./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a 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_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur --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 c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 --- 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-38b53e6 [2022-11-26 00:05:01,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:05:01,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:05:01,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:05:01,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:05:01,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:05:01,714 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:05:01,718 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:05:01,720 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:05:01,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:05:01,729 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:05:01,731 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:05:01,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:05:01,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:05:01,733 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:05:01,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:05:01,735 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:05:01,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:05:01,738 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:05:01,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:05:01,746 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:05:01,747 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:05:01,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:05:01,751 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:05:01,755 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:05:01,757 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:05:01,758 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:05:01,759 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:05:01,760 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:05:01,763 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:05:01,765 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:05:01,766 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:05:01,767 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:05:01,769 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:05:01,771 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:05:01,771 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:05:01,772 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:05:01,772 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:05:01,772 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:05:01,773 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:05:01,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:05:01,775 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-26 00:05:01,816 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:05:01,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:05:01,817 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:05:01,817 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:05:01,818 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:05:01,818 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:05:01,818 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:05:01,818 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:05:01,818 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:05:01,818 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:05:01,824 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:05:01,824 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:05:01,824 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:05:01,824 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:05:01,825 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:05:01,825 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:05:01,825 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:05:01,825 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:05:01,826 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 00:05:01,827 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 00:05:01,827 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:05:01,827 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:05:01,828 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:05:01,828 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:05:01,828 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:05:01,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:05:01,829 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 00:05:01,829 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 00:05:01,829 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 00:05:01,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:05:01,830 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 00:05:01,830 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:05:01,830 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:05:01,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:05:01,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:05:01,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:05:01,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:05:01,831 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:05:01,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:05:01,832 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:05:01,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:05:01,832 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:05:01,833 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_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 [2022-11-26 00:05:02,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:05:02,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:05:02,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:05:02,207 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:05:02,208 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:05:02,209 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2022-11-26 00:05:05,346 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:05:05,601 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:05:05,602 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2022-11-26 00:05:05,608 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/data/512c5ad4f/483d03202cdb4a38b0b25d96db11f5fe/FLAG9e434f94c [2022-11-26 00:05:05,624 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/data/512c5ad4f/483d03202cdb4a38b0b25d96db11f5fe [2022-11-26 00:05:05,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:05:05,635 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:05:05,636 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:05:05,636 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:05:05,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:05:05,642 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:05:05" (1/1) ... [2022-11-26 00:05:05,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d9afd8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:05, skipping insertion in model container [2022-11-26 00:05:05,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:05:05" (1/1) ... [2022-11-26 00:05:05,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:05:05,694 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:05:05,957 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:05,959 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:05,964 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:05,968 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:05,969 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:05,972 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:05,976 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:05,977 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:05,978 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:05,979 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:05,979 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:05,988 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:05,990 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:05,993 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:05,994 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:05,998 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:05,999 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:06,001 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:06,008 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:06,008 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:06,009 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:06,010 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:06,011 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:06,011 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:06,029 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_577eab28-96a8-4d3e-af3a-e3d5c65a2010/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2022-11-26 00:05:06,052 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:05:06,063 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-26 00:05:06,064 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@bece08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:06, skipping insertion in model container [2022-11-26 00:05:06,064 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:05:06,064 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-26 00:05:06,066 INFO L158 Benchmark]: Toolchain (without parser) took 430.85ms. Allocated memory is still 157.3MB. Free memory was 118.1MB in the beginning and 125.9MB in the end (delta: -7.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-26 00:05:06,067 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 113.2MB. Free memory is still 82.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:05:06,068 INFO L158 Benchmark]: CACSL2BoogieTranslator took 428.23ms. Allocated memory is still 157.3MB. Free memory was 118.1MB in the beginning and 125.9MB in the end (delta: -7.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-26 00:05:06,069 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 113.2MB. Free memory is still 82.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 428.23ms. Allocated memory is still 157.3MB. Free memory was 118.1MB in the beginning and 125.9MB in the end (delta: -7.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 159]: 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_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur --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 c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 --- 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-38b53e6 [2022-11-26 00:05:08,448 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:05:08,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:05:08,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:05:08,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:05:08,493 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:05:08,497 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:05:08,500 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:05:08,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:05:08,508 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:05:08,509 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:05:08,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:05:08,512 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:05:08,515 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:05:08,516 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:05:08,523 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:05:08,524 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:05:08,525 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:05:08,527 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:05:08,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:05:08,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:05:08,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:05:08,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:05:08,538 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:05:08,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:05:08,549 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:05:08,549 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:05:08,551 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:05:08,552 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:05:08,553 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:05:08,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:05:08,554 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:05:08,556 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:05:08,570 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:05:08,571 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:05:08,572 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:05:08,573 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:05:08,573 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:05:08,573 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:05:08,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:05:08,575 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:05:08,576 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-26 00:05:08,620 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:05:08,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:05:08,622 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:05:08,622 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:05:08,623 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:05:08,623 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:05:08,624 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:05:08,624 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:05:08,624 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:05:08,624 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:05:08,625 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:05:08,626 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:05:08,626 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 00:05:08,627 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 00:05:08,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:05:08,627 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:05:08,627 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:05:08,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:05:08,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:05:08,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:05:08,628 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 00:05:08,628 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 00:05:08,629 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 00:05:08,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:05:08,629 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 00:05:08,629 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-26 00:05:08,630 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-26 00:05:08,630 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:05:08,630 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:05:08,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:05:08,630 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-26 00:05:08,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:05:08,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:05:08,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:05:08,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:05:08,632 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-26 00:05:08,632 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-26 00:05:08,632 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:05:08,632 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-26 00:05:08,633 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_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 [2022-11-26 00:05:09,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:05:09,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:05:09,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:05:09,108 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:05:09,111 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:05:09,112 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2022-11-26 00:05:12,185 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:05:12,469 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:05:12,471 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2022-11-26 00:05:12,480 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/data/f10918214/33bcd4520f1a4e41bcfbe1fc668e22f6/FLAG0dff4344e [2022-11-26 00:05:12,492 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/data/f10918214/33bcd4520f1a4e41bcfbe1fc668e22f6 [2022-11-26 00:05:12,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:05:12,496 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:05:12,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:05:12,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:05:12,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:05:12,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:05:12" (1/1) ... [2022-11-26 00:05:12,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fe3ab77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:12, skipping insertion in model container [2022-11-26 00:05:12,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:05:12" (1/1) ... [2022-11-26 00:05:12,514 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:05:12,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:05:12,755 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,757 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,758 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,763 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,764 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,765 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,770 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,771 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,771 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,773 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,773 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,781 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,782 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,786 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,787 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,791 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,791 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,794 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,796 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,798 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,799 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,807 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,808 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,809 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,819 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_577eab28-96a8-4d3e-af3a-e3d5c65a2010/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2022-11-26 00:05:12,844 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:05:12,864 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-26 00:05:12,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:05:12,888 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,889 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,889 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,893 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,893 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,896 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,897 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,899 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,899 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,905 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,907 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,908 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,909 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,910 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,913 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,914 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,915 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,915 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,917 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,918 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,919 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,920 