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:03:14,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1977883675] [2022-12-14 10:03:14,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 10:03:14,051 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:03:14,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:03:14,052 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:03:14,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-12-14 10:03:14,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-14 10:03:14,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:03:14,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 10:03:14,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:03:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:03:16,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:03:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:03:19,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1977883675] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:03:19,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157099183] [2022-12-14 10:03:19,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 10:03:19,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:03:19,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:03:19,359 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:03:19,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-12-14 10:03:20,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-14 10:03:20,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:03:20,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 10:03:20,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:03:22,416 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:03:22,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:03:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:03:24,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157099183] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:03:24,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:03:24,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 14, 14, 14, 14] total 78 [2022-12-14 10:03:24,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088968519] [2022-12-14 10:03:24,267 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:03:24,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-12-14 10:03:24,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:03:24,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-12-14 10:03:24,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=580, Invalid=5582, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 10:03:24,268 INFO L87 Difference]: Start difference. First operand 2693 states and 11060 transitions. Second operand has 79 states, 79 states have (on average 1.139240506329114) internal successors, (90), 78 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:04:51,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:04:51,114 INFO L93 Difference]: Finished difference Result 7519 states and 29233 transitions. [2022-12-14 10:04:51,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-12-14 10:04:51,117 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.139240506329114) internal successors, (90), 78 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-12-14 10:04:51,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:04:51,139 INFO L225 Difference]: With dead ends: 7519 [2022-12-14 10:04:51,139 INFO L226 Difference]: Without dead ends: 7519 [2022-12-14 10:04:51,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5503 ImplicationChecksByTransitivity, 41.5s TimeCoverageRelationStatistics Valid=2825, Invalid=18637, Unknown=0, NotChecked=0, Total=21462 [2022-12-14 10:04:51,140 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 4632 mSDsluCounter, 3247 mSDsCounter, 0 mSdLazyCounter, 19358 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4632 SdHoareTripleChecker+Valid, 3341 SdHoareTripleChecker+Invalid, 19439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 19358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:04:51,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4632 Valid, 3341 Invalid, 19439 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [81 Valid, 19358 Invalid, 0 Unknown, 0 Unchecked, 57.3s Time] [2022-12-14 10:04:51,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7519 states. [2022-12-14 10:04:51,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7519 to 4183. [2022-12-14 10:04:51,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4183 states, 4178 states have (on average 4.092388702728578) internal successors, (17098), 4182 states have internal predecessors, (17098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:04:51,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4183 states to 4183 states and 17098 transitions. [2022-12-14 10:04:51,251 INFO L78 Accepts]: Start accepts. Automaton has 4183 states and 17098 transitions. Word has length 20 [2022-12-14 10:04:51,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:04:51,251 INFO L495 AbstractCegarLoop]: Abstraction has 4183 states and 17098 transitions. [2022-12-14 10:04:51,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.139240506329114) internal successors, (90), 78 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:04:51,251 INFO L276 IsEmpty]: Start isEmpty. Operand 4183 states and 17098 transitions. [2022-12-14 10:04:51,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 10:04:51,261 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:04:51,261 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:04:51,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-12-14 10:04:51,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2022-12-14 10:04:51,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-14 10:04:51,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 10:04:51,863 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 10:04:51,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:04:51,866 INFO L85 PathProgramCache]: Analyzing trace with hash -207812884, now seen corresponding path program 1 times [2022-12-14 10:04:51,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:04:51,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1489607564] [2022-12-14 10:04:51,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:04:51,868 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 10:04:51,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:04:51,871 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 10:04:51,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-12-14 10:04:51,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:04:51,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 10:04:51,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:04:52,072 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 10:04:52,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:04:52,072 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:04:52,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1489607564] [2022-12-14 10:04:52,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1489607564] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:04:52,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:04:52,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 10:04:52,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479326700] [2022-12-14 10:04:52,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:04:52,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:04:52,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:04:52,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:04:52,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:04:52,073 INFO L87 Difference]: Start difference. First operand 4183 states and 17098 transitions. Second operand has 3 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:04:52,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:04:52,233 INFO L93 Difference]: Finished difference Result 4430 states and 17867 transitions. [2022-12-14 10:04:52,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:04:52,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-12-14 10:04:52,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:04:52,245 INFO L225 Difference]: With dead ends: 4430 [2022-12-14 10:04:52,245 INFO L226 