./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash df820220e47314ad1ae7e5e69c959ff16aa366a463fd9290864972c0f85d142a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 13:11:45,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:11:45,067 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:11:45,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:11:45,081 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:11:45,082 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:11:45,083 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:11:45,084 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:11:45,085 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:11:45,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:11:45,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:11:45,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:11:45,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:11:45,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:11:45,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:11:45,089 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:11:45,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:11:45,090 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:11:45,091 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:11:45,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:11:45,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:11:45,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:11:45,094 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:11:45,095 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:11:45,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:11:45,097 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:11:45,098 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:11:45,098 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:11:45,098 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:11:45,099 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:11:45,099 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:11:45,100 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:11:45,100 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:11:45,101 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:11:45,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:11:45,101 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:11:45,102 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:11:45,102 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:11:45,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:11:45,102 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:11:45,103 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:11:45,104 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 13:11:45,117 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:11:45,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:11:45,117 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:11:45,118 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:11:45,118 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:11:45,118 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:11:45,118 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:11:45,118 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:11:45,118 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:11:45,118 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:11:45,119 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:11:45,119 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:11:45,119 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:11:45,119 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:11:45,119 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:11:45,119 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:11:45,119 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:11:45,119 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:11:45,120 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 13:11:45,120 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 13:11:45,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:11:45,120 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:11:45,120 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 13:11:45,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:11:45,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:11:45,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:11:45,120 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 13:11:45,121 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 13:11:45,121 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 13:11:45,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:11:45,121 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 13:11:45,121 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:11:45,121 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:11:45,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:11:45,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:11:45,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:11:45,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:11:45,121 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:11:45,122 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:11:45,122 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:11:45,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:11:45,122 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:11:45,122 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_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df820220e47314ad1ae7e5e69c959ff16aa366a463fd9290864972c0f85d142a [2022-12-14 13:11:45,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:11:45,332 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:11:45,334 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:11:45,335 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:11:45,335 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:11:45,336 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2022-12-14 13:11:48,017 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:11:48,143 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:11:48,144 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2022-12-14 13:11:48,148 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/data/636f8916d/029d5c0f645b4c29a5b5035f178f2a89/FLAG69b09b803 [2022-12-14 13:11:48,159 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/data/636f8916d/029d5c0f645b4c29a5b5035f178f2a89 [2022-12-14 13:11:48,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:11:48,162 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:11:48,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:11:48,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:11:48,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:11:48,166 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:11:48" (1/1) ... [2022-12-14 13:11:48,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13dddcdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:11:48, skipping insertion in model container [2022-12-14 13:11:48,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:11:48" (1/1) ... [2022-12-14 13:11:48,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:11:48,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:11:48,341 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:48,342 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:48,343 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:48,345 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:48,345 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:48,345 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:48,348 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:48,349 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:48,349 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:48,350 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:48,350 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:48,351 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:48,352 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:48,352 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:48,352 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:48,353 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:48,354 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:48,354 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:48,355 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:48,355 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:48,356 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:48,357 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:48,357 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:48,357 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:48,365 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_075e18f1-4b86-493f-ac57-22b27e40572b/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2022-12-14 13:11:48,374 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:11:48,384 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-12-14 13:11:48,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6b70bbed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:11:48, skipping insertion in model container [2022-12-14 13:11:48,384 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:11:48,385 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 13:11:48,386 INFO L158 Benchmark]: Toolchain (without parser) took 223.86ms. Allocated memory is still 140.5MB. Free memory was 97.9MB in the beginning and 107.1MB in the end (delta: -9.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-12-14 13:11:48,386 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 102.8MB. Free memory is still 73.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 13:11:48,387 INFO L158 Benchmark]: CACSL2BoogieTranslator took 222.14ms. Allocated memory is still 140.5MB. Free memory was 97.4MB in the beginning and 107.1MB in the end (delta: -9.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-12-14 13:11:48,388 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 102.8MB. Free memory is still 73.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 222.14ms. Allocated memory is still 140.5MB. Free memory was 97.4MB in the beginning and 107.1MB in the end (delta: -9.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 157]: 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_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash df820220e47314ad1ae7e5e69c959ff16aa366a463fd9290864972c0f85d142a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 13:11:49,857 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:11:49,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:11:49,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:11:49,878 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:11:49,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:11:49,879 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:11:49,881 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:11:49,882 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:11:49,882 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:11:49,883 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:11:49,884 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:11:49,884 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:11:49,885 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:11:49,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:11:49,886 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:11:49,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:11:49,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:11:49,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:11:49,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:11:49,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:11:49,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:11:49,891 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:11:49,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:11:49,894 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:11:49,894 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:11:49,894 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:11:49,895 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:11:49,895 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:11:49,896 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:11:49,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:11:49,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:11:49,897 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:11:49,897 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:11:49,898 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:11:49,898 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:11:49,899 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:11:49,899 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:11:49,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:11:49,899 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:11:49,900 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:11:49,901 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 13:11:49,916 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:11:49,916 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:11:49,916 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:11:49,916 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:11:49,917 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:11:49,917 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:11:49,917 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:11:49,917 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:11:49,917 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:11:49,917 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:11:49,918 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:11:49,918 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:11:49,918 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 13:11:49,918 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 13:11:49,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:11:49,918 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:11:49,918 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 13:11:49,919 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:11:49,919 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:11:49,919 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:11:49,919 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 13:11:49,919 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 13:11:49,919 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 13:11:49,919 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:11:49,919 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 13:11:49,919 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 13:11:49,919 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 13:11:49,920 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:11:49,920 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:11:49,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:11:49,920 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 13:11:49,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:11:49,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:11:49,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:11:49,920 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:11:49,920 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 13:11:49,920 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 13:11:49,920 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:11:49,921 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 13:11:49,921 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_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df820220e47314ad1ae7e5e69c959ff16aa366a463fd9290864972c0f85d142a [2022-12-14 13:11:50,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:11:50,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:11:50,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:11:50,176 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:11:50,176 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:11:50,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2022-12-14 13:11:52,758 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:11:52,924 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:11:52,924 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2022-12-14 13:11:52,930 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/data/27881a628/c0d7bf527d0241f384ec5f71390459ff/FLAGc32408e3f [2022-12-14 13:11:52,942 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/data/27881a628/c0d7bf527d0241f384ec5f71390459ff [2022-12-14 13:11:52,944 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:11:52,945 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:11:52,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:11:52,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:11:52,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:11:52,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:11:52" (1/1) ... [2022-12-14 13:11:52,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cdc0a42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:11:52, skipping insertion in model container [2022-12-14 13:11:52,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:11:52" (1/1) ... [2022-12-14 13:11:52,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:11:52,971 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:11:53,084 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,085 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,085 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,088 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,088 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,088 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,091 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,092 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,092 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,093 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,094 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,094 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,095 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,096 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,096 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,097 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,097 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,098 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,099 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,099 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,099 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,100 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,101 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,101 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,108 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_075e18f1-4b86-493f-ac57-22b27e40572b/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2022-12-14 13:11:53,118 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:11:53,128 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 13:11:53,132 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:11:53,136 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,136 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,137 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,138 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,138 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,138 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,139 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,140 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,140 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,141 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,141 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,142 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,142 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,143 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,143 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,144 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,144 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,145 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,146 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,146 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,147 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,148 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,148 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,148 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,153 