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,921 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,922 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,927 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_577eab28-96a8-4d3e-af3a-e3d5c65a2010/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2022-11-26 00:05:12,942 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:05:12,953 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:05:12,973 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,974 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,974 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,977 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,977 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,978 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,979 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,980 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,980 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,983 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,984 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,992 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,995 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:12,997 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:12,998 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:13,000 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:13,001 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:13,002 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:13,004 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:13,004 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:13,006 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:13,007 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:13,008 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:05:13,009 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:05:13,019 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_577eab28-96a8-4d3e-af3a-e3d5c65a2010/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2022-11-26 00:05:13,023 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:05:13,041 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:05:13,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:13 WrapperNode [2022-11-26 00:05:13,043 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:05:13,044 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:05:13,044 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:05:13,045 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:05:13,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:13" (1/1) ... [2022-11-26 00:05:13,086 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:13" (1/1) ... [2022-11-26 00:05:13,144 INFO L138 Inliner]: procedures = 28, calls = 75, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 302 [2022-11-26 00:05:13,148 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:05:13,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:05:13,150 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:05:13,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:05:13,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:13" (1/1) ... [2022-11-26 00:05:13,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:13" (1/1) ... [2022-11-26 00:05:13,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:13" (1/1) ... [2022-11-26 00:05:13,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:13" (1/1) ... [2022-11-26 00:05:13,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:13" (1/1) ... [2022-11-26 00:05:13,214 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:13" (1/1) ... [2022-11-26 00:05:13,220 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:13" (1/1) ... [2022-11-26 00:05:13,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:13" (1/1) ... [2022-11-26 00:05:13,236 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:05:13,237 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:05:13,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:05:13,239 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:05:13,240 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:13" (1/1) ... [2022-11-26 00:05:13,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:05:13,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:05:13,334 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:05:13,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:05:13,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:05:13,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-26 00:05:13,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:05:13,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-26 00:05:13,397 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-26 00:05:13,397 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-26 00:05:13,398 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-26 00:05:13,398 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-26 00:05:13,398 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-26 00:05:13,398 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-26 00:05:13,398 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-26 00:05:13,398 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-26 00:05:13,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-26 00:05:13,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-26 00:05:13,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 00:05:13,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:05:13,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:05:13,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:05:13,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-26 00:05:13,401 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-26 00:05:13,533 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:05:13,535 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:05:14,437 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:05:14,717 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:05:14,717 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-26 00:05:14,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:05:14 BoogieIcfgContainer [2022-11-26 00:05:14,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:05:14,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:05:14,724 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:05:14,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:05:14,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:05:12" (1/3) ... [2022-11-26 00:05:14,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de3cbe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:05:14, skipping insertion in model container [2022-11-26 00:05:14,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:13" (2/3) ... [2022-11-26 00:05:14,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de3cbe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:05:14, skipping insertion in model container [2022-11-26 00:05:14,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:05:14" (3/3) ... [2022-11-26 00:05:14,733 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2022-11-26 00:05:14,753 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:05:14,754 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-11-26 00:05:14,755 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-26 00:05:14,848 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-26 00:05:14,901 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-26 00:05:14,927 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 260 places, 266 transitions, 564 flow [2022-11-26 00:05:14,932 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 260 places, 266 transitions, 564 flow [2022-11-26 00:05:14,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 260 places, 266 transitions, 564 flow [2022-11-26 00:05:15,072 INFO L130 PetriNetUnfolder]: 19/262 cut-off events. [2022-11-26 00:05:15,072 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-26 00:05:15,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 262 events. 19/262 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 211 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 210. Up to 2 conditions per place. [2022-11-26 00:05:15,085 INFO L119 LiptonReduction]: Number of co-enabled transitions 3160 [2022-11-26 00:05:53,494 WARN L233 SmtUtils]: Spent 8.71s on a formula simplification. DAG size of input: 163 DAG size of output: 162 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-26 00:06:07,229 WARN L233 SmtUtils]: Spent 11.99s on a formula simplification. DAG size of input: 166 DAG size of output: 165 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-26 00:06:08,976 INFO L134 LiptonReduction]: Checked pairs total: 6187 [2022-11-26 00:06:08,977 INFO L136 LiptonReduction]: Total number of compositions: 275 [2022-11-26 00:06:08,984 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 76 places, 69 transitions, 170 flow [2022-11-26 00:06:09,278 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 5221 states, 4815 states have (on average 4.821391484942887) internal successors, (23215), 5220 states have internal predecessors, (23215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:09,301 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:06:09,307 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;@57229dbc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:06:09,307 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2022-11-26 00:06:09,329 INFO L276 IsEmpty]: Start isEmpty. Operand has 5221 states, 4815 states have (on average 4.821391484942887) internal successors, (23215), 5220 states have internal predecessors, (23215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:09,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-26 00:06:09,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:09,337 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-26 00:06:09,338 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-26 00:06:09,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:09,345 INFO L85 PathProgramCache]: Analyzing trace with hash 40034, now seen corresponding path program 1 times [2022-11-26 00:06:09,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:06:09,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771224556] [2022-11-26 00:06:09,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:09,359 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 [2022-11-26 00:06:09,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:06:09,371 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 00:06:09,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:06:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:09,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:06:09,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:09,872 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-26 00:06:09,873 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-26 00:06:09,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:09,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:06:09,934 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:06:09,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771224556] [2022-11-26 00:06:09,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771224556] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:06:09,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:06:09,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:06:09,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945117430] [2022-11-26 00:06:09,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:06:09,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:06:09,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:06:09,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:06:09,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:06:09,997 INFO L87 Difference]: Start difference. First operand has 5221 states, 4815 states have (on average 4.821391484942887) internal successors, (23215), 5220 states have internal predecessors, (23215), 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) [2022-11-26 00:06:10,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:10,397 INFO L93 Difference]: Finished difference Result 5218 states and 23212 transitions. [2022-11-26 00:06:10,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:06:10,400 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 [2022-11-26 00:06:10,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:10,469 INFO L225 Difference]: With dead ends: 5218 [2022-11-26 00:06:10,469 INFO L226 Difference]: Without dead ends: 5218 [2022-11-26 00:06:10,470 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 [2022-11-26 00:06:10,473 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 59 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:10,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 6 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:06:10,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5218 states. [2022-11-26 00:06:10,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5218 to 5218. [2022-11-26 00:06:10,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5218 states, 4815 states have (on average 4.820768431983385) internal successors, (23212), 5217 states have internal predecessors, (23212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:11,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5218 states to 5218 states and 23212 transitions. [2022-11-26 00:06:11,020 INFO L78 Accepts]: Start accepts. Automaton has 5218 states and 23212 transitions. Word has length 2 [2022-11-26 00:06:11,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:11,021 INFO L495 AbstractCegarLoop]: Abstraction has 5218 states and 23212 transitions. [2022-11-26 00:06:11,022 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) [2022-11-26 00:06:11,022 INFO L276 IsEmpty]: Start isEmpty. Operand 5218 states and 23212 transitions. [2022-11-26 00:06:11,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-26 00:06:11,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:11,023 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-26 00:06:11,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:06:11,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:06:11,224 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-26 00:06:11,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:11,225 INFO L85 PathProgramCache]: Analyzing trace with hash 40035, now seen corresponding path program 1 times [2022-11-26 00:06:11,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:06:11,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626209564] [2022-11-26 00:06:11,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:11,226 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 [2022-11-26 00:06:11,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:06:11,228 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 00:06:11,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:06:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:11,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:06:11,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:11,640 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-26 00:06:11,640 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-26 00:06:11,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:11,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:06:11,715 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:06:11,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626209564] [2022-11-26 00:06:11,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626209564] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:06:11,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:06:11,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:06:11,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483699842] [2022-11-26 00:06:11,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:06:11,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:06:11,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:06:11,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:06:11,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:06:11,717 INFO L87 Difference]: Start difference. First operand 5218 states and 23212 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) [2022-11-26 00:06:12,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:12,758 INFO L93 Difference]: Finished difference Result 10433 states and 46421 transitions. [2022-11-26 00:06:12,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:06:12,758 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 [2022-11-26 00:06:12,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:13,031 INFO L225 Difference]: With dead ends: 10433 [2022-11-26 00:06:13,031 INFO L226 Difference]: Without dead ends: 10433 [2022-11-26 00:06:13,032 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 [2022-11-26 00:06:13,036 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:13,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 12 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:06:13,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10433 states. [2022-11-26 00:06:13,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10433 to 5220. [2022-11-26 00:06:13,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5220 states, 4817 states have (on average 4.820012455885406) internal successors, (23218), 5219 states have internal predecessors, (23218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:13,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5220 states to 5220 states and 23218 transitions. [2022-11-26 00:06:13,474 INFO L78 Accepts]: Start accepts. Automaton has 5220 states and 23218 transitions. Word has length 2 [2022-11-26 00:06:13,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:13,474 INFO L495 AbstractCegarLoop]: Abstraction has 5220 states and 23218 transitions. [2022-11-26 00:06:13,475 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) [2022-11-26 00:06:13,475 INFO L276 IsEmpty]: Start isEmpty. Operand 5220 states and 23218 transitions. [2022-11-26 00:06:13,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-26 00:06:13,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:13,476 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-26 00:06:13,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:06:13,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:06:13,687 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-26 00:06:13,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:13,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1247856, now seen corresponding path program 1 times [2022-11-26 00:06:13,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:06:13,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13820126] [2022-11-26 00:06:13,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:13,688 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 [2022-11-26 00:06:13,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:06:13,690 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 00:06:13,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:06:13,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:13,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-26 00:06:13,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:13,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:14,022 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2022-11-26 00:06:14,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2022-11-26 00:06:14,588 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-26 00:06:14,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2022-11-26 00:06:14,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:14,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:06:14,672 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:06:14,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [13820126] [2022-11-26 00:06:14,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [13820126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:06:14,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:06:14,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:06:14,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27712033] [2022-11-26 00:06:14,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:06:14,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:06:14,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:06:14,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:06:14,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:06:14,674 