Difference]: Without dead ends: 4326 [2022-12-14 10:04:52,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:04:52,245 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:04:52,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:04:52,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2022-12-14 10:04:52,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 4094. [2022-12-14 10:04:52,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4094 states, 4089 states have (on average 4.127415015896307) internal successors, (16877), 4093 states have internal predecessors, (16877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:04:52,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4094 states to 4094 states and 16877 transitions. [2022-12-14 10:04:52,323 INFO L78 Accepts]: Start accepts. Automaton has 4094 states and 16877 transitions. Word has length 20 [2022-12-14 10:04:52,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:04:52,323 INFO L495 AbstractCegarLoop]: Abstraction has 4094 states and 16877 transitions. [2022-12-14 10:04:52,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:04:52,323 INFO L276 IsEmpty]: Start isEmpty. Operand 4094 states and 16877 transitions. [2022-12-14 10:04:52,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 10:04:52,328 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:04:52,328 INFO L195 NwaCegarLoop]: trace histogram [11, 6, 1, 1, 1, 1, 1] [2022-12-14 10:04:52,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Ended with exit code 0 [2022-12-14 10:04:52,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 10:04:52,529 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 10:04:52,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:04:52,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1318037345, now seen corresponding path program 6 times [2022-12-14 10:04:52,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:04:52,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551163229] [2022-12-14 10:04:52,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 10:04:52,532 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 10:04:52,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:04:52,535 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 10:04:52,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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)] Waiting until timeout for monitored process [2022-12-14 10:04:52,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-12-14 10:04:52,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:04:52,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 10:04:52,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:04:52,973 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:04:52,974 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 10:04:53,833 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 32 proven. 49 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:04:53,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:04:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:04:58,795 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:04:58,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551163229] [2022-12-14 10:04:58,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551163229] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:04:58,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1719325850] [2022-12-14 10:04:58,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 10:04:58,796 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:04:58,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:04:58,797 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:04:58,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-12-14 10:05:03,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-12-14 10:05:03,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:05:03,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-14 10:05:03,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:05:03,565 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:05:03,566 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 10:05:04,857 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 35 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:05:04,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:05:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 38 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:05:15,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1719325850] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:05:15,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173233419] [2022-12-14 10:05:15,138 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 10:05:15,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:05:15,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:05:15,139 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:05:15,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-12-14 10:05:15,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-12-14 10:05:15,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:05:15,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 10:05:15,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:05:19,485 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 32 proven. 49 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:05:19,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:05:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 32 proven. 49 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:05:24,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173233419] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:05:24,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:05:24,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 16, 16, 17, 17] total 93 [2022-12-14 10:05:24,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823300706] [2022-12-14 10:05:24,180 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:05:24,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-12-14 10:05:24,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:05:24,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-12-14 10:05:24,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=644, Invalid=8098, Unknown=0, NotChecked=0, Total=8742 [2022-12-14 10:05:24,181 INFO L87 Difference]: Start difference. First operand 4094 states and 16877 transitions. Second operand has 94 states, 94 states have (on average 1.127659574468085) internal successors, (106), 93 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:10,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:10,151 INFO L93 Difference]: Finished difference Result 7139 states and 27785 transitions. [2022-12-14 10:07:10,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-12-14 10:07:10,153 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.127659574468085) internal successors, (106), 93 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 10:07:10,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:10,169 INFO L225 Difference]: With dead ends: 7139 [2022-12-14 10:07:10,169 INFO L226 Difference]: Without dead ends: 7139 [2022-12-14 10:07:10,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6089 ImplicationChecksByTransitivity, 76.9s TimeCoverageRelationStatistics Valid=3563, Invalid=23169, Unknown=0, NotChecked=0, Total=26732 [2022-12-14 10:07:10,171 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 6374 mSDsluCounter, 3818 mSDsCounter, 0 mSdLazyCounter, 22348 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6374 SdHoareTripleChecker+Valid, 3914 SdHoareTripleChecker+Invalid, 22463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 22348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:10,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6374 Valid, 3914 Invalid, 22463 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [115 Valid, 22348 Invalid, 0 Unknown, 0 Unchecked, 52.0s Time] [2022-12-14 10:07:10,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7139 states. [2022-12-14 10:07:10,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7139 to 4413. [2022-12-14 10:07:10,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4413 states, 4408 states have (on average 4.152676950998185) internal successors, (18305), 4412 states have internal