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_075e18f1-4b86-493f-ac57-22b27e40572b/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2022-12-14 13:11:53,156 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:11:53,160 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:11:53,171 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,171 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,172 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,173 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,173 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,173 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,174 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,174 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,174 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,175 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,175 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,176 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,176 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,177 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,177 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,178 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,178 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,179 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,179 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,180 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,180 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,181 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,181 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:11:53,181 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:11:53,186 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_075e18f1-4b86-493f-ac57-22b27e40572b/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2022-12-14 13:11:53,189 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:11:53,203 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:11:53,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:11:53 WrapperNode [2022-12-14 13:11:53,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:11:53,204 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:11:53,205 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:11:53,205 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:11:53,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:11:53" (1/1) ... [2022-12-14 13:11:53,221 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:11:53" (1/1) ... [2022-12-14 13:11:53,246 INFO L138 Inliner]: procedures = 29, calls = 76, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 293 [2022-12-14 13:11:53,246 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:11:53,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:11:53,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:11:53,247 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:11:53,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:11:53" (1/1) ... [2022-12-14 13:11:53,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:11:53" (1/1) ... [2022-12-14 13:11:53,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:11:53" (1/1) ... [2022-12-14 13:11:53,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:11:53" (1/1) ... [2022-12-14 13:11:53,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:11:53" (1/1) ... [2022-12-14 13:11:53,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:11:53" (1/1) ... [2022-12-14 13:11:53,275 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:11:53" (1/1) ... [2022-12-14 13:11:53,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:11:53" (1/1) ... [2022-12-14 13:11:53,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:11:53,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:11:53,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:11:53,280 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:11:53,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:11:53" (1/1) ... [2022-12-14 13:11:53,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:11:53,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:11:53,306 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:11:53,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:11:53,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:11:53,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 13:11:53,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 13:11:53,347 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 13:11:53,347 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 13:11:53,347 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 13:11:53,347 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 13:11:53,348 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 13:11:53,348 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-14 13:11:53,348 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-14 13:11:53,348 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-14 13:11:53,348 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-14 13:11:53,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 13:11:53,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 13:11:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 13:11:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:11:53,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:11:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 13:11:53,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 13:11:53,351 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 13:11:53,481 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:11:53,483 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:11:54,061 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:11:54,233 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:11:54,234 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-14 13:11:54,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:11:54 BoogieIcfgContainer [2022-12-14 13:11:54,236 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:11:54,238 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:11:54,238 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:11:54,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:11:54,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:11:52" (1/3) ... [2022-12-14 13:11:54,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@583ae1a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:11:54, skipping insertion in model container [2022-12-14 13:11:54,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:11:53" (2/3) ... [2022-12-14 13:11:54,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@583ae1a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:11:54, skipping insertion in model container [2022-12-14 13:11:54,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:11:54" (3/3) ... [2022-12-14 13:11:54,243 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult2.wvr.c [2022-12-14 13:11:54,257 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:11:54,258 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-12-14 13:11:54,258 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 13:11:54,328 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-14 13:11:54,360 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 13:11:54,373 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 248 places, 253 transitions, 538 flow [2022-12-14 13:11:54,375 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 248 places, 253 transitions, 538 flow [2022-12-14 13:11:54,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 253 transitions, 538 flow [2022-12-14 13:11:54,457 INFO L130 PetriNetUnfolder]: 18/249 cut-off events. [2022-12-14 13:11:54,457 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-14 13:11:54,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 249 events. 18/249 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 226 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 197. Up to 2 conditions per place. [2022-12-14 13:11:54,465 INFO L119 LiptonReduction]: Number of co-enabled transitions 3160 [2022-12-14 13:12:18,373 WARN L233 SmtUtils]: Spent 5.65s on a formula simplification. DAG size of input: 156 DAG size of output: 155 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 13:12:28,010 WARN L233 SmtUtils]: Spent 9.18s on a formula simplification. DAG size of input: 162 DAG size of output: 161 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 13:12:30,528 INFO L134 LiptonReduction]: Checked pairs total: 5747 [2022-12-14 13:12:30,528 INFO L136 LiptonReduction]: Total number of compositions: 253 [2022-12-14 13:12:30,535 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 76 places, 69 transitions, 170 flow [2022-12-14 13:12:30,698 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) [2022-12-14 13:12:30,711 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:12:30,714 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;@6c09121c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:12:30,714 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2022-12-14 13:12:30,729 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) [2022-12-14 13:12:30,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 13:12:30,733 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:12:30,733 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 13:12:30,734 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:12:30,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:12:30,753 INFO L85 PathProgramCache]: Analyzing trace with hash 38636, now seen corresponding path program 1 times [2022-12-14 13:12:30,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:12:30,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500131644] [2022-12-14 13:12:30,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:12:30,763 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:12:30,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:12:30,764 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:12:30,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 13:12:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:12:30,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:12:30,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:12:31,052 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-14 13:12:31,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-14 13:12:31,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:12:31,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:12:31,087 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:12:31,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500131644] [2022-12-14 13:12:31,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500131644] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:12:31,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:12:31,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:12:31,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818546025] [2022-12-14 13:12:31,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:12:31,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:12:31,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:12:31,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:12:31,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:12:31,124 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) [2022-12-14 13:12:31,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:12:31,436 INFO L93 Difference]: Finished difference Result 5218 states and 23212 transitions. [2022-12-14 13:12:31,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:12:31,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-12-14 13:12:31,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:12:31,486 INFO L225 Difference]: With dead ends: 5218 [2022-12-14 13:12:31,486 INFO L226 Difference]: Without dead ends: 5218 [2022-12-14 13:12:31,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:12:31,490 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, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:12:31,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 6 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:12:31,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5218 states. [2022-12-14 13:12:31,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5218 to 5218. [2022-12-14 13:12:31,770 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) [2022-12-14 13:12:31,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5218 states to 5218 states and 23212 transitions. [2022-12-14 13:12:31,833 INFO L78 Accepts]: Start accepts. Automaton has 5218 states and 23212 transitions. Word has length 2 [2022-12-14 13:12:31,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:12:31,833 INFO L495 AbstractCegarLoop]: Abstraction has 5218 states and 23212 transitions. [2022-12-14 13:12:31,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:12:31,834 INFO L276 IsEmpty]: Start isEmpty. Operand 5218 states and 23212 transitions. [2022-12-14 13:12:31,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 13:12:31,834 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:12:31,834 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 13:12:31,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:12:32,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:12:32,036 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:12:32,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:12:32,036 INFO L85 PathProgramCache]: Analyzing trace with hash 38637, now seen corresponding path program 1 times [2022-12-14 13:12:32,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:12:32,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251571670] [2022-12-14 13:12:32,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:12:32,037 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:12:32,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:12:32,038 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:12:32,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 13:12:32,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:12:32,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:12:32,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:12:32,416 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 13:12:32,417 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 [2022-12-14 13:12:32,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:12:32,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:12:32,461 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:12:32,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251571670] [2022-12-14 13:12:32,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251571670] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:12:32,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:12:32,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:12:32,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586716845] [2022-12-14 13:12:32,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:12:32,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:12:32,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:12:32,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:12:32,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:12:32,464 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) [2022-12-14 13:12:33,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:12:33,016 INFO L93 Difference]: Finished difference Result 10433 states and 46421 transitions. [2022-12-14 13:12:33,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:12:33,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-12-14 13:12:33,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:12:33,094 INFO L225 Difference]: With dead ends: 10433 [2022-12-14 13:12:33,094 INFO L226 Difference]: Without dead ends: 10433 [2022-12-14 13:12:33,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:12:33,095 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:12:33,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 12 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:12:33,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10433 states. [2022-12-14 13:12:33,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10433 to 5220. [2022-12-14 13:12:33,309 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) [2022-12-14 13:12:33,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5220 states to 5220 states and 23218 transitions. [2022-12-14 13:12:33,335 INFO L78 Accepts]: Start accepts. Automaton has 5220 states and 23218 transitions. Word has length 2 [2022-12-14 13:12:33,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:12:33,336 INFO L495 AbstractCegarLoop]: Abstraction has 5220 states and 23218 transitions. [2022-12-14 13:12:33,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:12:33,336 INFO L276 IsEmpty]: Start isEmpty. Operand 5220 states and 23218 transitions. [2022-12-14 13:12:33,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 13:12:33,337 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:12:33,337 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 13:12:33,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 13:12:33,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:12:33,539 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:12:33,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:12:33,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1202160, now seen corresponding path program 1 times [2022-12-14 13:12:33,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:12:33,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960741550] [2022-12-14 13:12:33,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:12:33,545 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:12:33,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:12:33,549 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:12:33,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 13:12:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:12:33,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 13:12:33,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:12:33,879 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 13:12:33,879 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 [2022-12-14 13:12:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:12:33,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:12:34,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:12:34,110 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:12:34,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960741550] [2022-12-14 13:12:34,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960741550] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:12:34,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1954947081] [2022-12-14 13:12:34,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:12:34,111 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:12:34,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:12:34,112 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:12:34,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-12-14 13:12:34,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:12:34,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 13:12:34,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:12:34,401 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 13:12:34,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 13:12:34,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:12:34,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:12:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:12:34,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1954947081] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:12:34,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913171125] [2022-12-14 13:12:34,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:12:34,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:12:34,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:12:34,500 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:12:34,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:12:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:12:34,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 13:12:34,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:12:34,697 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 13:12:34,697 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 [2022-12-14 13:12:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:12:34,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:12:34,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:12:34,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913171125] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:12:34,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:12:34,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-12-14 