INFO L87 Difference]: Start difference. First operand 5220 states and 23218 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:15,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:15,225 INFO L93 Difference]: Finished difference Result 4319 states and 18716 transitions. [2022-11-26 00:06:15,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:06:15,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 [2022-11-26 00:06:15,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:15,263 INFO L225 Difference]: With dead ends: 4319 [2022-11-26 00:06:15,263 INFO L226 Difference]: Without dead ends: 4319 [2022-11-26 00:06:15,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:06:15,275 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 57 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:15,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 6 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:06:15,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4319 states. [2022-11-26 00:06:15,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4319 to 4319. [2022-11-26 00:06:15,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4319 states, 3998 states have (on average 4.681340670335167) internal successors, (18716), 4318 states have internal predecessors, (18716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:15,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4319 states to 4319 states and 18716 transitions. [2022-11-26 00:06:15,599 INFO L78 Accepts]: Start accepts. Automaton has 4319 states and 18716 transitions. Word has length 3 [2022-11-26 00:06:15,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:15,599 INFO L495 AbstractCegarLoop]: Abstraction has 4319 states and 18716 transitions. [2022-11-26 00:06:15,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:15,600 INFO L276 IsEmpty]: Start isEmpty. Operand 4319 states and 18716 transitions. [2022-11-26 00:06:15,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-26 00:06:15,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:15,602 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-26 00:06:15,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:06:15,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:06:15,814 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-26 00:06:15,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:15,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1247857, now seen corresponding path program 1 times [2022-11-26 00:06:15,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:06:15,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668240987] [2022-11-26 00:06:15,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:15,815 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 [2022-11-26 00:06:15,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:06:15,817 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 00:06:15,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:06:15,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:15,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:06:15,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:16,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:16,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:16,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:16,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:16,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:16,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:16,229 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-11-26 00:06:16,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2022-11-26 00:06:16,301 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2022-11-26 00:06:16,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 149 treesize of output 146 [2022-11-26 00:06:16,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:16,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-26 00:06:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:16,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:06:16,478 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:06:16,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668240987] [2022-11-26 00:06:16,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668240987] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:06:16,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:06:16,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:06:16,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69617682] [2022-11-26 00:06:16,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:06:16,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:06:16,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:06:16,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:06:16,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:06:16,481 INFO L87 Difference]: Start difference. First operand 4319 states and 18716 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:16,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:16,860 INFO L93 Difference]: Finished difference Result 3418 states and 14214 transitions. [2022-11-26 00:06:16,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:06:16,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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 [2022-11-26 00:06:16,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:16,881 INFO L225 Difference]: With dead ends: 3418 [2022-11-26 00:06:16,881 INFO L226 Difference]: Without dead ends: 3418 [2022-11-26 00:06:16,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:06:16,882 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:16,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 6 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:06:16,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3418 states. [2022-11-26 00:06:16,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3418 to 3418. [2022-11-26 00:06:16,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3418 states, 3179 states have (on average 4.471217363950928) internal successors, (14214), 3417 states have internal predecessors, (14214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:17,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3418 states to 3418 states and 14214 transitions. [2022-11-26 00:06:17,005 INFO L78 Accepts]: Start accepts. Automaton has 3418 states and 14214 transitions. Word has length 3 [2022-11-26 00:06:17,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:17,005 INFO L495 AbstractCegarLoop]: Abstraction has 3418 states and 14214 transitions. [2022-11-26 00:06:17,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:17,006 INFO L276 IsEmpty]: Start isEmpty. Operand 3418 states and 14214 transitions. [2022-11-26 00:06:17,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-26 00:06:17,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:17,006 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-26 00:06:17,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:06:17,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:06:17,218 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-26 00:06:17,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:17,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1245873, now seen corresponding path program 1 times [2022-11-26 00:06:17,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:06:17,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671394753] [2022-11-26 00:06:17,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:17,219 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 [2022-11-26 00:06:17,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:06:17,222 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 00:06:17,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:06:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:17,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:06:17,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:17,547 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-26 00:06:17,548 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-26 00:06:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:17,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:06:17,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:17,882 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:06:17,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1671394753] [2022-11-26 00:06:17,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1671394753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:06:17,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [632369181] [2022-11-26 00:06:17,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:17,882 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:06:17,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:06:17,889 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:06:17,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-26 00:06:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:18,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:06:18,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:18,270 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-26 00:06:18,271 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-26 00:06:18,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:18,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:06:18,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:18,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [632369181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:06:18,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443405450] [2022-11-26 00:06:18,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:18,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:18,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:06:18,412 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:06:18,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:06:18,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:18,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:06:18,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:18,768 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-26 00:06:18,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-26 00:06:18,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:18,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:06:18,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:18,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443405450] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:06:18,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:06:18,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-26 00:06:18,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562226255] [2022-11-26 00:06:18,996 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:06:18,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:06:18,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:06:18,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:06:18,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:06:18,999 INFO L87 Difference]: Start difference. First operand 3418 states and 14214 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) [2022-11-26 00:06:22,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:22,115 INFO L93 Difference]: Finished difference Result 13657 states and 56835 transitions. [2022-11-26 00:06:22,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:06:22,116 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 [2022-11-26 00:06:22,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:22,242 INFO L225 Difference]: With dead ends: 13657 [2022-11-26 00:06:22,242 INFO L226 Difference]: Without dead ends: 13657 [2022-11-26 00:06:22,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:06:22,244 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 560 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:22,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 30 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-26 00:06:22,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13657 states. [2022-11-26 00:06:22,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13657 to 3424. [2022-11-26 00:06:22,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3424 states, 3185 states have (on average 4.466562009419152) internal successors, (14226), 3423 states have internal predecessors, (14226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:22,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3424 states to 3424 states and 14226 transitions. [2022-11-26 00:06:22,683 INFO L78 Accepts]: Start accepts. Automaton has 3424 states and 14226 transitions. Word has length 3 [2022-11-26 00:06:22,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:22,684 INFO L495 AbstractCegarLoop]: Abstraction has 3424 states and 14226 transitions. [2022-11-26 00:06:22,684 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) [2022-11-26 00:06:22,684 INFO L276 IsEmpty]: Start isEmpty. Operand 3424 states and 14226 transitions. [2022-11-26 00:06:22,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:06:22,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:22,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:06:22,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:22,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:23,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:06:23,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:06:23,289 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-26 00:06:23,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:23,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1199219144, now seen corresponding path program 1 times [2022-11-26 00:06:23,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:06:23,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828357049] [2022-11-26 00:06:23,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:23,290 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 [2022-11-26 00:06:23,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:06:23,292 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 00:06:23,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:06:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:23,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-26 00:06:23,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:23,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:23,607 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-26 00:06:23,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-26 00:06:24,696 INFO L321 Elim1Store]: treesize reduction 58, result has 27.5 percent of original size [2022-11-26 00:06:24,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 44 [2022-11-26 00:06:25,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:25,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:06:25,072 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:06:25,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828357049] [2022-11-26 00:06:25,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828357049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:06:25,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:06:25,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:06:25,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136693025] [2022-11-26 00:06:25,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:06:25,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:06:25,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:06:25,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:06:25,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:06:25,074 INFO L87 Difference]: Start difference. First operand 3424 states and 14226 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:25,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:25,525 INFO L93 Difference]: Finished difference Result 3239 states and 13496 transitions. [2022-11-26 00:06:25,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:06:25,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-26 00:06:25,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:25,549 INFO L225 Difference]: With dead ends: 3239 [2022-11-26 00:06:25,549 INFO L226 Difference]: Without dead ends: 3239 [2022-11-26 00:06:25,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:06:25,550 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 51 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:25,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 6 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:06:25,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3239 states. [2022-11-26 00:06:25,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3239 to 3239. [2022-11-26 00:06:25,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3239 states, 3030 states have (on average 4.454125412541254) internal successors, (13496), 3238 states have internal predecessors, (13496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:25,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3239 states to 3239 states and 13496 transitions. [2022-11-26 00:06:25,761 INFO L78 Accepts]: Start accepts. Automaton has 3239 states and 13496 transitions. Word has length 5 [2022-11-26 00:06:25,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:25,761 INFO L495 AbstractCegarLoop]: Abstraction has 3239 states and 13496 transitions. [2022-11-26 00:06:25,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:25,762 INFO L276 IsEmpty]: Start isEmpty. Operand 3239 states and 13496 transitions. [2022-11-26 00:06:25,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:06:25,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:25,763 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:06:25,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:25,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:06:25,980 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-26 00:06:25,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:25,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1199219145, now seen corresponding path program 1 times [2022-11-26 00:06:25,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:06:25,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1695409531] [2022-11-26 00:06:25,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:25,981 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 [2022-11-26 00:06:25,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:06:25,982 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 00:06:25,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:06:26,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:26,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:06:26,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:26,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:26,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:26,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:26,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:26,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:26,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:26,324 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-11-26 00:06:26,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2022-11-26 00:06:26,362 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-26 00:06:26,363 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 31 treesize of output 27 [2022-11-26 00:06:26,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:26,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-26 00:06:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:26,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:06:26,508 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:06:26,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1695409531] [2022-11-26 00:06:26,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1695409531] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:06:26,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:06:26,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:06:26,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552298219] [2022-11-26 00:06:26,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:06:26,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:06:26,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:06:26,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:06:26,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:06:26,510 INFO L87 Difference]: Start difference. First operand 3239 states and 13496 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) [2022-11-26 00:06:26,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:26,799 