predecessors, (18305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:10,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4413 states to 4413 states and 18305 transitions. [2022-12-14 10:07:10,269 INFO L78 Accepts]: Start accepts. Automaton has 4413 states and 18305 transitions. Word has length 22 [2022-12-14 10:07:10,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:07:10,269 INFO L495 AbstractCegarLoop]: Abstraction has 4413 states and 18305 transitions. [2022-12-14 10:07:10,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.127659574468085) internal successors, (106), 93 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:10,270 INFO L276 IsEmpty]: Start isEmpty. Operand 4413 states and 18305 transitions. [2022-12-14 10:07:10,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 10:07:10,273 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:10,274 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:07:10,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (57)] Ended with exit code 0 [2022-12-14 10:07:10,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-12-14 10:07:10,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 10:07:10,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 10:07:10,876 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 10:07:10,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:10,877 INFO L85 PathProgramCache]: Analyzing trace with hash -312775473, now seen corresponding path program 4 times [2022-12-14 10:07:10,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:07:10,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1192572125] [2022-12-14 10:07:10,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:07:10,878 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:07:10,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:07:10,879 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 10:07:10,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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)] Waiting until timeout for monitored process [2022-12-14 10:07:11,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:07:11,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:07:11,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 10:07:11,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:11,202 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:07:11,202 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 10:07:11,845 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:07:11,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:15,803 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:15,803 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:07:15,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1192572125] [2022-12-14 10:07:15,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1192572125] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:15,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1433237043] [2022-12-14 10:07:15,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:07:15,803 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:07:15,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:07:15,804 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:07:15,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-12-14 10:07:16,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:07:16,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:07:16,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 10:07:16,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:16,313 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:07:16,314 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 10:07:18,343 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:07:18,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:22,036 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:07:22,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1433237043] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:22,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602028057] [2022-12-14 10:07:22,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:07:22,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:07:22,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:07:22,038 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:07:22,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-12-14 10:07:22,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:07:22,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:07:22,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 10:07:22,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:22,322 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:07:22,322 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 10:07:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:07:24,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:26,788 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:07:26,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602028057] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:26,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:07:26,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 16, 16, 14, 14] total 83 [2022-12-14 10:07:26,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805788749] [2022-12-14 10:07:26,789 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:07:26,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-12-14 10:07:26,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:07:26,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-12-14 10:07:26,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=6151, Unknown=0, NotChecked=0, Total=6972 [2022-12-14 10:07:26,790 INFO L87 Difference]: Start difference. First operand 4413 states and 18305 transitions. Second operand has 84 states, 84 states have (on average 1.2857142857142858) internal successors, (108), 83 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:08:20,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:08:20,190 INFO L93 Difference]: Finished difference Result 7043 states and 24252 transitions. [2022-12-14 10:08:20,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-14 10:08:20,193 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.2857142857142858) internal successors, (108), 83 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 10:08:20,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:08:20,207 INFO L225 Difference]: With dead ends: 7043 [2022-12-14 10:08:20,207 INFO L226 Difference]: Without dead ends: 7043 [2022-12-14 10:08:20,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4377 ImplicationChecksByTransitivity, 35.1s TimeCoverageRelationStatistics Valid=2290, Invalid=12230, Unknown=0, NotChecked=0, Total=14520 [2022-12-14 10:08:20,209 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 4094 mSDsluCounter, 1540 mSDsCounter, 0 mSdLazyCounter, 11415 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4094 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 11479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 11415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:08:20,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4094 Valid, 1595 Invalid, 11479 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [64 Valid, 11415 Invalid, 0 Unknown, 0 Unchecked, 31.4s Time] [2022-12-14 10:08:20,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7043 states. [2022-12-14 10:08:20,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7043 to 3691. [2022-12-14 10:08:20,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3691 states, 3686 states have (on average 4.045849158979924) internal successors, (14913), 3690 states have internal predecessors, (14913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:08:20,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3691 states to 3691 states and 14913 transitions. [2022-12-14 10:08:20,289 INFO L78 Accepts]: Start accepts. Automaton has 3691 states and 14913 transitions. Word has length 22 [2022-12-14 10:08:20,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:08:20,289 INFO L495 AbstractCegarLoop]: Abstraction has 3691 states and 14913 transitions. [2022-12-14 10:08:20,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.2857142857142858) internal successors, (108), 83 