13:12:34,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062370297] [2022-12-14 13:12:34,883 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:12:34,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 13:12:34,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:12:34,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 13:12:34,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:12:34,885 INFO L87 Difference]: Start difference. First operand 5220 states and 23218 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:12:37,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:12:37,457 INFO L93 Difference]: Finished difference Result 20865 states and 92845 transitions. [2022-12-14 13:12:37,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 13:12:37,458 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 13:12:37,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:12:37,612 INFO L225 Difference]: With dead ends: 20865 [2022-12-14 13:12:37,612 INFO L226 Difference]: Without dead ends: 20865 [2022-12-14 13:12:37,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-14 13:12:37,614 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 437 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:12:37,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 36 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 13:12:37,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20865 states. [2022-12-14 13:12:37,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20865 to 5226. [2022-12-14 13:12:37,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5226 states, 4823 states have (on average 4.817748289446403) internal successors, (23236), 5225 states have internal predecessors, (23236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:12:37,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5226 states to 5226 states and 23236 transitions. [2022-12-14 13:12:37,889 INFO L78 Accepts]: Start accepts. Automaton has 5226 states and 23236 transitions. Word has length 3 [2022-12-14 13:12:37,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:12:37,889 INFO L495 AbstractCegarLoop]: Abstraction has 5226 states and 23236 transitions. [2022-12-14 13:12:37,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:12:37,890 INFO L276 IsEmpty]: Start isEmpty. Operand 5226 states and 23236 transitions. [2022-12-14 13:12:37,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 13:12:37,890 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:12:37,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 13:12:37,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 13:12:38,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 13:12:38,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2022-12-14 13:12:38,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 13:12:38,493 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:12:38,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:12:38,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1203445, now seen corresponding path program 1 times [2022-12-14 13:12:38,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:12:38,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [567295226] [2022-12-14 13:12:38,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:12:38,497 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:12:38,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:12:38,498 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:12:38,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-14 13:12:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:12:38,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 13:12:38,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:12:38,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:38,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:38,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:38,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:38,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:38,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:38,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:38,791 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-14 13:12:38,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 38 [2022-12-14 13:12:38,835 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-12-14 13:12:38,835 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 40 treesize of output 34 [2022-12-14 13:12:38,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:38,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 13:12:38,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:12:38,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:12:38,918 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:12:38,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [567295226] [2022-12-14 13:12:38,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [567295226] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:12:38,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:12:38,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:12:38,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053531658] [2022-12-14 13:12:38,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:12:38,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:12:38,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:12:38,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:12:38,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:12:38,919 INFO L87 Difference]: Start difference. First operand 5226 states and 23236 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) [2022-12-14 13:12:39,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:12:39,143 INFO L93 Difference]: Finished difference Result 4325 states and 18731 transitions. [2022-12-14 13:12:39,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:12:39,144 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 [2022-12-14 13:12:39,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:12:39,159 INFO L225 Difference]: With dead ends: 4325 [2022-12-14 13:12:39,160 INFO L226 Difference]: Without dead ends: 4325 [2022-12-14 13:12:39,160 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 [2022-12-14 13:12:39,161 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 114 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:12:39,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 6 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:12:39,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4325 states. [2022-12-14 13:12:39,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4325 to 4325. [2022-12-14 13:12:39,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4325 states, 4004 states have (on average 4.678071928071928) internal successors, (18731), 4324 states have internal predecessors, (18731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:12:39,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4325 states to 4325 states and 18731 transitions. [2022-12-14 13:12:39,315 INFO L78 Accepts]: Start accepts. Automaton has 4325 states and 18731 transitions. Word has length 3 [2022-12-14 13:12:39,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:12:39,315 INFO L495 AbstractCegarLoop]: Abstraction has 4325 states and 18731 transitions. [2022-12-14 13:12:39,316 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) [2022-12-14 13:12:39,316 INFO L276 IsEmpty]: Start isEmpty. Operand 4325 states and 18731 transitions. [2022-12-14 13:12:39,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 13:12:39,316 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:12:39,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 13:12:39,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-14 13:12:39,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:12:39,517 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:12:39,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:12:39,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1203447, now seen corresponding path program 1 times [2022-12-14 13:12:39,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:12:39,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561822194] [2022-12-14 13:12:39,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:12:39,518 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:12:39,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:12:39,518 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:12:39,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-14 13:12:39,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:12:39,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 13:12:39,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:12:39,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:39,717 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2022-12-14 13:12:39,717 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 [2022-12-14 13:12:40,035 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-12-14 13:12:40,036 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 [2022-12-14 13:12:40,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:12:40,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:12:40,097 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:12:40,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561822194] [2022-12-14 13:12:40,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [561822194] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:12:40,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:12:40,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:12:40,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970583262] [2022-12-14 13:12:40,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:12:40,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:12:40,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:12:40,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:12:40,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:12:40,098 INFO L87 Difference]: Start difference. First operand 4325 states and 18731 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) [2022-12-14 13:12:40,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:12:40,428 INFO L93 Difference]: Finished difference Result 3424 states and 14226 transitions. [2022-12-14 13:12:40,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:12:40,430 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 [2022-12-14 13:12:40,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:12:40,443 INFO L225 Difference]: With dead ends: 3424 [2022-12-14 13:12:40,443 INFO L226 Difference]: Without dead ends: 3424 [2022-12-14 13:12:40,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:12:40,444 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:12:40,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 6 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:12:40,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3424 states. [2022-12-14 13:12:40,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3424 to 3424. [2022-12-14 13:12:40,521 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) [2022-12-14 13:12:40,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3424 states to 3424 states and 14226 transitions. [2022-12-14 13:12:40,538 INFO L78 Accepts]: Start accepts. Automaton has 3424 states and 14226 transitions. Word has length 3 [2022-12-14 13:12:40,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:12:40,538 INFO L495 AbstractCegarLoop]: Abstraction has 3424 states and 14226 transitions. [2022-12-14 13:12:40,538 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) [2022-12-14 13:12:40,538 INFO L276 IsEmpty]: Start isEmpty. Operand 3424 states and 14226 transitions. [2022-12-14 13:12:40,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 13:12:40,539 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:12:40,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 13:12:40,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-14 13:12:40,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:12:40,740 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:12:40,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:12:40,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1156541220, now seen corresponding path program 1 times [2022-12-14 13:12:40,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:12:40,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1128554036] [2022-12-14 13:12:40,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:12:40,741 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:12:40,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:12:40,742 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:12:40,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-14 13:12:40,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:12:40,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 13:12:40,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:12:40,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:40,965 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-12-14 13:12:40,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2022-12-14 13:12:41,243 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-12-14 13:12:41,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-12-14 13:12:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:12:41,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:12:41,382 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:12:41,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1128554036] [2022-12-14 13:12:41,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1128554036] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:12:41,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:12:41,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:12:41,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026460157] [2022-12-14 13:12:41,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:12:41,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:12:41,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:12:41,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:12:41,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:12:41,384 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) [2022-12-14 13:12:41,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:12:41,638 INFO L93 Difference]: Finished difference Result 3239 states and 13496 transitions. [2022-12-14 13:12:41,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:12:41,639 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 [2022-12-14 13:12:41,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:12:41,651 INFO L225 Difference]: With dead ends: 3239 [2022-12-14 13:12:41,651 INFO L226 Difference]: Without dead ends: 3239 [2022-12-14 13:12:41,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:12:41,652 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 51 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:12:41,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 6 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:12:41,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3239 states. [2022-12-14 13:12:41,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3239 to 3239. [2022-12-14 13:12:41,720 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) [2022-12-14 13:12:41,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3239 states to 3239 states and 13496 transitions. [2022-12-14 13:12:41,731 INFO L78 Accepts]: Start accepts. Automaton has 3239 states and 13496 transitions. Word has length 5 [2022-12-14 13:12:41,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:12:41,732 INFO L495 AbstractCegarLoop]: Abstraction has 3239 states and 13496 transitions. [2022-12-14 13:12:41,732 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) [2022-12-14 13:12:41,732 INFO L276 IsEmpty]: Start isEmpty. Operand 3239 states and 13496 transitions. [2022-12-14 13:12:41,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 13:12:41,732 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:12:41,732 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 13:12:41,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-14 13:12:41,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:12:41,934 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:12:41,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:12:41,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1156541222, now seen corresponding path program 1 times [2022-12-14 13:12:41,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:12:41,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1536634095] [2022-12-14 13:12:41,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:12:41,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:12:41,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:12:41,939 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:12:41,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-14 13:12:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:12:42,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 13:12:42,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:12:42,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:42,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:42,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:42,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:42,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:42,287 INFO L321 Elim1Store]: treesize reduction 56, result has 37.8 percent of original size [2022-12-14 13:12:42,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 44 [2022-12-14 13:12:42,326 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 13:12:42,326 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 80 treesize of output 81 [2022-12-14 13:12:42,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:42,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 13:12:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:12:42,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:12:42,433 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:12:42,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1536634095] [2022-12-14 13:12:42,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1536634095] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:12:42,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:12:42,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:12:42,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573713761] [2022-12-14 13:12:42,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:12:42,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:12:42,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:12:42,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:12:42,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:12:42,434 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) [2022-12-14 13:12:42,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:12:42,630 INFO L93 Difference]: Finished difference Result 3054 states and 12766 transitions. [2022-12-14 13:12:42,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:12:42,631 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 13:12:42,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:12:42,640 INFO L225 Difference]: With dead ends: 3054 [2022-12-14 13:12:42,640 INFO L226 Difference]: Without dead ends: 3054 [2022-12-14 13:12:42,640 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 [2022-12-14 13:12:42,641 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, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:12:42,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 6 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:12:42,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3054 states. [2022-12-14 13:12:42,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3054 to 3054. [2022-12-14 13:12:42,696 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) [2022-12-14 13:12:42,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3054 states to 3054 states and 12766 transitions. [2022-12-14 13:12:42,704 INFO L78 Accepts]: Start accepts. Automaton has 3054 states and 12766 transitions. Word has length 5 [2022-12-14 13:12:42,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:12:42,704 INFO L495 AbstractCegarLoop]: Abstraction has 3054 states and 12766 transitions. [2022-12-14 13:12:42,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:12:42,704 INFO L276 IsEmpty]: Start isEmpty. Operand 