INFO L93 Difference]: Finished difference Result 3054 states and 12766 transitions. [2022-11-26 00:06:26,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:06:26,800 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 [2022-11-26 00:06:26,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:26,819 INFO L225 Difference]: With dead ends: 3054 [2022-11-26 00:06:26,819 INFO L226 Difference]: Without dead ends: 3054 [2022-11-26 00:06:26,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:06:26,821 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 51 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:26,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 6 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:06:26,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3054 states. [2022-11-26 00:06:26,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3054 to 3054. [2022-11-26 00:06:26,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3054 states, 2875 states have (on average 4.440347826086956) internal successors, (12766), 3053 states have internal predecessors, (12766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:26,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3054 states to 3054 states and 12766 transitions. [2022-11-26 00:06:26,954 INFO L78 Accepts]: Start accepts. Automaton has 3054 states and 12766 transitions. Word has length 5 [2022-11-26 00:06:26,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:26,955 INFO L495 AbstractCegarLoop]: Abstraction has 3054 states and 12766 transitions. [2022-11-26 00:06:26,955 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) [2022-11-26 00:06:26,955 INFO L276 IsEmpty]: Start isEmpty. Operand 3054 states and 12766 transitions. [2022-11-26 00:06:26,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:06:26,956 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:26,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:06:26,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:27,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:06:27,169 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-26 00:06:27,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:27,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1478919340, now seen corresponding path program 1 times [2022-11-26 00:06:27,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:06:27,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824717239] [2022-11-26 00:06:27,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:27,170 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 [2022-11-26 00:06:27,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:06:27,172 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 00:06:27,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:06:27,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:27,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:06:27,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:27,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:06:27,373 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:06:27,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1824717239] [2022-11-26 00:06:27,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1824717239] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:06:27,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:06:27,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:06:27,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011478053] [2022-11-26 00:06:27,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:06:27,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:06:27,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:06:27,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:06:27,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:06:27,376 INFO L87 Difference]: Start difference. First operand 3054 states and 12766 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2022-11-26 00:06:27,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:27,894 INFO L93 Difference]: Finished difference Result 4125 states and 16520 transitions. [2022-11-26 00:06:27,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:06:27,895 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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 [2022-11-26 00:06:27,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:27,912 INFO L225 Difference]: With dead ends: 4125 [2022-11-26 00:06:27,912 INFO L226 Difference]: Without dead ends: 4125 [2022-11-26 00:06:27,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:06:27,913 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 39 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:27,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 18 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:06:27,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4125 states. [2022-11-26 00:06:28,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4125 to 3924. [2022-11-26 00:06:28,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3745 states have (on average 4.283578104138852) internal successors, (16042), 3923 states have internal predecessors, (16042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:28,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16042 transitions. [2022-11-26 00:06:28,089 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16042 transitions. Word has length 6 [2022-11-26 00:06:28,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:28,090 INFO L495 AbstractCegarLoop]: Abstraction has 3924 states and 16042 transitions. [2022-11-26 00:06:28,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2022-11-26 00:06:28,090 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16042 transitions. [2022-11-26 00:06:28,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:06:28,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:28,091 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-26 00:06:28,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:28,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:06:28,303 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-26 00:06:28,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:28,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1534148637, now seen corresponding path program 2 times [2022-11-26 00:06:28,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:06:28,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [17187025] [2022-11-26 00:06:28,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:06:28,305 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:06:28,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:06:28,306 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 00:06:28,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:06:28,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:06:28,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:06:28,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:06:28,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:28,665 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-26 00:06:28,665 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-26 00:06:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:28,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:06:29,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:29,681 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:06:29,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [17187025] [2022-11-26 00:06:29,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [17187025] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:06:29,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [970524375] [2022-11-26 00:06:29,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:06:29,682 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:06:29,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:06:29,683 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:06:29,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-26 00:06:29,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:06:29,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:06:29,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:06:29,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:30,198 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-26 00:06:30,199 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-26 00:06:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:30,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:06:30,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:30,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [970524375] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:06:30,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920763114] [2022-11-26 00:06:30,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:06:30,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:30,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:06:30,534 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:06:30,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:06:30,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:06:30,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:06:30,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:06:30,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:30,973 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-26 00:06:30,973 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-26 00:06:31,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:31,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:06:31,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:31,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920763114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:06:31,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:06:31,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2022-11-26 00:06:31,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836151430] [2022-11-26 00:06:31,247 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:06:31,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:06:31,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:06:31,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:06:31,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:06:31,248 INFO L87 Difference]: Start difference. First operand 3924 states and 16042 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) [2022-11-26 00:06:33,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:06:35,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:06:36,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:06:38,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:06:42,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:06:47,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:47,012 INFO L93 Difference]: Finished difference Result 35188 states and 144138 transitions. [2022-11-26 00:06:47,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:06:47,013 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 [2022-11-26 00:06:47,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:47,196 INFO L225 Difference]: With dead ends: 35188 [2022-11-26 00:06:47,196 INFO L226 Difference]: Without dead ends: 35188 [2022-11-26 00:06:47,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:06:47,197 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1034 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 49 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:47,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1034 Valid, 174 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1295 Invalid, 1 Unknown, 0 Unchecked, 14.1s Time] [2022-11-26 00:06:47,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35188 states. [2022-11-26 00:06:47,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35188 to 3940. [2022-11-26 00:06:47,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3940 states, 3761 states have (on average 4.273863334219622) internal successors, (16074), 3939 states have internal predecessors, (16074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:47,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3940 states to 3940 states and 16074 transitions. [2022-11-26 00:06:47,862 INFO L78 Accepts]: Start accepts. Automaton has 3940 states and 16074 transitions. Word has length 6 [2022-11-26 00:06:47,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:47,862 INFO L495 AbstractCegarLoop]: Abstraction has 3940 states and 16074 transitions. [2022-11-26 00:06:47,862 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) [2022-11-26 00:06:47,863 INFO L276 IsEmpty]: Start isEmpty. Operand 3940 states and 16074 transitions. [2022-11-26 00:06:47,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:06:47,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:47,864 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:06:47,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:48,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:48,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:48,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:06:48,468 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-26 00:06:48,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:48,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1398391452, now seen corresponding path program 1 times [2022-11-26 00:06:48,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:06:48,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [953160613] [2022-11-26 00:06:48,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:48,469 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 [2022-11-26 00:06:48,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:06:48,470 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 00:06:48,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-26 00:06:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:48,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:06:48,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:48,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:48,758 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-26 00:06:48,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-26 00:06:48,867 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:06:48,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 00:06:48,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:48,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:06:48,990 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:06:48,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [953160613] [2022-11-26 00:06:48,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [953160613] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:06:48,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:06:48,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:06:48,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048737904] [2022-11-26 00:06:48,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:06:48,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:06:48,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:06:48,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:06:48,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:06:48,992 INFO L87 Difference]: Start difference. First operand 3940 states and 16074 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-11-26 00:06:49,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:49,255 INFO L93 Difference]: Finished difference Result 3857 states and 15820 transitions. [2022-11-26 00:06:49,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:06:49,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 [2022-11-26 00:06:49,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:49,268 INFO L225 Difference]: With dead ends: 3857 [2022-11-26 00:06:49,268 INFO L226 Difference]: Without dead ends: 3857 [2022-11-26 00:06:49,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:06:49,268 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 45 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:49,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 6 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:06:49,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3857 states. [2022-11-26 00:06:49,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3857 to 3857. [2022-11-26 00:06:49,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3857 states, 3696 states have (on average 4.28030303030303) internal successors, (15820), 3856 states have internal predecessors, (15820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:49,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3857 states to 3857 states and 15820 transitions. [2022-11-26 00:06:49,387 INFO L78 Accepts]: Start accepts. Automaton has 3857 states and 15820 transitions. Word has length 7 [2022-11-26 00:06:49,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:49,388 INFO L495 AbstractCegarLoop]: Abstraction has 3857 states and 15820 transitions. [2022-11-26 00:06:49,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-11-26 00:06:49,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3857 states and 15820 transitions. [2022-11-26 00:06:49,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:06:49,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:49,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:06:49,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:49,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:06:49,599 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-26 00:06:49,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:49,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1398391454, now seen corresponding path program 1 times [2022-11-26 00:06:49,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:06:49,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130372402] [2022-11-26 00:06:49,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:49,600 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 [2022-11-26 00:06:49,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:06:49,602 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 00:06:49,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:06:49,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:49,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:06:49,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:49,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:49,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:49,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:49,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:50,040 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-26 00:06:50,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-26 00:06:50,064 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 18 treesize of output 16 [2022-11-26 00:06:50,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:50,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-26 00:06:50,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:50,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:06:50,236 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:06:50,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130372402] [2022-11-26 00:06:50,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130372402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:06:50,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:06:50,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:06:50,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050464834] [2022-11-26 00:06:50,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:06:50,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:06:50,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:06:50,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:06:50,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:06:50,238 INFO L87 Difference]: Start difference. First operand 3857 states and 15820 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2022-11-26 00:06:50,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:50,515 INFO L93 Difference]: Finished difference Result 3774 states and 15566 transitions. [2022-11-26 00:06:50,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:06:50,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 [2022-11-26 00:06:50,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:50,533 INFO L225 Difference]: With dead ends: 3774 [2022-11-26 00:06:50,533 INFO L226 Difference]: Without dead ends: 3774 [2022-11-26 00:06:50,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:06:50,534 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 