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:08:20,289 INFO L276 IsEmpty]: Start isEmpty. Operand 3691 states and 14913 transitions. [2022-12-14 10:08:20,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 10:08:20,292 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:08:20,292 INFO L195 NwaCegarLoop]: trace histogram [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 10:08:20,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 10:08:20,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (60)] Ended with exit code 0 [2022-12-14 10:08:20,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-12-14 10:08:20,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:08:20,895 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 10:08:20,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:08:20,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1994372784, now seen corresponding path program 1 times [2022-12-14 10:08:20,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:08:20,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183951251] [2022-12-14 10:08:20,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:08:20,898 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 10:08:20,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:08:20,900 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 10:08:20,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-12-14 10:08:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:08:21,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 10:08:21,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:08:21,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:21,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:08:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:21,543 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:08:21,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183951251] [2022-12-14 10:08:21,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183951251] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:08:21,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1069484477] [2022-12-14 10:08:21,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:08:21,543 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:08:21,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:08:21,544 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:08:21,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2022-12-14 10:08:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:08:21,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 10:08:21,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:08:21,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:21,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:08:22,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:22,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1069484477] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:08:22,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60248862] [2022-12-14 10:08:22,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:08:22,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:08:22,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:08:22,182 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:08:22,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-12-14 10:08:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:08:22,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:08:22,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:08:22,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:22,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:08:22,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:22,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60248862] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:08:22,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:08:22,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 9, 8] total 33 [2022-12-14 10:08:22,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699734164] [2022-12-14 10:08:22,993 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:08:22,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 10:08:22,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:08:22,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 10:08:22,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 10:08:22,994 INFO L87 Difference]: Start difference. First operand 3691 states and 14913 transitions. Second operand has 33 states, 33 states have (on average 2.878787878787879) internal successors, (95), 33 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:08:28,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:08:28,279 INFO L93 Difference]: Finished difference Result 6575 states and 24361 transitions. [2022-12-14 10:08:28,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-14 10:08:28,280 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.878787878787879) internal successors, (95), 33 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 10:08:28,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:08:28,296 INFO L225 Difference]: With dead ends: 6575 [2022-12-14 10:08:28,296 INFO L226 Difference]: Without dead ends: 6575 [2022-12-14 10:08:28,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1309, Invalid=3521, Unknown=0, NotChecked=0, Total=4830 [2022-12-14 10:08:28,297 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 900 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:08:28,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [900 Valid, 67 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1308 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 10:08:28,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6575 states. [2022-12-14 10:08:28,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6575 to 4097. [2022-12-14 10:08:28,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4097 states, 4092 states have (on average 4.0552297165200395) internal successors, (16594), 4096 states have internal predecessors, (16594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:08:28,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4097 states to 4097 states and 16594 transitions. [2022-12-14 10:08:28,384 INFO L78 Accepts]: Start accepts. Automaton has 4097 states and 16594 transitions. Word has length 22 [2022-12-14 10:08:28,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:08:28,385 INFO L495 AbstractCegarLoop]: Abstraction has 4097 states and 16594 transitions. [2022-12-14 10:08:28,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.878787878787879) internal successors, (95), 33 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:08:28,385 INFO L276 IsEmpty]: Start isEmpty. Operand 4097 states and 16594 transitions. [2022-12-14 10:08:28,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 10:08:28,389 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:08:28,389 INFO L195 NwaCegarLoop]: trace histogram [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 10:08:28,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (63)] Ended with exit code 0 [2022-12-14 10:08:28,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-12-14 10:08:28,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-12-14 10:08:28,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 10:08:28,992 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 10:08:28,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:08:28,993 INFO L85 PathProgramCache]: Analyzing trace with hash -2083370994, now seen corresponding path program 2 times [2022-12-14 10:08:28,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:08:28,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154410667] [2022-12-14 10:08:28,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:08:28,994 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 10:08:28,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:08:28,995 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 10:08:28,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-12-14 10:08:29,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:08:29,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:08:29,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 