3054 states and 12766 transitions. [2022-12-14 13:12:42,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 13:12:42,705 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:12:42,705 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 13:12:42,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:12:42,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:12:42,906 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:12:42,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:12:42,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1458192301, now seen corresponding path program 2 times [2022-12-14 13:12:42,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:12:42,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225004481] [2022-12-14 13:12:42,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:12:42,910 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:12:42,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:12:42,913 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:12:42,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-14 13:12:43,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:12:43,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:12:43,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 13:12:43,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:12:43,158 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 13:12:43,158 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 [2022-12-14 13:12:43,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:12:43,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:12:43,937 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:12:43,937 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:12:43,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225004481] [2022-12-14 13:12:43,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1225004481] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:12:43,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [694575073] [2022-12-14 13:12:43,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:12:43,937 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:12:43,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:12:43,938 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:12:43,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-12-14 13:12:44,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:12:44,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:12:44,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 13:12:44,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:12:44,295 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 13:12:44,296 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 [2022-12-14 13:12:44,360 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:12:44,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:12:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:12:44,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [694575073] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:12:44,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806314910] [2022-12-14 13:12:44,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:12:44,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:12:44,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:12:44,504 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:12:44,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 13:12:44,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:12:44,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:12:44,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 13:12:44,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:12:44,779 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 13:12:44,779 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 [2022-12-14 13:12:44,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:12:44,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:12:44,984 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:12:44,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806314910] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:12:44,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:12:44,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2022-12-14 13:12:44,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618347604] [2022-12-14 13:12:44,984 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:12:44,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 13:12:44,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:12:44,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 13:12:44,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-14 13:12:44,985 INFO L87 Difference]: Start difference. First operand 3054 states and 12766 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:12:47,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:12:49,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:12:52,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:12:56,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:12:56,394 INFO L93 Difference]: Finished difference Result 24351 states and 101987 transitions. [2022-12-14 13:12:56,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 13:12:56,395 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 13:12:56,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:12:56,484 INFO L225 Difference]: With dead ends: 24351 [2022-12-14 13:12:56,484 INFO L226 Difference]: Without dead ends: 24351 [2022-12-14 13:12:56,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-12-14 13:12:56,485 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 846 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 1297 mSolverCounterSat, 54 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1297 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:12:56,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 174 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1297 Invalid, 2 Unknown, 0 Unchecked, 10.1s Time] [2022-12-14 13:12:56,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24351 states. [2022-12-14 13:12:56,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24351 to 3064. [2022-12-14 13:12:56,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3064 states, 2885 states have (on average 4.431889081455806) internal successors, (12786), 3063 states have internal predecessors, (12786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:12:56,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3064 states to 3064 states and 12786 transitions. [2022-12-14 13:12:56,710 INFO L78 Accepts]: Start accepts. Automaton has 3064 states and 12786 transitions. Word has length 6 [2022-12-14 13:12:56,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:12:56,710 INFO L495 AbstractCegarLoop]: Abstraction has 3064 states and 12786 transitions. [2022-12-14 13:12:56,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:12:56,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3064 states and 12786 transitions. [2022-12-14 13:12:56,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 13:12:56,711 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:12:56,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 13:12:56,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 13:12:56,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-12-14 13:12:57,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-14 13:12:57,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:12:57,314 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:12:57,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:12:57,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1493032731, now seen corresponding path program 1 times [2022-12-14 13:12:57,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:12:57,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302023312] [2022-12-14 13:12:57,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:12:57,317 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:12:57,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:12:57,320 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:12:57,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-14 13:12:57,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:12:57,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 13:12:57,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:12:57,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:12:57,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:12:57,441 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:12:57,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302023312] [2022-12-14 13:12:57,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302023312] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:12:57,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:12:57,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:12:57,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408338460] [2022-12-14 13:12:57,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:12:57,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:12:57,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:12:57,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:12:57,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:12:57,443 INFO L87 Difference]: Start difference. First operand 3064 states and 12786 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) [2022-12-14 13:12:57,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:12:57,766 INFO L93 Difference]: Finished difference Result 4139 states and 16548 transitions. [2022-12-14 13:12:57,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:12:57,766 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 [2022-12-14 13:12:57,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:12:57,778 INFO L225 Difference]: With dead ends: 4139 [2022-12-14 13:12:57,778 INFO L226 Difference]: Without dead ends: 4139 [2022-12-14 13:12:57,778 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 [2022-12-14 13:12:57,779 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 39 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:12:57,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 18 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:12:57,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2022-12-14 13:12:57,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 3938. [2022-12-14 13:12:57,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3938 states, 3759 states have (on average 4.275073157754722) internal successors, (16070), 3937 states have internal predecessors, (16070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:12:57,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3938 states to 3938 states and 16070 transitions. [2022-12-14 13:12:57,858 INFO L78 Accepts]: Start accepts. Automaton has 3938 states and 16070 transitions. Word has length 6 [2022-12-14 13:12:57,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:12:57,859 INFO L495 AbstractCegarLoop]: Abstraction has 3938 states and 16070 transitions. [2022-12-14 13:12:57,859 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) [2022-12-14 13:12:57,859 INFO L276 IsEmpty]: Start isEmpty. Operand 3938 states and 16070 transitions. [2022-12-14 13:12:57,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 13:12:57,859 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:12:57,859 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:12:57,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-14 13:12:58,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:12:58,060 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:12:58,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:12:58,060 INFO L85 PathProgramCache]: Analyzing trace with hash -2005834082, now seen corresponding path program 1 times [2022-12-14 13:12:58,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:12:58,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1497325747] [2022-12-14 13:12:58,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:12:58,061 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:12:58,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:12:58,062 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:12:58,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-14 13:12:58,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:12:58,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 13:12:58,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:12:58,299 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-14 13:12:58,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-14 13:12:58,320 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:12:58,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 13:12:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:12:58,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:12:58,335 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:12:58,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1497325747] [2022-12-14 13:12:58,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1497325747] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:12:58,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:12:58,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:12:58,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304821783] [2022-12-14 13:12:58,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:12:58,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:12:58,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:12:58,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:12:58,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:12:58,336 INFO L87 Difference]: Start difference. First operand 3938 states and 16070 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) [2022-12-14 13:12:58,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:12:58,520 INFO L93 Difference]: Finished difference Result 3032 states and 12194 transitions. [2022-12-14 13:12:58,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:12:58,521 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 [2022-12-14 13:12:58,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:12:58,528 INFO L225 Difference]: With dead ends: 3032 [2022-12-14 13:12:58,528 INFO L226 Difference]: Without dead ends: 3032 [2022-12-14 13:12:58,529 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 [2022-12-14 13:12:58,529 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 92 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:12:58,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 6 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:12:58,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2022-12-14 13:12:58,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 3032. [2022-12-14 13:12:58,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3032 states, 2940 states have (on average 4.147619047619048) internal successors, (12194), 3031 states have internal predecessors, (12194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:12:58,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3032 states to 3032 states and 12194 transitions. [2022-12-14 13:12:58,580 INFO L78 Accepts]: Start accepts. Automaton has 3032 states and 12194 transitions. Word has length 7 [2022-12-14 13:12:58,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:12:58,581 INFO L495 AbstractCegarLoop]: Abstraction has 3032 states and 12194 transitions. [2022-12-14 13:12:58,581 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) [2022-12-14 13:12:58,581 INFO L276 IsEmpty]: Start isEmpty. Operand 3032 states and 12194 transitions. [2022-12-14 13:12:58,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 13:12:58,581 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:12:58,581 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:12:58,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-14 13:12:58,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:12:58,783 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:12:58,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:12:58,784 INFO L85 PathProgramCache]: Analyzing trace with hash -2005834081, now seen corresponding path program 1 times [2022-12-14 13:12:58,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:12:58,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678218995] [2022-12-14 13:12:58,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:12:58,786 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 [2022-12-14 13:12:58,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:12:58,789 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:12:58,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-14 13:12:58,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:12:58,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 13:12:58,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:12:59,105 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 13:12:59,106 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 [2022-12-14 13:12:59,258 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-14 13:12:59,259 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 [2022-12-14 13:12:59,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:59,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:12:59,396 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 13:12:59,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 13:12:59,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:12:59,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:13:02,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:13:02,379 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:13:02,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678218995] [2022-12-14 13:13:02,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678218995] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:13:02,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [986134959] [2022-12-14 13:13:02,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:02,379 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:13:02,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:13:02,380 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:13:02,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-12-14 13:13:02,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:02,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 13:13:02,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:02,743 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 13:13:02,743 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 [2022-12-14 13:13:02,960 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-14 13:13:02,960 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 [2022-12-14 13:13:03,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:13:03,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:13:03,138 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 13:13:03,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 13:13:03,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:13:03,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:13:03,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:13:03,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [986134959] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:13:03,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73703754] [2022-12-14 13:13:03,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:03,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:13:03,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:13:03,922 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:13:03,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 13:13:04,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:04,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 13:13:04,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:04,212 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 13:13:04,213 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 [2022-12-14 13:13:04,403 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-14 13:13:04,403 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 [2022-12-14 13:13:04,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:13:04,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:13:04,481 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 13:13:04,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 13:13:04,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:13:04,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:13:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:13:05,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73703754] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:13:05,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:13:05,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 