47 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:50,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 6 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:06:50,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3774 states. [2022-11-26 00:06:50,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3774 to 3774. [2022-11-26 00:06:50,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3774 states, 3631 states have (on average 4.286973285596255) internal successors, (15566), 3773 states have internal predecessors, (15566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:50,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3774 states to 3774 states and 15566 transitions. [2022-11-26 00:06:50,654 INFO L78 Accepts]: Start accepts. Automaton has 3774 states and 15566 transitions. Word has length 7 [2022-11-26 00:06:50,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:50,654 INFO L495 AbstractCegarLoop]: Abstraction has 3774 states and 15566 transitions. [2022-11-26 00:06:50,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2022-11-26 00:06:50,654 INFO L276 IsEmpty]: Start isEmpty. Operand 3774 states and 15566 transitions. [2022-11-26 00:06:50,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:06:50,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:50,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:06:50,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:06:50,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:06:50,868 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-26 00:06:50,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:50,868 INFO L85 PathProgramCache]: Analyzing trace with hash -258733406, now seen corresponding path program 1 times [2022-11-26 00:06:50,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:06:50,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727680732] [2022-11-26 00:06:50,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:50,869 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 [2022-11-26 00:06:50,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:06:50,870 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 00:06:50,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:06:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:51,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:06:51,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:51,200 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-26 00:06:51,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-26 00:06:51,248 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:06:51,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-26 00:06:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:06:51,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:06:51,263 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:06:51,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727680732] [2022-11-26 00:06:51,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727680732] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:06:51,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:06:51,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:06:51,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714609604] [2022-11-26 00:06:51,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:06:51,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:06:51,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:06:51,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:06:51,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:06:51,265 INFO L87 Difference]: Start difference. First operand 3774 states and 15566 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2022-11-26 00:06:51,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:51,476 INFO L93 Difference]: Finished difference Result 2890 states and 11756 transitions. [2022-11-26 00:06:51,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:06:51,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 [2022-11-26 00:06:51,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:51,488 INFO L225 Difference]: With dead ends: 2890 [2022-11-26 00:06:51,488 INFO L226 Difference]: Without dead ends: 2890 [2022-11-26 00:06:51,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:06:51,489 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 84 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:51,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 6 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:06:51,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2890 states. [2022-11-26 00:06:51,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2890 to 2890. [2022-11-26 00:06:51,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2890 states, 2822 states have (on average 4.165839829907867) internal successors, (11756), 2889 states have internal predecessors, (11756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:51,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2890 states to 2890 states and 11756 transitions. [2022-11-26 00:06:51,572 INFO L78 Accepts]: Start accepts. Automaton has 2890 states and 11756 transitions. Word has length 7 [2022-11-26 00:06:51,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:51,572 INFO L495 AbstractCegarLoop]: Abstraction has 2890 states and 11756 transitions. [2022-11-26 00:06:51,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2022-11-26 00:06:51,572 INFO L276 IsEmpty]: Start isEmpty. Operand 2890 states and 11756 transitions. [2022-11-26 00:06:51,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:06:51,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:51,573 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:06:51,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:51,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:06:51,785 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-26 00:06:51,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:51,786 INFO L85 PathProgramCache]: Analyzing trace with hash -258733405, now seen corresponding path program 1 times [2022-11-26 00:06:51,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:06:51,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276188437] [2022-11-26 00:06:51,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:51,786 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 [2022-11-26 00:06:51,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:06:51,789 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 00:06:51,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:06:51,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:51,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-26 00:06:51,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:52,227 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-26 00:06:52,227 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-26 00:06:52,489 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-26 00:06:52,489 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-26 00:06:52,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:52,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 00:06:52,663 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:06:52,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 00:06:52,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:52,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:06:55,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:55,187 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:06:55,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [276188437] [2022-11-26 00:06:55,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [276188437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:06:55,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1198069703] [2022-11-26 00:06:55,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:55,187 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:06:55,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:06:55,188 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:06:55,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-26 00:06:55,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:55,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:06:55,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:55,782 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-26 00:06:55,787 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-26 00:06:56,102 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-26 00:06:56,102 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-26 00:06:56,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:56,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 00:06:56,349 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:06:56,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 00:06:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:56,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:06:58,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:58,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1198069703] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:06:58,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418349909] [2022-11-26 00:06:58,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:58,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:58,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:06:58,190 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:06:58,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-26 00:06:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:58,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:06:58,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:58,619 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-26 00:06:58,619 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-26 00:06:58,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:58,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 00:06:58,774 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:06:58,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 00:06:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:58,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:07:02,352 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:07:02,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 89 [2022-11-26 00:07:05,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:07:05,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418349909] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:07:05,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:07:05,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 11 [2022-11-26 00:07:05,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889391079] [2022-11-26 00:07:05,923 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:07:05,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 00:07:05,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:07:05,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 00:07:05,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=106, Unknown=2, NotChecked=0, Total=156 [2022-11-26 00:07:05,924 INFO L87 Difference]: Start difference. First operand 2890 states and 11756 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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) [2022-11-26 00:07:43,273 WARN L233 SmtUtils]: Spent 37.15s on a formula simplification. DAG size of input: 72 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:07:45,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 00:07:47,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 00:08:00,197 WARN L233 SmtUtils]: Spent 12.26s on a formula simplification. DAG size of input: 69 DAG size of output: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:08:17,828 WARN L233 SmtUtils]: Spent 16.96s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:08:44,131 WARN L233 SmtUtils]: Spent 25.28s on a formula simplification. DAG size of input: 71 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:09:19,470 WARN L233 SmtUtils]: Spent 33.25s on a formula simplification. DAG size of input: 70 DAG size of output: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:09:44,299 WARN L233 SmtUtils]: Spent 19.64s on a formula simplification. DAG size of input: 60 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:09:56,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:09:56,998 INFO L93 Difference]: Finished difference Result 7844 states and 31736 transitions. [2022-11-26 00:09:57,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:09:57,001 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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 7 [2022-11-26 00:09:57,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:09:57,025 INFO L225 Difference]: With dead ends: 7844 [2022-11-26 00:09:57,026 INFO L226 Difference]: Without dead ends: 7844 [2022-11-26 00:09:57,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 164.5s TimeCoverageRelationStatistics Valid=118, Invalid=299, Unknown=3, NotChecked=0, Total=420 [2022-11-26 00:09:57,026 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 389 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 17 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:09:57,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 90 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 585 Invalid, 2 Unknown, 0 Unchecked, 16.5s Time] [2022-11-26 00:09:57,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7844 states. [2022-11-26 00:09:57,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7844 to 4033. [2022-11-26 00:09:57,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4033 states, 3965 states have (on average 4.234552332912989) internal successors, (16790), 4032 states have internal predecessors, (16790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:09:57,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4033 states to 4033 states and 16790 transitions. [2022-11-26 00:09:57,184 INFO L78 Accepts]: Start accepts. Automaton has 4033 states and 16790 transitions. Word has length 7 [2022-11-26 00:09:57,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:09:57,185 INFO L495 AbstractCegarLoop]: Abstraction has 4033 states and 16790 transitions. [2022-11-26 00:09:57,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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) [2022-11-26 00:09:57,185 INFO L276 IsEmpty]: Start isEmpty. Operand 4033 states and 16790 transitions. [2022-11-26 00:09:57,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 00:09:57,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:09:57,186 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:09:57,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-26 00:09:57,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-26 00:09:57,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-26 00:09:57,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 00:09:57,798 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-26 00:09:57,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:09:57,799 INFO L85 PathProgramCache]: Analyzing trace with hash 400455448, now seen corresponding path program 1 times [2022-11-26 00:09:57,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:09:57,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1203815392] [2022-11-26 00:09:57,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:09:57,799 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 [2022-11-26 00:09:57,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:09:57,800 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 00:09:57,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-26 00:09:57,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:09:57,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 00:09:57,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:09:57,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-26 00:09:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:09:57,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:09:57,965 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:09:57,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1203815392] [2022-11-26 00:09:57,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1203815392] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:09:57,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:09:57,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:09:57,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401612303] [2022-11-26 00:09:57,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:09:57,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:09:57,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:09:57,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:09:57,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:09:57,968 INFO L87 Difference]: Start difference. First operand 4033 states and 16790 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:09:58,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:09:58,275 INFO L93 Difference]: Finished difference Result 2853 states and 11756 transitions. [2022-11-26 00:09:58,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:09:58,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2022-11-26 00:09:58,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:09:58,288 INFO L225 Difference]: With dead ends: 2853 [2022-11-26 00:09:58,288 INFO L226 Difference]: Without dead ends: 2853 [2022-11-26 00:09:58,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:09:58,289 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 77 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:09:58,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 6 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:09:58,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2853 states. [2022-11-26 00:09:58,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2853 to 2853. [2022-11-26 00:09:58,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2853 states, 2815 states have (on average 4.17619893428064) internal successors, (11756), 2852 states have internal predecessors, (11756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:09:58,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 11756 transitions. [2022-11-26 00:09:58,376 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 11756 transitions. Word has length 8 [2022-11-26 00:09:58,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:09:58,376 INFO L495 AbstractCegarLoop]: Abstraction has 2853 states and 11756 transitions. [2022-11-26 00:09:58,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:09:58,376 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 11756 transitions. [2022-11-26 00:09:58,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 00:09:58,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:09:58,379 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:09:58,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-11-26 00:09:58,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:09:58,590 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-26 00:09:58,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:09:58,591 INFO L85 PathProgramCache]: Analyzing trace with hash 400455449, now seen corresponding path program 1 times [2022-11-26 00:09:58,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:09:58,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533489548] [2022-11-26 00:09:58,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:09:58,591 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 [2022-11-26 00:09:58,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:09:58,592 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 00:09:58,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:09:58,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:09:58,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:09:58,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:09:58,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:09:58,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:09:58,851 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:09:58,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533489548] [2022-11-26 00:09:58,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [533489548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:09:58,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:09:58,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:09:58,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144099602] [2022-11-26 