10:08:29,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:08:29,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:29,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:08:29,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:29,796 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:08:29,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154410667] [2022-12-14 10:08:29,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1154410667] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:08:29,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [855443467] [2022-12-14 10:08:29,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:08:29,796 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:08:29,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:08:29,797 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:08:29,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2022-12-14 10:08:30,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:08:30,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:08:30,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:08:30,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:08:30,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:30,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:08:30,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:30,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [855443467] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 10:08:30,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:08:30,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 20 [2022-12-14 10:08:30,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355937512] [2022-12-14 10:08:30,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:08:30,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:08:30,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:08:30,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:08:30,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2022-12-14 10:08:30,426 INFO L87 Difference]: Start difference. First operand 4097 states and 16594 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:08:31,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:08:31,014 INFO L93 Difference]: Finished difference Result 4857 states and 18808 transitions. [2022-12-14 10:08:31,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:08:31,015 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 10:08:31,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:08:31,025 INFO L225 Difference]: With dead ends: 4857 [2022-12-14 10:08:31,026 INFO L226 Difference]: Without dead ends: 4857 [2022-12-14 10:08:31,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2022-12-14 10:08:31,026 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 93 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:08:31,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 16 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 10:08:31,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4857 states. [2022-12-14 10:08:31,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4857 to 4183. [2022-12-14 10:08:31,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4183 states, 4178 states have (on average 4.032551460028722) internal successors, (16848), 4182 states have internal predecessors, (16848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:08:31,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4183 states to 4183 states and 16848 transitions. [2022-12-14 10:08:31,099 INFO L78 Accepts]: Start accepts. Automaton has 4183 states and 16848 transitions. Word has length 22 [2022-12-14 10:08:31,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:08:31,099 INFO L495 AbstractCegarLoop]: Abstraction has 4183 states and 16848 transitions. [2022-12-14 10:08:31,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:08:31,099 INFO L276 IsEmpty]: Start isEmpty. Operand 4183 states and 16848 transitions. [2022-12-14 10:08:31,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 10:08:31,103 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:08:31,104 INFO L195 NwaCegarLoop]: trace histogram [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 10:08:31,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Ended with exit code 0 [2022-12-14 10:08:31,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (66)] Ended with exit code 0 [2022-12-14 10:08:31,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:08:31,505 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 10:08:31,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:08:31,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1618906162, now seen corresponding path program 3 times [2022-12-14 10:08:31,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:08:31,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1404094013] [2022-12-14 10:08:31,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:08:31,508 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 10:08:31,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:08:31,511 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 10:08:31,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-12-14 10:08:31,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 10:08:31,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:08:31,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 10:08:31,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:08:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:31,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:08:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:32,175 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:08:32,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1404094013] [2022-12-14 10:08:32,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1404094013] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:08:32,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1620480134] [2022-12-14 10:08:32,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:08:32,176 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:08:32,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:08:32,176 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:08:32,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-12-14 10:08:32,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 10:08:32,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:08:32,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:08:32,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:08:32,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:32,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:08:32,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:32,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1620480134] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 10:08:32,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:08:32,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 20 [2022-12-14 10:08:32,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131159018] [2022-12-14 10:08:32,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:08:32,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:08:32,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:08:32,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:08:32,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-12-14 10:08:32,737 INFO L87 Difference]: Start difference. First operand 4183 states and 16848 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:08:33,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:08:33,248 INFO L93 Difference]: Finished difference Result 4683 states and 18343 transitions. [2022-12-14 10:08:33,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 10:08:33,249 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 10:08:33,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:08:33,259 INFO L225 Difference]: With dead ends: 4683 [2022-12-14 10:08:33,260 INFO L226 Difference]: Without dead ends: 4683 [2022-12-14 10:08:33,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2022-12-14 10:08:33,260 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 85 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:08:33,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 16 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:08:33,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4683 states. [2022-12-14 