8 [2022-12-14 13:13:05,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310269163] [2022-12-14 13:13:05,503 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:13:05,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 13:13:05,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:13:05,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 13:13:05,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-14 13:13:05,504 INFO L87 Difference]: Start difference. First operand 3032 states and 12194 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:13:11,525 WARN L233 SmtUtils]: Spent 5.92s on a formula simplification. DAG size of input: 55 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:13:18,605 WARN L233 SmtUtils]: Spent 6.73s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:13:33,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:13:33,263 INFO L93 Difference]: Finished difference Result 8284 states and 33048 transitions. [2022-12-14 13:13:33,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 13:13:33,264 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 13:13:33,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:13:33,290 INFO L225 Difference]: With dead ends: 8284 [2022-12-14 13:13:33,290 INFO L226 Difference]: Without dead ends: 8284 [2022-12-14 13:13:33,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2022-12-14 13:13:33,291 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 379 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:13:33,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 74 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-12-14 13:13:33,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8284 states. [2022-12-14 13:13:33,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8284 to 4230. [2022-12-14 13:13:33,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4230 states, 4138 states have (on average 4.211213146447559) internal successors, (17426), 4229 states have internal predecessors, (17426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:13:33,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4230 states to 4230 states and 17426 transitions. [2022-12-14 13:13:33,408 INFO L78 Accepts]: Start accepts. Automaton has 4230 states and 17426 transitions. Word has length 7 [2022-12-14 13:13:33,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:33,408 INFO L495 AbstractCegarLoop]: Abstraction has 4230 states and 17426 transitions. [2022-12-14 13:13:33,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:13:33,409 INFO L276 IsEmpty]: Start isEmpty. Operand 4230 states and 17426 transitions. [2022-12-14 13:13:33,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 13:13:33,409 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:33,409 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:13:33,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2022-12-14 13:13:33,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-14 13:13:33,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 13:13:34,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:13:34,012 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:13:34,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:34,013 INFO L85 PathProgramCache]: Analyzing trace with hash -960386557, now seen corresponding path program 1 times [2022-12-14 13:13:34,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:13:34,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070498795] [2022-12-14 13:13:34,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:34,014 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:13:34,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:13:34,015 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:13:34,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-14 13:13:34,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:34,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 13:13:34,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:34,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:13:34,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:13:34,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:13:34,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:13:34,305 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 13:13:34,305 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 [2022-12-14 13:13:34,322 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 [2022-12-14 13:13:34,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:13:34,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 13:13:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:13:34,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:13:34,480 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:13:34,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070498795] [2022-12-14 13:13:34,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070498795] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:13:34,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:13:34,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:13:34,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554530560] [2022-12-14 13:13:34,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:13:34,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:13:34,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:13:34,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:13:34,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:13:34,481 INFO L87 Difference]: Start difference. First operand 4230 states and 17426 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) [2022-12-14 13:13:34,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:13:34,714 INFO L93 Difference]: Finished difference Result 4130 states and 17105 transitions. [2022-12-14 13:13:34,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:13:34,714 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 [2022-12-14 13:13:34,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:13:34,727 INFO L225 Difference]: With dead ends: 4130 [2022-12-14 13:13:34,727 INFO L226 Difference]: Without dead ends: 4130 [2022-12-14 13:13:34,727 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 [2022-12-14 13:13:34,727 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 90 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 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 [2022-12-14 13:13:34,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 6 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:13:34,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4130 states. [2022-12-14 13:13:34,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4130 to 4130. [2022-12-14 13:13:34,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4130 states, 4050 states have (on average 4.223456790123457) internal successors, (17105), 4129 states have internal predecessors, (17105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:13:34,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4130 states to 4130 states and 17105 transitions. [2022-12-14 13:13:34,802 INFO L78 Accepts]: Start accepts. Automaton has 4130 states and 17105 transitions. Word has length 7 [2022-12-14 13:13:34,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:34,802 INFO L495 AbstractCegarLoop]: Abstraction has 4130 states and 17105 transitions. [2022-12-14 13:13:34,802 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) [2022-12-14 13:13:34,802 INFO L276 IsEmpty]: Start isEmpty. Operand 4130 states and 17105 transitions. [2022-12-14 13:13:34,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 13:13:34,803 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:34,803 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:13:34,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-14 13:13:35,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:13:35,004 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:13:35,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:35,005 INFO L85 PathProgramCache]: Analyzing trace with hash -960386555, now seen corresponding path program 1 times [2022-12-14 13:13:35,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:13:35,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [538287152] [2022-12-14 13:13:35,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:35,007 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:13:35,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:13:35,010 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:13:35,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -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)] Waiting until timeout for monitored process [2022-12-14 13:13:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:35,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 13:13:35,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:35,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:13:35,234 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-12-14 13:13:35,235 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 5 case distinctions, treesize of input 36 treesize of output 63 [2022-12-14 13:13:35,304 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:13:35,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 13:13:35,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:13:35,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:13:35,347 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:13:35,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [538287152] [2022-12-14 13:13:35,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [538287152] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:13:35,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:13:35,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:13:35,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512751215] [2022-12-14 13:13:35,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:13:35,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:13:35,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:13:35,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:13:35,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:13:35,348 INFO L87 Difference]: Start difference. First operand 4130 states and 17105 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) [2022-12-14 13:13:35,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:13:35,548 INFO L93 Difference]: Finished difference Result 4030 states and 16784 transitions. [2022-12-14 13:13:35,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:13:35,549 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 [2022-12-14 13:13:35,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:13:35,564 INFO L225 Difference]: With dead ends: 4030 [2022-12-14 13:13:35,564 INFO L226 Difference]: Without dead ends: 4030 [2022-12-14 13:13:35,565 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 [2022-12-14 13:13:35,565 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:13:35,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 6 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:13:35,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4030 states. [2022-12-14 13:13:35,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4030 to 4030. [2022-12-14 13:13:35,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4030 states, 3962 states have (on average 4.236244321049975) internal successors, (16784), 4029 states have internal predecessors, (16784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:13:35,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4030 states to 4030 states and 16784 transitions. [2022-12-14 13:13:35,641 INFO L78 Accepts]: Start accepts. Automaton has 4030 states and 16784 transitions. Word has length 7 [2022-12-14 13:13:35,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:35,641 INFO L495 AbstractCegarLoop]: Abstraction has 4030 states and 16784 transitions. [2022-12-14 13:13:35,641 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) [2022-12-14 13:13:35,641 INFO L276 IsEmpty]: Start isEmpty. Operand 4030 states and 16784 transitions. [2022-12-14 13:13:35,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 13:13:35,642 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:35,642 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:13:35,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 13:13:35,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:13:35,843 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:13:35,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:35,844 INFO L85 PathProgramCache]: Analyzing trace with hash 292781811, now seen corresponding path program 1 times [2022-12-14 13:13:35,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:13:35,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [944053441] [2022-12-14 13:13:35,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:35,846 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:13:35,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:13:35,849 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:13:35,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-14 13:13:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:35,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 13:13:35,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:13:36,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:13:36,023 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:13:36,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [944053441] [2022-12-14 13:13:36,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [944053441] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:13:36,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:13:36,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:13:36,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614337437] [2022-12-14 13:13:36,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:13:36,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:13:36,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:13:36,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:13:36,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:13:36,025 INFO L87 Difference]: Start difference. First operand 4030 states and 16784 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) [2022-12-14 13:13:36,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:13:36,442 INFO L93 Difference]: Finished difference Result 5537 states and 22132 transitions. [2022-12-14 13:13:36,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:13:36,442 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 [2022-12-14 13:13:36,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:13:36,461 INFO L225 Difference]: With dead ends: 5537 [2022-12-14 13:13:36,461 INFO L226 Difference]: Without dead ends: 5537 [2022-12-14 13:13:36,461 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 [2022-12-14 13:13:36,462 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 63 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:13:36,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 18 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:13:36,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5537 states. [2022-12-14 13:13:36,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5537 to 5335. [2022-12-14 13:13:36,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5335 states, 5267 states have (on average 4.119802544142776) internal successors, (21699), 5334 states have internal predecessors, (21699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:13:36,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5335 states to 5335 states and 21699 transitions. [2022-12-14 13:13:36,566 INFO L78 Accepts]: Start accepts. Automaton has 5335 states and 21699 transitions. Word has length 8 [2022-12-14 13:13:36,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:36,566 INFO L495 AbstractCegarLoop]: Abstraction has 5335 states and 21699 transitions. [2022-12-14 13:13:36,566 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) [2022-12-14 13:13:36,566 INFO L276 IsEmpty]: Start isEmpty. Operand 5335 states and 21699 transitions. [2022-12-14 13:13:36,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 13:13:36,567 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:36,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:13:36,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-14 13:13:36,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:13:36,769 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:13:36,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:36,769 INFO L85 PathProgramCache]: Analyzing trace with hash 486517996, now seen corresponding path program 1 times [2022-12-14 13:13:36,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:13:36,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1384120715] [2022-12-14 13:13:36,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:36,771 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:13:36,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:13:36,773 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:13:36,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-14 13:13:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:36,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 13:13:36,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:36,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:13:36,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:13:36,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:13:36,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:13:37,096 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 13:13:37,096 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 [2022-12-14 13:13:37,107 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 22 treesize of output 20 [2022-12-14 13:13:37,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:13:37,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 13:13:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:13:37,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:13:37,237 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:13:37,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1384120715] [2022-12-14 13:13:37,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1384120715] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:13:37,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:13:37,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:13:37,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299141622] [2022-12-14 13:13:37,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:13:37,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:13:37,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:13:37,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:13:37,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:13:37,238 INFO L87 Difference]: Start difference. First operand 5335 states and 21699 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) [2022-12-14 13:13:37,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:13:37,516 INFO L93 Difference]: Finished difference Result 5054 states and 20566 transitions. [2022-12-14 13:13:37,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:13:37,517 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 [2022-12-14 13:13:37,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:13:37,533 INFO L225 Difference]: With dead ends: 5054 [2022-12-14 13:13:37,533 INFO L226 Difference]: Without dead ends: 5054 [2022-12-14 13:13:37,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:13:37,534 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 80 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:13:37,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 6 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:13:37,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5054 states. [2022-12-14 13:13:37,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5054 to 5054. [2022-12-14 13:13:37,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5054 states, 5001 states have (on average 4.112377524495101) internal successors, (20566), 5053 states have internal predecessors, (20566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:13:37,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5054 states to 5054 states and 20566 transitions. [2022-12-14 13:13:37,628 INFO L78 Accepts]: Start accepts. Automaton has 5054 states and 20566 transitions. Word has length 9 [2022-12-14 