00:09:58,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:09:58,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:09:58,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:09:58,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:09:58,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:09:58,853 INFO L87 Difference]: Start difference. First operand 2853 states and 11756 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:09:59,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:09:59,501 INFO L93 Difference]: Finished difference Result 4360 states and 17104 transitions. [2022-11-26 00:09:59,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:09:59,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2022-11-26 00:09:59,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:09:59,515 INFO L225 Difference]: With dead ends: 4360 [2022-11-26 00:09:59,515 INFO L226 Difference]: Without dead ends: 4360 [2022-11-26 00:09:59,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:09:59,516 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 63 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:09:59,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 18 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:09:59,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4360 states. [2022-11-26 00:09:59,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4360 to 4158. [2022-11-26 00:09:59,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4158 states, 4120 states have (on average 4.046359223300971) internal successors, (16671), 4157 states have internal predecessors, (16671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:09:59,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4158 states to 4158 states and 16671 transitions. [2022-11-26 00:09:59,620 INFO L78 Accepts]: Start accepts. Automaton has 4158 states and 16671 transitions. Word has length 8 [2022-11-26 00:09:59,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:09:59,621 INFO L495 AbstractCegarLoop]: Abstraction has 4158 states and 16671 transitions. [2022-11-26 00:09:59,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:09:59,621 INFO L276 IsEmpty]: Start isEmpty. Operand 4158 states and 16671 transitions. [2022-11-26 00:09:59,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 00:09:59,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:09:59,622 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:09:59,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-11-26 00:09:59,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:09:59,834 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-26 00:09:59,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:09:59,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1031102078, now seen corresponding path program 1 times [2022-11-26 00:09:59,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:09:59,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960083297] [2022-11-26 00:09:59,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:09:59,835 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 [2022-11-26 00:09:59,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:09:59,837 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 00:09:59,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:09:59,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:09:59,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 00:09:59,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:10:00,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:10:00,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:10:00,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:10:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:10:01,605 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:10:01,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1960083297] [2022-11-26 00:10:01,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1960083297] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:10:01,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1776982346] [2022-11-26 00:10:01,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:10:01,606 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:10:01,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:10:01,607 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:10:01,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-26 00:10:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:10:01,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:10:01,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:10:01,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:10:02,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:10:02,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:10:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:10:02,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1776982346] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:10:02,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615840927] [2022-11-26 00:10:02,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:10:02,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:10:02,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:10:02,631 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:10:02,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-26 00:10:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:10:02,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:10:02,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:10:02,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:10:02,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:10:02,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:10:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:10:03,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615840927] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:10:03,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:10:03,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 9 [2022-11-26 00:10:03,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355330527] [2022-11-26 00:10:03,361 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:10:03,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-26 00:10:03,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:10:03,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-26 00:10:03,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:10:03,363 INFO L87 Difference]: Start difference. First operand 4158 states and 16671 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 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) [2022-11-26 00:10:10,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:10:10,780 INFO L93 Difference]: Finished difference Result 8010 states and 32090 transitions. [2022-11-26 00:10:10,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 00:10:10,782 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 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 9 [2022-11-26 00:10:10,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:10:10,812 INFO L225 Difference]: With dead ends: 8010 [2022-11-26 00:10:10,812 INFO L226 Difference]: Without dead ends: 8010 [2022-11-26 00:10:10,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:10:10,813 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 451 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:10:10,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 47 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-26 00:10:10,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8010 states. [2022-11-26 00:10:11,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8010 to 5781. [2022-11-26 00:10:11,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5781 states, 5743 states have (on average 4.132160891520112) internal successors, (23731), 5780 states have internal predecessors, (23731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:10:11,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5781 states to 5781 states and 23731 transitions. [2022-11-26 00:10:11,080 INFO L78 Accepts]: Start accepts. Automaton has 5781 states and 23731 transitions. Word has length 9 [2022-11-26 00:10:11,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:10:11,081 INFO L495 AbstractCegarLoop]: Abstraction has 5781 states and 23731 transitions. [2022-11-26 00:10:11,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 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) [2022-11-26 00:10:11,081 INFO L276 IsEmpty]: Start isEmpty. Operand 5781 states and 23731 transitions. [2022-11-26 00:10:11,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 00:10:11,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:10:11,082 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:10:11,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-26 00:10:11,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:10:11,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-11-26 00:10:11,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 00:10:11,689 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-26 00:10:11,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:10:11,689 INFO L85 PathProgramCache]: Analyzing trace with hash -470546783, now seen corresponding path program 1 times [2022-11-26 00:10:11,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:10:11,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [742084585] [2022-11-26 00:10:11,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:10:11,690 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 [2022-11-26 00:10:11,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:10:11,691 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 00:10:11,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:10:11,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:10:11,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 00:10:11,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:10:11,990 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2022-11-26 00:10:11,991 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 40 treesize of output 55 [2022-11-26 00:10:12,045 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:10:12,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 00:10:12,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:10:12,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:10:12,076 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:10:12,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [742084585] [2022-11-26 00:10:12,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [742084585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:10:12,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:10:12,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:10:12,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010938549] [2022-11-26 00:10:12,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:10:12,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:10:12,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:10:12,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:10:12,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:10:12,078 INFO L87 Difference]: Start difference. First operand 5781 states and 23731 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2022-11-26 00:10:12,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:10:12,319 INFO L93 Difference]: Finished difference Result 5459 states and 22361 transitions. [2022-11-26 00:10:12,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:10:12,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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 [2022-11-26 00:10:12,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:10:12,336 INFO L225 Difference]: With dead ends: 5459 [2022-11-26 00:10:12,336 INFO L226 Difference]: Without dead ends: 5459 [2022-11-26 00:10:12,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:10:12,337 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:10:12,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 6 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:10:12,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5459 states. [2022-11-26 00:10:12,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5459 to 5459. [2022-11-26 00:10:12,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5459 states, 5431 states have (on average 4.117289633584975) internal successors, (22361), 5458 states have internal predecessors, (22361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:10:12,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5459 states to 5459 states and 22361 transitions. [2022-11-26 00:10:12,445 INFO L78 Accepts]: Start accepts. Automaton has 5459 states and 22361 transitions. Word has length 9 [2022-11-26 00:10:12,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:10:12,446 INFO L495 AbstractCegarLoop]: Abstraction has 5459 states and 22361 transitions. [2022-11-26 00:10:12,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2022-11-26 00:10:12,446 INFO L276 IsEmpty]: Start isEmpty. Operand 5459 states and 22361 transitions. [2022-11-26 00:10:12,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 00:10:12,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:10:12,447 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:10:12,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-26 00:10:12,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:10:12,651 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-26 00:10:12,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:10:12,651 INFO L85 PathProgramCache]: Analyzing trace with hash -470546781, now seen corresponding path program 1 times [2022-11-26 00:10:12,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:10:12,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070721398] [2022-11-26 00:10:12,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:10:12,652 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 [2022-11-26 00:10:12,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:10:12,653 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 00:10:12,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:10:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:10:12,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:10:12,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:10:12,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:10:13,180 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-26 00:10:13,180 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 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-26 00:10:13,211 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 128 treesize of output 126 [2022-11-26 00:10:13,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:10:13,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-26 00:10:13,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:10:13,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:10:13,655 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:10:13,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070721398] [2022-11-26 00:10:13,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1070721398] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:10:13,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:10:13,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:10:13,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9103894] [2022-11-26 00:10:13,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:10:13,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:10:13,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:10:13,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:10:13,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:10:13,657 INFO L87 Difference]: Start difference. First operand 5459 states and 22361 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2022-11-26 00:10:14,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:10:14,056 INFO L93 Difference]: Finished difference Result 5137 states and 20991 transitions. [2022-11-26 00:10:14,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:10:14,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 [2022-11-26 00:10:14,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:10:14,072 INFO L225 Difference]: With dead ends: 5137 [2022-11-26 00:10:14,072 INFO L226 Difference]: Without dead ends: 5137 [2022-11-26 00:10:14,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:10:14,073 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 72 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:10:14,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 6 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:10:14,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5137 states. [2022-11-26 00:10:14,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5137 to 5137. [2022-11-26 00:10:14,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5137 states, 5119 states have (on average 4.100605587028716) internal successors, (20991), 5136 states have internal predecessors, (20991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:10:14,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5137 states to 5137 states and 20991 transitions. [2022-11-26 00:10:14,200 INFO L78 Accepts]: Start accepts. Automaton has 5137 states and 20991 transitions. Word has length 9 [2022-11-26 00:10:14,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:10:14,201 INFO L495 AbstractCegarLoop]: Abstraction has 5137 states and 20991 transitions. [2022-11-26 00:10:14,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:10:14,201 INFO L276 IsEmpty]: Start isEmpty. Operand 5137 states and 20991 transitions. [2022-11-26 00:10:14,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 00:10:14,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:10:14,201 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-26 00:10:14,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-26 00:10:14,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:10:14,402 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-26 00:10:14,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:10:14,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1235869397, now seen corresponding path program 2 times [2022-11-26 00:10:14,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:10:14,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304328289] [2022-11-26 00:10:14,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:10:14,403 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 [2022-11-26 00:10:14,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:10:14,405 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 00:10:14,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-26 00:10:14,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-26 00:10:14,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:10:14,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:10:14,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:10:14,927 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-26 00:10:14,927 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-26 00:10:15,269 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-26 00:10:15,269 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-26 00:10:15,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:10:15,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 00:10:15,521 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:10:15,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 00:10:15,602 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 00:10:15,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:10:15,603 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:10:15,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [304328289] [2022-11-26 00:10:15,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [304328289] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:10:15,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:10:15,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:10:15,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416857041] [2022-11-26 00:10:15,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:10:15,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:10:15,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:10:15,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:10:15,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:10:15,604 INFO L87 Difference]: Start difference. First operand 5137 states and 20991 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2022-11-26 00:10:15,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:10:15,973 INFO L93 Difference]: Finished difference