10:08:33,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4683 to 4327. [2022-12-14 10:08:33,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4327 states, 4322 states have (on average 3.9794076816288757) internal successors, (17199), 4326 states have internal predecessors, (17199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:08:33,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4327 states to 4327 states and 17199 transitions. [2022-12-14 10:08:33,335 INFO L78 Accepts]: Start accepts. Automaton has 4327 states and 17199 transitions. Word has length 22 [2022-12-14 10:08:33,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:08:33,335 INFO L495 AbstractCegarLoop]: Abstraction has 4327 states and 17199 transitions. [2022-12-14 10:08:33,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:08:33,335 INFO L276 IsEmpty]: Start isEmpty. Operand 4327 states and 17199 transitions. [2022-12-14 10:08:33,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 10:08:33,340 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:08:33,340 INFO L195 NwaCegarLoop]: trace histogram [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 10:08:33,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-12-14 10:08:33,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (68)] Ended with exit code 0 [2022-12-14 10:08:33,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:08:33,742 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 10:08:33,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:08:33,743 INFO L85 PathProgramCache]: Analyzing trace with hash 506013662, now seen corresponding path program 4 times [2022-12-14 10:08:33,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:08:33,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [549666481] [2022-12-14 10:08:33,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:08:33,744 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 10:08:33,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:08:33,747 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 10:08:33,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-12-14 10:08:33,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:08:33,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:08:33,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 10:08:33,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:08:34,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:34,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:08:34,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:34,410 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:08:34,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [549666481] [2022-12-14 10:08:34,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [549666481] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:08:34,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [61482976] [2022-12-14 10:08:34,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:08:34,411 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:08:34,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:08:34,412 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:08:34,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-12-14 10:08:34,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:08:34,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:08:34,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 10:08:34,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:08:34,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:34,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:08:35,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:35,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [61482976] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:08:35,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403005826] [2022-12-14 10:08:35,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:08:35,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:08:35,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:08:35,003 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:08:35,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-12-14 10:08:35,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:08:35,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:08:35,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:08:35,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:08:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:35,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:08:35,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:35,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403005826] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:08:35,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:08:35,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 9, 8] total 32 [2022-12-14 10:08:35,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388341537] [2022-12-14 10:08:35,713 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:08:35,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 10:08:35,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:08:35,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 10:08:35,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2022-12-14 10:08:35,714 INFO L87 Difference]: Start difference. First operand 4327 states and 17199 transitions. Second operand has 32 states, 32 states have (on average 2.9375) internal successors, (94), 32 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:08:42,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:08:42,327 INFO L93 Difference]: Finished difference Result 9293 states and 34889 transitions. [2022-12-14 10:08:42,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 10:08:42,328 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 32 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 10:08:42,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:08:42,349 INFO L225 Difference]: With dead ends: 9293 [2022-12-14 10:08:42,349 INFO L226 Difference]: Without dead ends: 9293 [2022-12-14 10:08:42,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1502, Invalid=4048, Unknown=0, NotChecked=0, Total=5550 [2022-12-14 10:08:42,350 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 660 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 1669 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:08:42,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 117 Invalid, 1701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1669 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-12-14 10:08:42,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9293 states. [2022-12-14 10:08:42,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9293 to 4595. [2022-12-14 10:08:42,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4595 states, 4590 states have (on average 4.040522875816993) internal successors, (18546), 4594 states have internal predecessors, (18546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:08:42,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4595 states to 4595 states and 18546 transitions. [2022-12-14 10:08:42,481 INFO L78 Accepts]: Start accepts. Automaton has 4595 states and 18546 transitions. Word has length 22 [2022-12-14 10:08:42,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:08:42,481 INFO L495 AbstractCegarLoop]: Abstraction has 4595 states and 18546 transitions. [2022-12-14 10:08:42,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 32 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:08:42,481 INFO L276 IsEmpty]: Start isEmpty. Operand 4595 states and 18546 transitions. [2022-12-14 10:08:42,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 10:08:42,486 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:08:42,486 INFO L195 NwaCegarLoop]: trace histogram [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 10:08:42,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (70)] Ended with exit code 0 [2022-12-14 10:08:42,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-12-14 10:08:42,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-12-14 10:08:43,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 10:08:43,088 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 10:08:43,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:08:43,090 