13:13:37,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:37,628 INFO L495 AbstractCegarLoop]: Abstraction has 5054 states and 20566 transitions. [2022-12-14 13:13:37,628 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) [2022-12-14 13:13:37,629 INFO L276 IsEmpty]: Start isEmpty. Operand 5054 states and 20566 transitions. [2022-12-14 13:13:37,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 13:13:37,629 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:37,629 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:13:37,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-12-14 13:13:37,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:13:37,830 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:13:37,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:37,831 INFO L85 PathProgramCache]: Analyzing trace with hash 486517997, now seen corresponding path program 1 times [2022-12-14 13:13:37,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:13:37,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1962960829] [2022-12-14 13:13:37,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:37,831 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:13:37,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:13:37,833 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:13:37,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-14 13:13:37,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:37,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 13:13:37,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:38,055 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2022-12-14 13:13:38,055 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 [2022-12-14 13:13:38,081 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:13:38,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 13:13:38,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:13:38,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:13:38,096 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:13:38,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1962960829] [2022-12-14 13:13:38,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1962960829] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:13:38,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:13:38,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:13:38,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746495698] [2022-12-14 13:13:38,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:13:38,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:13:38,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:13:38,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:13:38,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:13:38,098 INFO L87 Difference]: Start difference. First operand 5054 states and 20566 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) [2022-12-14 13:13:38,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:13:38,285 INFO L93 Difference]: Finished difference Result 4773 states and 19433 transitions. [2022-12-14 13:13:38,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:13:38,286 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 [2022-12-14 13:13:38,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:13:38,300 INFO L225 Difference]: With dead ends: 4773 [2022-12-14 13:13:38,300 INFO L226 Difference]: Without dead ends: 4773 [2022-12-14 13:13:38,300 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 [2022-12-14 13:13:38,301 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-12-14 13:13:38,301 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] [2022-12-14 13:13:38,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4773 states. [2022-12-14 13:13:38,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4773 to 4773. [2022-12-14 13:13:38,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4773 states, 4735 states have (on average 4.104118268215417) internal successors, (19433), 4772 states have internal predecessors, (19433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:13:38,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4773 states to 4773 states and 19433 transitions. [2022-12-14 13:13:38,395 INFO L78 Accepts]: Start accepts. Automaton has 4773 states and 19433 transitions. Word has length 9 [2022-12-14 13:13:38,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:38,395 INFO L495 AbstractCegarLoop]: Abstraction has 4773 states and 19433 transitions. [2022-12-14 13:13:38,395 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) [2022-12-14 13:13:38,395 INFO L276 IsEmpty]: Start isEmpty. Operand 4773 states and 19433 transitions. [2022-12-14 13:13:38,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 13:13:38,395 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:38,395 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:13:38,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 13:13:38,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:13:38,596 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:13:38,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:38,597 INFO L85 PathProgramCache]: Analyzing trace with hash -557067876, now seen corresponding path program 1 times [2022-12-14 13:13:38,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:13:38,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [105928265] [2022-12-14 13:13:38,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:38,597 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:13:38,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:13:38,598 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:13:38,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-12-14 13:13:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:38,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 13:13:38,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:38,711 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 [2022-12-14 13:13:38,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:13:38,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:13:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:13:39,714 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:13:39,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [105928265] [2022-12-14 13:13:39,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [105928265] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:13:39,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [896430723] [2022-12-14 13:13:39,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:39,714 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:13:39,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:13:39,715 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:13:39,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-12-14 13:13:39,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:39,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 13:13:39,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:39,869 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 [2022-12-14 13:13:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:13:40,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:13:40,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:13:40,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [896430723] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:13:40,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570209789] [2022-12-14 13:13:40,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:40,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:13:40,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:13:40,848 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:13:40,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 13:13:40,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:40,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 13:13:40,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:40,938 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 [2022-12-14 13:13:41,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:13:41,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:13:41,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:13:41,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570209789] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:13:41,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:13:41,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-12-14 13:13:41,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799329748] [2022-12-14 13:13:41,396 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:13:41,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 13:13:41,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:13:41,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 13:13:41,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:13:41,397 INFO L87 Difference]: Start difference. First operand 4773 states and 19433 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:13:47,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:13:47,750 INFO L93 Difference]: Finished difference Result 9869 states and 40546 transitions. [2022-12-14 13:13:47,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 13:13:47,751 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 11 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 9 [2022-12-14 13:13:47,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:13:47,779 INFO L225 Difference]: With dead ends: 9869 [2022-12-14 13:13:47,779 INFO L226 Difference]: Without dead ends: 9869 [2022-12-14 13:13:47,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-12-14 13:13:47,780 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 457 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:13:47,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 53 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-12-14 13:13:47,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9869 states. [2022-12-14 13:13:47,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9869 to 6822. [2022-12-14 13:13:47,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6822 states, 6784 states have (on average 4.24941037735849) internal successors, (28828), 6821 states have internal predecessors, (28828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:13:47,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6822 states to 6822 states and 28828 transitions. [2022-12-14 13:13:47,925 INFO L78 Accepts]: Start accepts. Automaton has 6822 states and 28828 transitions. Word has length 9 [2022-12-14 13:13:47,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:47,926 INFO L495 AbstractCegarLoop]: Abstraction has 6822 states and 28828 transitions. [2022-12-14 13:13:47,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:13:47,926 INFO L276 IsEmpty]: Start isEmpty. Operand 6822 states and 28828 transitions. [2022-12-14 13:13:47,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 13:13:47,926 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:47,926 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:13:47,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2022-12-14 13:13:48,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-14 13:13:48,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 13:13:48,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:13:48,529 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:13:48,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:48,530 INFO L85 PathProgramCache]: Analyzing trace with hash -557067875, now seen corresponding path program 1 times [2022-12-14 13:13:48,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:13:48,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107169158] [2022-12-14 13:13:48,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:48,531 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:13:48,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:13:48,534 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:13:48,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-12-14 13:13:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:48,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 13:13:48,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:48,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 13:13:48,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:13:48,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:13:48,676 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:13:48,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107169158] [2022-12-14 13:13:48,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107169158] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:13:48,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:13:48,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:13:48,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494053875] [2022-12-14 13:13:48,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:13:48,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:13:48,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:13:48,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:13:48,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:13:48,677 INFO L87 Difference]: Start difference. First operand 6822 states and 28828 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) [2022-12-14 13:13:48,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:13:48,864 INFO L93 Difference]: Finished difference Result 5134 states and 20985 transitions. [2022-12-14 13:13:48,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:13:48,864 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 9 [2022-12-14 13:13:48,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:13:48,878 INFO L225 Difference]: With dead ends: 5134 [2022-12-14 13:13:48,878 INFO L226 Difference]: Without dead ends: 5134 [2022-12-14 13:13:48,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:13:48,879 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 68 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:13:48,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 6 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:13:48,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5134 states. [2022-12-14 13:13:48,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5134 to 5134. [2022-12-14 13:13:48,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5134 states, 5116 states have (on average 4.101837372947616) internal successors, (20985), 5133 states have internal predecessors, (20985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:13:48,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5134 states to 5134 states and 20985 transitions. [2022-12-14 13:13:48,990 INFO L78 Accepts]: Start accepts. Automaton has 5134 states and 20985 transitions. Word has length 9 [2022-12-14 13:13:48,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:48,990 INFO L495 AbstractCegarLoop]: Abstraction has 5134 states and 20985 transitions. [2022-12-14 13:13:48,990 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) [2022-12-14 13:13:48,990 INFO L276 IsEmpty]: Start isEmpty. Operand 5134 states and 20985 transitions. [2022-12-14 13:13:48,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 13:13:48,991 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:48,991 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-14 13:13:48,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-12-14 13:13:49,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:13:49,192 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:13:49,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:49,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1566910428, now seen corresponding path program 2 times [2022-12-14 13:13:49,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:13:49,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [616919818] [2022-12-14 13:13:49,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:13:49,195 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:13:49,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:13:49,197 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:13:49,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-12-14 13:13:49,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 13:13:49,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:13:49,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 13:13:49,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:49,634 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 13:13:49,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 13:13:49,819 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-14 13:13:49,819 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 [2022-12-14 13:13:49,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:13:49,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:13:49,942 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 13:13:49,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 13:13:49,980 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 13:13:49,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:13:49,981 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:13:49,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [616919818] [2022-12-14 13:13:49,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [616919818] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:13:49,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:13:49,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:13:49,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703978052] [2022-12-14 13:13:49,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:13:49,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:13:49,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:13:49,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:13:49,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:13:49,982 INFO L87 Difference]: Start difference. First operand 5134 states and 20985 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) [2022-12-14 13:13:50,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:13:50,212 INFO L93 Difference]: Finished difference Result 4226 states and 17145 transitions. [2022-12-14 13:13:50,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:13:50,213 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 [2022-12-14 13:13:50,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:13:50,223 INFO L225 Difference]: With dead ends: 4226 [2022-12-14 13:13:50,224 INFO L226 Difference]: Without dead ends: 4226 [2022-12-14 13:13:50,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:13:50,224 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 33 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:13:50,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 12 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:13:50,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2022-12-14 13:13:50,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 2764. [2022-12-14 13:13:50,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2764 states, 2758 states have (on average 3.928208846990573) internal successors, (10834), 2763 states have internal predecessors, (10834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:13:50,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 10834 transitions. [2022-12-14 13:13:50,278 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 10834 transitions. Word has length 10 [2022-12-14 13:13:50,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:50,278 INFO L495 AbstractCegarLoop]: Abstraction has 2764 states and 10834 transitions. [2022-12-14 13:13:50,278 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) [2022-12-14 13:13:50,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 10834 transitions. [2022-12-14 13:13:50,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 13:13:50,279 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:50,279 INFO L195 NwaCegarLoop]: trace histogram [8, 1, 1, 1] [2022-12-14 13:13:50,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-12-14 13:13:50,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:13:50,480 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:13:50,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:50,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1972312097, now seen corresponding path program 1 times [2022-12-14 13:13:50,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:13:50,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619101023] [2022-12-14 13:13:50,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:50,483 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:13:50,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:13:50,485 