Result 4229 states and 17151 transitions. [2022-11-26 00:10:15,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:10:15,974 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 10 [2022-11-26 00:10:15,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:10:15,985 INFO L225 Difference]: With dead ends: 4229 [2022-11-26 00:10:15,985 INFO L226 Difference]: Without dead ends: 4229 [2022-11-26 00:10:15,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:10:15,986 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 33 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:10:15,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 12 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:10:15,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4229 states. [2022-11-26 00:10:16,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 2766. [2022-11-26 00:10:16,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2766 states, 2760 states have (on average 3.9268115942028987) internal successors, (10838), 2765 states have internal predecessors, (10838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:10:16,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2766 states to 2766 states and 10838 transitions. [2022-11-26 00:10:16,047 INFO L78 Accepts]: Start accepts. Automaton has 2766 states and 10838 transitions. Word has length 10 [2022-11-26 00:10:16,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:10:16,047 INFO L495 AbstractCegarLoop]: Abstraction has 2766 states and 10838 transitions. [2022-11-26 00:10:16,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2022-11-26 00:10:16,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2766 states and 10838 transitions. [2022-11-26 00:10:16,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 00:10:16,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:10:16,052 INFO L195 NwaCegarLoop]: trace histogram [9, 1, 1, 1] [2022-11-26 00:10:16,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-26 00:10:16,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:10:16,259 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-26 00:10:16,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:10:16,259 INFO L85 PathProgramCache]: Analyzing trace with hash 828966366, now seen corresponding path program 1 times [2022-11-26 00:10:16,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:10:16,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494869167] [2022-11-26 00:10:16,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:10:16,260 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 [2022-11-26 00:10:16,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:10:16,261 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 00:10:16,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-26 00:10:16,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:10:16,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 00:10:16,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:10:16,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:10:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:10:17,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:10:20,985 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:10:20,986 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:10:20,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494869167] [2022-11-26 00:10:20,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494869167] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:10:20,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1063025867] [2022-11-26 00:10:20,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:10:20,986 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:10:20,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:10:20,987 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:10:20,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-26 00:10:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:10:21,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 00:10:21,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:10:21,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:10:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:10:22,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:10:27,808 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:10:27,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1063025867] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:10:27,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031192860] [2022-11-26 00:10:27,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:10:27,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:10:27,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:10:27,810 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:10:27,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-26 00:10:28,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:10:28,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 00:10:28,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:10:28,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:10:28,362 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:10:28,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:10:29,392 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:10:29,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031192860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:10:29,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:10:29,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 39 [2022-11-26 00:10:29,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425892947] [2022-11-26 00:10:29,393 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:10:29,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-26 00:10:29,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:10:29,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-26 00:10:29,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=1105, Unknown=0, NotChecked=0, Total=1560 [2022-11-26 00:10:29,395 INFO L87 Difference]: Start difference. First operand 2766 states and 10838 transitions. Second operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:10:38,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:10:40,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:10:42,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:10:44,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:10:46,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:10:48,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:10:50,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:10:52,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:10:54,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:10:56,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:10:58,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:11:00,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:11:02,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:11:04,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:11:06,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:11:08,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:11:10,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:11:50,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:11:50,703 INFO L93 Difference]: Finished difference Result 24640 states and 98492 transitions. [2022-11-26 00:11:50,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-26 00:11:50,706 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 40 states have internal predecessors, (45), 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 [2022-11-26 00:11:50,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:11:50,816 INFO L225 Difference]: With dead ends: 24640 [2022-11-26 00:11:50,816 INFO L226 Difference]: Without dead ends: 24640 [2022-11-26 00:11:50,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 35.1s TimeCoverageRelationStatistics Valid=1123, Invalid=2183, Unknown=0, NotChecked=0, Total=3306 [2022-11-26 00:11:50,818 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 5383 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 4641 mSolverCounterSat, 106 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5383 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 4763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 4641 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:11:50,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5383 Valid, 933 Invalid, 4763 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [106 Valid, 4641 Invalid, 16 Unknown, 0 Unchecked, 55.8s Time] [2022-11-26 00:11:50,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24640 states. [2022-11-26 00:11:51,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24640 to 2790. [2022-11-26 00:11:51,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2790 states, 2784 states have (on average 3.9102011494252875) internal successors, (10886), 2789 states have internal predecessors, (10886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:11:51,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 10886 transitions. [2022-11-26 00:11:51,087 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 10886 transitions. Word has length 12 [2022-11-26 00:11:51,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:11:51,087 INFO L495 AbstractCegarLoop]: Abstraction has 2790 states and 10886 transitions. [2022-11-26 00:11:51,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:11:51,088 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 10886 transitions. [2022-11-26 00:11:51,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 00:11:51,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:11:51,089 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:11:51,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-26 00:11:51,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-26 00:11:51,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-26 00:11:51,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 00:11:51,692 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-26 00:11:51,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:11:51,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1992968537, now seen corresponding path program 2 times [2022-11-26 00:11:51,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:11:51,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936122674] [2022-11-26 00:11:51,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:11:51,694 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 [2022-11-26 00:11:51,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:11:51,695 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 00:11:51,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-26 00:11:51,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-26 00:11:51,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:11:51,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 00:11:51,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:11:51,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:11:52,162 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 00:11:52,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:11:52,162 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:11:52,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936122674] [2022-11-26 00:11:52,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936122674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:11:52,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:11:52,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:11:52,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564047333] [2022-11-26 00:11:52,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:11:52,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:11:52,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:11:52,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:11:52,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:11:52,164 INFO L87 Difference]: Start difference. First operand 2790 states and 10886 transitions. Second operand has 4 states, 3 states have (on average 3.0) 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) [2022-11-26 00:11:52,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:11:52,457 INFO L93 Difference]: Finished difference Result 2308 states and 8900 transitions. [2022-11-26 00:11:52,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:11:52,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 [2022-11-26 00:11:52,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:11:52,464 INFO L225 Difference]: With dead ends: 2308 [2022-11-26 00:11:52,464 INFO L226 Difference]: Without dead ends: 2308 [2022-11-26 00:11:52,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:11:52,464 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 58 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:11:52,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 6 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:11:52,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2022-11-26 00:11:52,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 1524. [2022-11-26 00:11:52,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 1521 states have (on average 3.721236028928337) internal successors, (5660), 1523 states have internal predecessors, (5660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:11:52,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 5660 transitions. [2022-11-26 00:11:52,495 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 5660 transitions. Word has length 12 [2022-11-26 00:11:52,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:11:52,496 INFO L495 AbstractCegarLoop]: Abstraction has 1524 states and 5660 transitions. [2022-11-26 00:11:52,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:11:52,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 5660 transitions. [2022-11-26 00:11:52,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 00:11:52,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:11:52,499 INFO L195 NwaCegarLoop]: trace histogram [12, 1, 1] [2022-11-26 00:11:52,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-26 00:11:52,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:11:52,707 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-26 00:11:52,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:11:52,707 INFO L85 PathProgramCache]: Analyzing trace with hash -95303965, now seen corresponding path program 3 times [2022-11-26 00:11:52,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:11:52,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820704148] [2022-11-26 00:11:52,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:11:52,708 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 [2022-11-26 00:11:52,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:11:52,709 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 00:11:52,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:11:53,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-26 00:11:53,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:11:53,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 00:11:53,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:11:53,395 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-26 00:11:53,395 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-26 00:11:54,400 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:11:54,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:12:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:00,151 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:12:00,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820704148] [2022-11-26 00:12:00,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820704148] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:12:00,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1086217225] [2022-11-26 00:12:00,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:12:00,152 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:12:00,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:12:00,153 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:12:00,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-26 00:12:01,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-26 00:12:01,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:12:01,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-26 00:12:01,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:12:02,014 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-26 00:12:02,014 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-26 00:12:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:02,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:12:07,878 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:07,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1086217225] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:12:07,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898654257] [2022-11-26 00:12:07,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:12:07,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:07,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:12:07,880 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:12:07,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-26 00:12:16,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-26 00:12:16,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:12:16,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 00:12:16,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:12:16,532 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-26 00:12:16,533 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-26 00:12:16,968 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:16,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:12:26,692 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:26,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898654257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:12:26,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:12:26,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 50 [2022-11-26 00:12:26,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234716588] [2022-11-26 00:12:26,693 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:12:26,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-26 00:12:26,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:12:26,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-26 00:12:26,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=710, Invalid=1942, Unknown=0, NotChecked=0, Total=2652 [2022-11-26 00:12:26,695 INFO L87 Difference]: Start difference. First operand 1524 states and 5660 transitions. Second operand has 52 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 51 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:12:44,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:12:46,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:12:48,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:12:50,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:12:52,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:12:54,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:12:56,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:12:58,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:13:00,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:13:02,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:13:04,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:13:06,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:13:08,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:13:10,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:13:12,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:13:14,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:13:16,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:13:18,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:13:20,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:13:22,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:13:24,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:13:26,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:13:28,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:13:30,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:13:32,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:13:34,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:13:36,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:13:38,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:13:40,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:14:07,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:07,541 INFO L93 Difference]: Finished difference Result 12682 states and 49824 transitions. [2022-11-26 00:14:07,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-26 00:14:07,543 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 51 states have internal predecessors, (56), 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 [2022-11-26 00:14:07,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:07,584 INFO L225 Difference]: With dead ends: 12682 [2022-11-26 00:14:07,585 INFO L226 Difference]: Without dead ends: 12682 [2022-11-26 00:14:07,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 43.4s TimeCoverageRelationStatistics Valid=1208, Invalid=2824, Unknown=0, NotChecked=0, Total=4032 [2022-11-26 00:14:07,586 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 4889 mSDsluCounter, 1198 mSDsCounter, 0 mSdLazyCounter, 6045 mSolverCounterSat, 499 mSolverCounterUnsat, 29 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 74.