INFO L85 PathProgramCache]: Analyzing trace with hash 417015452, now seen corresponding path program 5 times [2022-12-14 10:08:43,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:08:43,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296133998] [2022-12-14 10:08:43,091 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 10:08:43,092 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 10:08:43,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:08:43,093 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 10:08:43,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-12-14 10:08:43,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:08:43,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:08:43,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 10:08:43,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:08:43,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:43,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:08:43,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:43,876 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:08:43,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296133998] [2022-12-14 10:08:43,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296133998] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:08:43,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1030209383] [2022-12-14 10:08:43,876 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 10:08:43,876 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:08:43,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:08:43,877 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:08:43,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (73)] Waiting until timeout for monitored process [2022-12-14 10:08:44,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:08:44,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:08:44,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 10:08:44,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:08:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:44,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:08:44,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:44,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1030209383] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:08:44,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051722985] [2022-12-14 10:08:44,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 10:08:44,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:08:44,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:08:44,642 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:08:44,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-12-14 10:08:44,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:08:44,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:08:44,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:08:44,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:08:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:45,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:08:45,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:45,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051722985] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:08:45,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:08:45,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7, 7, 9, 8] total 31 [2022-12-14 10:08:45,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709777114] [2022-12-14 10:08:45,220 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:08:45,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 10:08:45,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:08:45,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 10:08:45,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=721, Unknown=0, NotChecked=0, Total=930 [2022-12-14 10:08:45,221 INFO L87 Difference]: Start difference. First operand 4595 states and 18546 transitions. Second operand has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 31 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:08:52,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:08:52,024 INFO L93 Difference]: Finished difference Result 9337 states and 35045 transitions. [2022-12-14 10:08:52,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 10:08:52,026 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 31 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 10:08:52,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:08:52,047 INFO L225 Difference]: With dead ends: 9337 [2022-12-14 10:08:52,047 INFO L226 Difference]: Without dead ends: 9337 [2022-12-14 10:08:52,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1432, Invalid=4118, Unknown=0, NotChecked=0, Total=5550 [2022-12-14 10:08:52,048 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 703 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1490 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:08:52,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [703 Valid, 96 Invalid, 1515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1490 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-12-14 10:08:52,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9337 states. [2022-12-14 10:08:52,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9337 to 4491. [2022-12-14 10:08:52,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4491 states, 4486 states have (on average 4.006687472135533) internal successors, (17974), 4490 states have internal predecessors, (17974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:08:52,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4491 states to 4491 states and 17974 transitions. [2022-12-14 10:08:52,163 INFO L78 Accepts]: Start accepts. Automaton has 4491 states and 17974 transitions. Word has length 22 [2022-12-14 10:08:52,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:08:52,163 INFO L495 AbstractCegarLoop]: Abstraction has 4491 states and 17974 transitions. [2022-12-14 10:08:52,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 31 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:08:52,163 INFO L276 IsEmpty]: Start isEmpty. Operand 4491 states and 17974 transitions. [2022-12-14 10:08:52,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 10:08:52,168 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:08:52,168 INFO L195 NwaCegarLoop]: trace histogram [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 10:08:52,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (73)] Ended with exit code 0 [2022-12-14 10:08:52,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-12-14 10:08:52,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Ended with exit code 0 [2022-12-14 10:08:52,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 10:08:52,771 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 10:08:52,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:08:52,772 INFO L85 PathProgramCache]: Analyzing trace with hash 460798944, now seen corresponding path program 6 times [2022-12-14 10:08:52,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:08:52,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [856058997] [2022-12-14 10:08:52,774 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 10:08:52,775 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 10:08:52,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:08:52,776 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 10:08:52,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-12-14 10:08:52,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-14 10:08:52,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:08:52,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 10:08:52,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:08:53,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:53,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:08:53,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:53,397 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:08:53,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [856058997] [2022-12-14 10:08:53,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [856058997] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:08:53,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [34977912] [2022-12-14 