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:13:50,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-12-14 13:13:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:50,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 13:13:50,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:50,761 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 [2022-12-14 13:13:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:13:51,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:13:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:13:52,932 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:13:52,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619101023] [2022-12-14 13:13:52,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619101023] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:13:52,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [175945712] [2022-12-14 13:13:52,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:52,932 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:13:52,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:13:52,933 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:13:52,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-12-14 13:13:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:53,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 13:13:53,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:53,137 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 [2022-12-14 13:13:53,564 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:13:53,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:13:54,161 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:13:54,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [175945712] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:13:54,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901154008] [2022-12-14 13:13:54,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:54,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:13:54,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:13:54,162 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:13:54,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-14 13:13:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:54,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 13:13:54,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:54,302 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 [2022-12-14 13:13:54,414 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:13:54,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:13:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:13:54,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901154008] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:13:54,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:13:54,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 27 [2022-12-14 13:13:54,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459367093] [2022-12-14 13:13:54,737 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:13:54,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 13:13:54,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:13:54,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 13:13:54,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2022-12-14 13:13:54,738 INFO L87 Difference]: Start difference. First operand 2764 states and 10834 transitions. Second operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:13:59,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:14:01,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:14:03,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:14:05,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:14:07,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:14:09,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:14:11,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:14:13,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:14:33,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:14:33,381 INFO L93 Difference]: Finished difference Result 21967 states and 87742 transitions. [2022-12-14 13:14:33,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 13:14:33,382 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 13:14:33,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:14:33,468 INFO L225 Difference]: With dead ends: 21967 [2022-12-14 13:14:33,468 INFO L226 Difference]: Without dead ends: 21967 [2022-12-14 13:14:33,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=719, Invalid=1261, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 13:14:33,469 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 3599 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 3295 mSolverCounterSat, 83 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3599 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 3384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 3295 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:14:33,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3599 Valid, 666 Invalid, 3384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 3295 Invalid, 6 Unknown, 0 Unchecked, 25.3s Time] [2022-12-14 13:14:33,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21967 states. [2022-12-14 13:14:33,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21967 to 2785. [2022-12-14 13:14:33,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2785 states, 2779 states have (on average 3.9136379992803167) internal successors, (10876), 2784 states have internal predecessors, (10876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:14:33,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 10876 transitions. [2022-12-14 13:14:33,638 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 10876 transitions. Word has length 11 [2022-12-14 13:14:33,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:14:33,638 INFO L495 AbstractCegarLoop]: Abstraction has 2785 states and 10876 transitions. [2022-12-14 13:14:33,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:14:33,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 10876 transitions. [2022-12-14 13:14:33,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 13:14:33,639 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:14:33,639 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:14:33,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-14 13:14:33,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-12-14 13:14:34,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-12-14 13:14:34,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -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_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 13:14:34,241 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:14:34,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:14:34,243 INFO L85 PathProgramCache]: Analyzing trace with hash -834182861, now seen corresponding path program 2 times [2022-12-14 13:14:34,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:14:34,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1958680668] [2022-12-14 13:14:34,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:14:34,245 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:14:34,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:14:34,247 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:14:34,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-12-14 13:14:34,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 13:14:34,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:14:34,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 13:14:34,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:14:34,390 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 [2022-12-14 13:14:34,485 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 13:14:34,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:14:34,486 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:14:34,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1958680668] [2022-12-14 13:14:34,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1958680668] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:14:34,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:14:34,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:14:34,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935765879] [2022-12-14 13:14:34,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:14:34,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:14:34,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:14:34,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:14:34,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:14:34,487 INFO L87 Difference]: Start difference. First operand 2785 states and 10876 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) [2022-12-14 13:14:34,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:14:34,691 INFO L93 Difference]: Finished difference Result 2303 states and 8890 transitions. [2022-12-14 13:14:34,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:14:34,692 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 [2022-12-14 13:14:34,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:14:34,697 INFO L225 Difference]: With dead ends: 2303 [2022-12-14 13:14:34,697 INFO L226 Difference]: Without dead ends: 2303 [2022-12-14 13:14:34,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:14:34,698 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 58 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:14:34,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 6 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:14:34,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2022-12-14 13:14:34,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 1519. [2022-12-14 13:14:34,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1516 states have (on average 3.7269129287598943) internal successors, (5650), 1518 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:14:34,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 5650 transitions. [2022-12-14 13:14:34,723 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 5650 transitions. Word has length 12 [2022-12-14 13:14:34,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:14:34,723 INFO L495 AbstractCegarLoop]: Abstraction has 1519 states and 5650 transitions. [2022-12-14 13:14:34,723 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) [2022-12-14 13:14:34,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 5650 transitions. [2022-12-14 13:14:34,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 13:14:34,724 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:14:34,724 INFO L195 NwaCegarLoop]: trace histogram [11, 1, 1] [2022-12-14 13:14:34,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-12-14 13:14:34,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:14:34,925 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:14:34,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:14:34,927 INFO L85 PathProgramCache]: Analyzing trace with hash -715791856, now seen corresponding path program 3 times [2022-12-14 13:14:34,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:14:34,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2054188875] [2022-12-14 13:14:34,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:14:34,928 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:14:34,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:14:34,931 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:14:34,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-12-14 13:14:35,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 13:14:35,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:14:35,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 13:14:35,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:14:35,395 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 13:14:35,395 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 [2022-12-14 13:14:35,895 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:14:35,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:14:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:14:39,448 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:14:39,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2054188875] [2022-12-14 13:14:39,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2054188875] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:14:39,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [858800484] [2022-12-14 13:14:39,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:14:39,448 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:14:39,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:14:39,449 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:14:39,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-12-14 13:14:40,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 13:14:40,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:14:40,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 13:14:40,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:14:40,749 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 13:14:40,749 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 [2022-12-14 13:14:41,047 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:14:41,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:14:45,811 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:14:45,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [858800484] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:14:45,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500555783] [2022-12-14 13:14:45,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:14:45,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:14:45,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:14:45,813 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:14:45,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-14 13:14:51,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 13:14:51,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:14:51,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 13:14:51,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:14:51,772 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 13:14:51,772 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 [2022-12-14 13:14:51,947 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:14:51,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:14:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:14:52,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500555783] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:14:52,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:14:52,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 37 [2022-12-14 13:14:52,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717451771] [2022-12-14 13:14:52,349 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:14:52,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 13:14:52,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:14:52,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 13:14:52,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=1064, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 13:14:52,350 INFO L87 Difference]: Start difference. First operand 1519 states and 5650 transitions. Second operand has 39 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:15:06,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:15:08,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:15:10,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:15:12,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:15:14,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:15:16,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:15:18,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:15:20,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:15:22,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:15:24,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:15:26,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:15:28,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:15:30,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:15:32,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:15:34,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:15:46,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:15:46,568 INFO L93 Difference]: Finished difference Result 11824 states and 46428 transitions. [2022-12-14 13:15:46,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 13:15:46,569 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 13:15:46,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:15:46,600 INFO L225 Difference]: With dead ends: 11824 [2022-12-14 13:15:46,600 INFO L226 Difference]: Without dead ends: 11824 [2022-12-14 13:15:46,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=792, Invalid=1658, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 13:15:46,601 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 3841 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 4795 mSolverCounterSat, 151 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3841 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 4960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 4795 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:15:46,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3841 Valid, 1013 Invalid, 4960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 4795 Invalid, 14 Unknown, 0 Unchecked, 38.1s Time] [2022-12-14 13:15:46,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11824 states. [2022-12-14 13:15:46,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11824 to 1532. [2022-12-14 13:15:46,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1529 states have (on average 3.712230215827338) internal successors, (5676), 1531 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:15:46,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 5676 transitions. [2022-12-14 13:15:46,693 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 5676 transitions. Word has length 13 [2022-12-14 13:15:46,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:15:46,694 INFO L495 AbstractCegarLoop]: Abstraction has 1532 states and 5676 transitions. [2022-12-14 13:15:46,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:15:46,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 5676 transitions. [2022-12-14 13:15:46,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 13:15:46,697 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:15:46,697 INFO L195 NwaCegarLoop]: trace histogram [18, 1, 1, 1] [2022-12-14 13:15:46,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-12-14 13:15:46,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-14 13:15:47,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2022-12-14 13:15:47,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 13:15:47,300 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:15:47,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:15:47,301 INFO L85 PathProgramCache]: Analyzing trace with hash -31512001, now seen corresponding path program 2 times [2022-12-14 13:15:47,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:15:47,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1107671895] [2022-12-14 13:15:47,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:15:47,302 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:15:47,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:15:47,304 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:15:47,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-12-14 13:15:47,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:15:47,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:15:47,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 13:15:47,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:15:47,512 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 [2022-12-14 13:15:48,369 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:15:48,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:15:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:15:54,935 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:15:54,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1107671895] [2022-12-14 13:15:54,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1107671895] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:15:54,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [694211280] [2022-12-14 13:15:54,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:15:54,935 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:15:54,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:15:54,936 