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4889 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 6573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 499 IncrementalHoareTripleChecker+Valid, 6045 IncrementalHoareTripleChecker+Invalid, 29 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:07,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4889 Valid, 1275 Invalid, 6573 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [499 Valid, 6045 Invalid, 29 Unknown, 0 Unchecked, 76.8s Time] [2022-11-26 00:14:07,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12682 states. [2022-11-26 00:14:07,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12682 to 1538. [2022-11-26 00:14:07,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1535 states have (on average 3.7055374592833874) internal successors, (5688), 1537 states have internal predecessors, (5688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:07,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 5688 transitions. [2022-11-26 00:14:07,697 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 5688 transitions. Word has length 14 [2022-11-26 00:14:07,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:07,697 INFO L495 AbstractCegarLoop]: Abstraction has 1538 states and 5688 transitions. [2022-11-26 00:14:07,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 51 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:07,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 5688 transitions. [2022-11-26 00:14:07,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-26 00:14:07,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:07,703 INFO L195 NwaCegarLoop]: trace histogram [20, 1, 1, 1] [2022-11-26 00:14:07,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-26 00:14:07,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-26 00:14:08,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-26 00:14:08,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 00:14:08,318 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-26 00:14:08,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:08,318 INFO L85 PathProgramCache]: Analyzing trace with hash 86713895, now seen corresponding path program 2 times [2022-11-26 00:14:08,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:14:08,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864424583] [2022-11-26 00:14:08,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:14:08,319 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 [2022-11-26 00:14:08,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:14:08,320 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 00:14:08,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:14:08,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:14:08,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:14:08,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-26 00:14:08,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:14:08,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:14:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:10,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:14:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:23,304 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:14:23,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864424583] [2022-11-26 00:14:23,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864424583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:14:23,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1558661355] [2022-11-26 00:14:23,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:14:23,305 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:14:23,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:14:23,306 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:14:23,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-26 00:14:24,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:14:24,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:14:24,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-26 00:14:24,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:14:24,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:14:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:24,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:14:26,213 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:26,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1558661355] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:14:26,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007500697] [2022-11-26 00:14:26,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:14:26,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:14:26,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:14:26,215 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:14:26,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-26 00:14:26,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:14:26,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:14:26,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-26 00:14:26,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:14:26,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:14:27,281 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:27,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:14:28,590 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:28,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007500697] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:14:28,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:14:28,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22, 22, 22, 22] total 43 [2022-11-26 00:14:28,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751964542] [2022-11-26 00:14:28,591 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:14:28,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-26 00:14:28,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:14:28,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-26 00:14:28,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=1366, Unknown=0, NotChecked=0, Total=1892 [2022-11-26 00:14:28,592 INFO L87 Difference]: Start difference. First operand 1538 states and 5688 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:06,536 WARN L233 SmtUtils]: Spent 19.90s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:15:09,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:15:11,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:15:13,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:15:15,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:15:17,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:15:19,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:15:21,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:15:23,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:15:25,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:15:27,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:15:29,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:15:31,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:15:33,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:15:35,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:15:37,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:15:39,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:15:41,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:15:43,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:15:45,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:15:47,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:16:08,205 WARN L233 SmtUtils]: Spent 19.11s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:16:31,145 WARN L233 SmtUtils]: Spent 20.19s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:16:45,153 WARN L233 SmtUtils]: Spent 11.43s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:16:58,424 WARN L233 SmtUtils]: Spent 10.81s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:17:07,353 WARN L233 SmtUtils]: Spent 6.15s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:17:16,771 WARN L233 SmtUtils]: Spent 6.56s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:17:25,768 WARN L233 SmtUtils]: Spent 6.60s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:18:29,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:29,274 INFO L93 Difference]: Finished difference Result 35730 states and 141280 transitions. [2022-11-26 00:18:29,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-26 00:18:29,276 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 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 23 [2022-11-26 00:18:29,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:29,391 INFO L225 Difference]: With dead ends: 35730 [2022-11-26 00:18:29,391 INFO L226 Difference]: Without dead ends: 35730 [2022-11-26 00:18:29,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 158.4s TimeCoverageRelationStatistics Valid=1406, Invalid=2626, Unknown=0, NotChecked=0, Total=4032 [2022-11-26 00:18:29,392 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 11774 mSDsluCounter, 2620 mSDsCounter, 0 mSdLazyCounter, 12919 mSolverCounterSat, 172 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 89.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11774 SdHoareTripleChecker+Valid, 2745 SdHoareTripleChecker+Invalid, 13111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 12919 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:29,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11774 Valid, 2745 Invalid, 13111 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [172 Valid, 12919 Invalid, 20 Unknown, 0 Unchecked, 95.0s Time] [2022-11-26 00:18:29,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35730 states. [2022-11-26 00:18:29,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35730 to 1582. [2022-11-26 00:18:29,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1579 states have (on average 3.6580113996200128) internal successors, (5776), 1581 states have internal predecessors, (5776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:29,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 5776 transitions. [2022-11-26 00:18:29,811 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 5776 transitions. Word has length 23 [2022-11-26 00:18:29,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:29,811 INFO L495 AbstractCegarLoop]: Abstraction has 1582 states and 5776 transitions. [2022-11-26 00:18:29,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:29,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 5776 transitions. [2022-11-26 00:18:29,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-26 00:18:29,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:29,816 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, 1, 1, 1, 1, 1] [2022-11-26 00:18:29,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-26 00:18:30,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-26 00:18:30,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-26 00:18:30,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:18:30,423 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-26 00:18:30,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:30,424 INFO L85 PathProgramCache]: Analyzing trace with hash -2004846154, now seen corresponding path program 1 times [2022-11-26 00:18:30,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:18:30,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1397642519] [2022-11-26 00:18:30,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:30,425 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 [2022-11-26 00:18:30,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:18:30,426 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 00:18:30,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:18:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:30,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:18:30,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:18:30,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:30,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:18:30,704 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:18:30,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1397642519] [2022-11-26 00:18:30,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1397642519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:30,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:30,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:18:30,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325156654] [2022-11-26 00:18:30,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:30,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:18:30,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:18:30,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:18:30,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:18:30,706 INFO L87 Difference]: Start difference. First operand 1582 states and 5776 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:31,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:31,138 INFO L93 Difference]: Finished difference Result 1582 states and 5784 transitions. [2022-11-26 00:18:31,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:18:31,139 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 27 [2022-11-26 00:18:31,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:31,144 INFO L225 Difference]: With dead ends: 1582 [2022-11-26 00:18:31,144 INFO L226 Difference]: Without dead ends: 1236 [2022-11-26 00:18:31,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:18:31,145 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 60 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:31,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 12 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:18:31,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2022-11-26 00:18:31,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1236. [2022-11-26 00:18:31,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1233 states have (on average 3.7493917274939172) internal successors, (4623), 1235 states have internal predecessors, (4623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:31,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 4623 transitions. [2022-11-26 00:18:31,172 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 4623 transitions. Word has length 27 [2022-11-26 00:18:31,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:31,172 INFO L495 AbstractCegarLoop]: Abstraction has 1236 states and 4623 transitions. [2022-11-26 00:18:31,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:31,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 4623 transitions. [2022-11-26 00:18:31,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-26 00:18:31,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:31,175 INFO L195 NwaCegarLoop]: trace histogram [26, 1, 1] [2022-11-26 00:18:31,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-26 00:18:31,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:18:31,376 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-26 00:18:31,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:31,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1296909533, now seen corresponding path program 4 times [2022-11-26 00:18:31,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:18:31,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534977896] [2022-11-26 00:18:31,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:18:31,377 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 [2022-11-26 00:18:31,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:18:31,378 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 00:18:31,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:18:31,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:18:31,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:18:31,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-26 00:18:31,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:18:31,973 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-26 00:18:31,973 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-26 00:18:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:34,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:18:55,438 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:55,438 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:18:55,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [534977896] [2022-11-26 00:18:55,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [534977896] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:18:55,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1222021111] [2022-11-26 00:18:55,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:18:55,439 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:18:55,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:18:55,443 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:18:55,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-26 00:18:56,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:18:56,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:18:56,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-26 00:18:56,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:18:56,574 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-26 00:18:56,574 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-26 00:18:59,801 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:59,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:19:02,739 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:02,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1222021111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:19:02,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770252620] [2022-11-26 00:19:02,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:19:02,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:02,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:19:02,740 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:19:02,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_577eab28-96a8-4d3e-af3a-e3d5c65a2010/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-26 00:19:03,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:19:03,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:19:03,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-26 00:19:03,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:03,427 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-26 00:19:03,428 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-26 00:19:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:04,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:19:05,990 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:05,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770252620] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:19:05,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:19:05,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 27, 27] total 70 [2022-11-26 00:19:05,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858392305] [2022-11-26 00:19:05,991 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:19:05,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-26 00:19:05,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:19:05,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-26 00:19:05,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1333, Invalid=3779, Unknown=0, NotChecked=0, Total=5112 [2022-11-26 00:19:05,995 INFO L87 Difference]: Start difference. First operand 1236 states and 4623 transitions. Second operand has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 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)