10:08:53,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 10:08:53,397 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:08:53,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:08:53,398 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:08:53,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (76)] Waiting until timeout for monitored process [2022-12-14 10:08:53,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-14 10:08:53,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:08:53,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:08:53,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:08:53,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:53,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:08:53,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:53,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [34977912] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 10:08:53,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:08:53,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 6] total 18 [2022-12-14 10:08:53,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094491425] [2022-12-14 10:08:53,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:08:53,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:08:53,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:08:53,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:08:53,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2022-12-14 10:08:53,974 INFO L87 Difference]: Start difference. First operand 4491 states and 17974 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:08:54,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:08:54,570 INFO L93 Difference]: Finished difference Result 6163 states and 24698 transitions. [2022-12-14 10:08:54,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 10:08:54,571 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 10:08:54,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:08:54,585 INFO L225 Difference]: With dead ends: 6163 [2022-12-14 10:08:54,585 INFO L226 Difference]: Without dead ends: 6163 [2022-12-14 10:08:54,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2022-12-14 10:08:54,586 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 66 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:08:54,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 17 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 10:08:54,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6163 states. [2022-12-14 10:08:54,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6163 to 4627. [2022-12-14 10:08:54,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4627 states, 4622 states have (on average 3.962137602769364) internal successors, (18313), 4626 states have internal predecessors, (18313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:08:54,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4627 states to 4627 states and 18313 transitions. [2022-12-14 10:08:54,670 INFO L78 Accepts]: Start accepts. Automaton has 4627 states and 18313 transitions. Word has length 22 [2022-12-14 10:08:54,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:08:54,670 INFO L495 AbstractCegarLoop]: Abstraction has 4627 states and 18313 transitions. [2022-12-14 10:08:54,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:08:54,670 INFO L276 IsEmpty]: Start isEmpty. Operand 4627 states and 18313 transitions. [2022-12-14 10:08:54,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 10:08:54,676 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:08:54,676 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1] [2022-12-14 10:08:54,686 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Ended with exit code 0 [2022-12-14 10:08:54,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (76)] Ended with exit code 0 [2022-12-14 10:08:55,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:08:55,078 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 10:08:55,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:08:55,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1248027732, now seen corresponding path program 7 times [2022-12-14 10:08:55,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:08:55,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [547266572] [2022-12-14 10:08:55,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:08:55,079 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 10:08:55,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:08:55,080 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -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 10:08:55,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-12-14 10:08:55,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:08:55,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 10:08:55,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:08:55,458 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:08:55,458 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 10:08:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:08:56,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:03,018 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:03,018 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:09:03,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [547266572] [2022-12-14 10:09:03,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [547266572] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:09:03,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [162070530] [2022-12-14 10:09:03,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:09:03,018 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:09:03,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:09:03,019 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:09:03,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (78)] Waiting until timeout for monitored process [2022-12-14 10:09:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:03,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 10:09:03,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:06,345 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 18 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:09:06,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:11,641 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 18 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:09:11,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [162070530] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:09:11,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686783899] [2022-12-14 10:09:11,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:09:11,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:11,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:11,643 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:09:11,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb874c1a-6d8a-44ab-852e-39918750d248/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-12-14 10:09:11,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:11,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 10:09:11,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:14,044 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:14,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:17,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686783899] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:09:17,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:09:17,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 20, 20, 21, 21] total 101 [2022-12-14 10:09:17,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869671248] [2022-12-14 10:09:17,931 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:09:17,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-12-14 10:09:17,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:09:17,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-12-14 10:09:17,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=9427, Unknown=0, NotChecked=0, Total=10302 [2022-12-14 10:09:17,932 INFO L87 Difference]: Start difference. First operand 4627 states and 18313 transitions. Second operand has 102 states, 102 states have (on average 1.1176470588235294) internal successors, (114), 101 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)