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:15:54,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-12-14 13:15:55,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:15:55,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:15:55,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 13:15:55,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:15:55,400 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 [2022-12-14 13:15:55,708 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:15:55,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:16:07,391 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:16:07,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [694211280] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:16:07,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750370249] [2022-12-14 13:16:07,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:16:07,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:16:07,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:16:07,393 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:16:07,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-14 13:16:07,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:16:07,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:16:07,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 13:16:07,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:16:07,611 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 [2022-12-14 13:16:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:16:07,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:16:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:16:08,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750370249] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:16:08,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:16:08,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20, 20, 20, 20] total 58 [2022-12-14 13:16:08,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133035024] [2022-12-14 13:16:08,776 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:16:08,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-12-14 13:16:08,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:16:08,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-12-14 13:16:08,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=874, Invalid=2548, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 13:16:08,777 INFO L87 Difference]: Start difference. First operand 1532 states and 5676 transitions. Second operand has 59 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:16:24,044 WARN L233 SmtUtils]: Spent 7.42s on a formula simplification that was a NOOP. DAG size: 209 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:16:26,563 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 [] [2022-12-14 13:16:28,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:16:30,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:16:32,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:16:34,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:16:36,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:16:38,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:16:40,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:16:42,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:16:44,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:16:46,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:16:48,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:16:50,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:16:52,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:16:54,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:16:56,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:16:58,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:17:00,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:17:02,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:17:04,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:17:06,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:17:08,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:17:10,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:17:12,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:17:14,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:17:16,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:17:18,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:17:20,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:17:22,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:17:24,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:17:26,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:17:28,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:17:30,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:17:33,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:17:42,487 WARN L233 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 198 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:17:51,497 WARN L233 SmtUtils]: Spent 6.43s on a formula simplification that was a NOOP. DAG size: 187 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:17:58,579 WARN L233 SmtUtils]: Spent 5.36s on a formula simplification that was a NOOP. DAG size: 177 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:18:52,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:18:52,484 INFO L93 Difference]: Finished difference Result 32312 states and 127724 transitions. [2022-12-14 13:18:52,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-14 13:18:52,486 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 59 states have internal predecessors, (62), 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 21 [2022-12-14 13:18:52,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:18:52,580 INFO L225 Difference]: With dead ends: 32312 [2022-12-14 13:18:52,580 INFO L226 Difference]: Without dead ends: 32312 [2022-12-14 13:18:52,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 80.8s TimeCoverageRelationStatistics Valid=1783, Invalid=4069, Unknown=0, NotChecked=0, Total=5852 [2022-12-14 13:18:52,581 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 18093 mSDsluCounter, 2196 mSDsCounter, 0 mSdLazyCounter, 10932 mSolverCounterSat, 343 mSolverCounterUnsat, 32 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18093 SdHoareTripleChecker+Valid, 2309 SdHoareTripleChecker+Invalid, 11307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 10932 IncrementalHoareTripleChecker+Invalid, 32 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 100.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:18:52,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18093 Valid, 2309 Invalid, 11307 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [343 Valid, 10932 Invalid, 32 Unknown, 0 Unchecked, 100.0s Time] [2022-12-14 13:18:52,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32312 states. [2022-12-14 13:18:52,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32312 to 1572. [2022-12-14 13:18:52,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1569 states have (on average 3.668578712555768) internal successors, (5756), 1571 states have internal predecessors, (5756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:18:52,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 5756 transitions. [2022-12-14 13:18:52,841 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 5756 transitions. Word has length 21 [2022-12-14 13:18:52,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:18:52,841 INFO L495 AbstractCegarLoop]: Abstraction has 1572 states and 5756 transitions. [2022-12-14 13:18:52,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:18:52,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 5756 transitions. [2022-12-14 13:18:52,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 13:18:52,845 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:18:52,845 INFO L195 NwaCegarLoop]: trace histogram [24, 1, 1] [2022-12-14 13:18:52,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-12-14 13:18:53,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-14 13:18:53,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-12-14 13:18:53,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 13:18:53,447 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:18:53,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:18:53,449 INFO L85 PathProgramCache]: Analyzing trace with hash -275322003, now seen corresponding path program 4 times [2022-12-14 13:18:53,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:18:53,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18810026] [2022-12-14 13:18:53,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:18:53,450 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:18:53,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:18:53,450 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:18:53,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-12-14 13:18:53,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:18:53,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:18:53,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-14 13:18:53,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:18:53,860 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 13:18:53,861 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 [2022-12-14 13:18:55,326 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:18:55,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:19:08,511 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:19:08,511 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:19:08,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18810026] [2022-12-14 13:19:08,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18810026] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:19:08,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [461272415] [2022-12-14 13:19:08,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:19:08,512 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:19:08,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:19:08,513 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:19:08,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-12-14 13:19:09,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:19:09,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:19:09,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 13:19:09,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:19:09,246 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 13:19:09,246 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 [2022-12-14 13:19:11,038 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:19:11,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:19:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:19:12,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [461272415] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:19:12,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148189310] [2022-12-14 13:19:12,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:19:12,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:19:12,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:19:12,744 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:19:12,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-14 13:19:12,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:19:12,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:19:12,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-14 13:19:12,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:19:13,139 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 13:19:13,139 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 [2022-12-14 13:19:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:19:13,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:19:14,826 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:19:14,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148189310] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:19:14,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:19:14,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 25, 25, 25] total 66 [2022-12-14 13:19:14,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642374993] [2022-12-14 13:19:14,827 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:19:14,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-14 13:19:14,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:19:14,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-14 13:19:14,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=3367, Unknown=0, NotChecked=0, Total=4556 [2022-12-14 13:19:14,830 INFO L87 Difference]: Start difference. First operand 1572 states and 5756 transitions. Second operand has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:19:56,799 WARN L233 SmtUtils]: Spent 22.63s on a formula simplification that was a NOOP. DAG size: 275 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:20:14,843 WARN L233 SmtUtils]: Spent 15.50s on a formula simplification that was a NOOP. DAG size: 265 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:20:30,040 WARN L233 SmtUtils]: Spent 12.54s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:20:33,123 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 [] [2022-12-14 13:20:35,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:20:37,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:20:39,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:20:41,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:20:43,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:20:45,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:20:47,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:20:49,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:20:51,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:20:53,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:20:55,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:20:57,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:20:59,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:21:01,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:21:03,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:21:05,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:21:07,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:21:09,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:21:11,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:21:13,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:21:15,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:21:17,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:21:19,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:21:34,092 WARN L233 SmtUtils]: Spent 13.44s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:21:49,108 WARN L233 SmtUtils]: Spent 11.58s 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) [2022-12-14 13:22:05,559 WARN L233 SmtUtils]: Spent 13.98s 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) [2022-12-14 13:22:25,652 WARN L233 SmtUtils]: Spent 10.71s 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) [2022-12-14 13:22:38,456 WARN L233 SmtUtils]: Spent 10.54s 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) [2022-12-14 13:23:28,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:23:28,311 INFO L93 Difference]: Finished difference Result 22966 states and 90552 transitions. [2022-12-14 13:23:28,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-14 13:23:28,313 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 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 26 [2022-12-14 13:23:28,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:23:28,377 INFO L225 Difference]: With dead ends: 22966 [2022-12-14 13:23:28,377 INFO L226 Difference]: Without dead ends: 22966 [2022-12-14 13:23:28,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 79 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2266 ImplicationChecksByTransitivity, 186.3s TimeCoverageRelationStatistics Valid=2843, Invalid=5713, Unknown=0, NotChecked=0, Total=8556 [2022-12-14 13:23:28,379 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 8047 mSDsluCounter, 4864 mSDsCounter, 0 mSdLazyCounter, 23559 mSolverCounterSat, 963 mSolverCounterUnsat, 24 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8047 SdHoareTripleChecker+Valid, 5013 SdHoareTripleChecker+Invalid, 24546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 963 IncrementalHoareTripleChecker+Valid, 23559 IncrementalHoareTripleChecker+Invalid, 24 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 82.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:23:28,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8047 Valid, 5013 Invalid, 24546 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [963 Valid, 23559 Invalid, 24 Unknown, 0 Unchecked, 82.1s Time] [2022-12-14 13:23:28,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22966 states. [2022-12-14 13:23:28,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22966 to 1598. [2022-12-14 13:23:28,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1595 states have (on average 3.6413793103448278) internal successors, (5808), 1597 states have internal predecessors, (5808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:28,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 5808 transitions. [2022-12-14 13:23:28,551 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 5808 transitions. Word has length 26 [2022-12-14 13:23:28,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:23:28,552 INFO L495 AbstractCegarLoop]: Abstraction has 1598 states and 5808 transitions. [2022-12-14 13:23:28,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:28,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 5808 transitions. [2022-12-14 13:23:28,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 13:23:28,555 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:23:28,555 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] [2022-12-14 13:23:28,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-12-14 13:23:28,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-12-14 13:23:28,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-14 13:23:29,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:23:29,157 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:23:29,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:23:29,159 INFO L85 PathProgramCache]: Analyzing trace with hash 123767578, now seen corresponding path program 1 times [2022-12-14 13:23:29,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:23:29,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [806016089] [2022-12-14 13:23:29,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:23:29,160 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:23:29,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:23:29,161 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:23:29,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-12-14 13:23:29,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:23:29,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 13:23:29,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:23:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:23:29,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:23:29,462 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:23:29,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [806016089] [2022-12-14 13:23:29,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [806016089] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:23:29,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:23:29,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:23:29,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441705038] [2022-12-14 13:23:29,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:23:29,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:23:29,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:23:29,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:23:29,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:23:29,463 INFO L87 Difference]: Start difference. First operand 1598 states and 5808 transitions. Second operand has 3 states, 2 states have (on average 13.5) internal successors, (27), 2 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) [2022-12-14 13:23:29,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:23:29,661 INFO L93 Difference]: Finished difference Result 2153 states and 8017 transitions. [2022-12-14 13:23:29,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:23:29,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 2 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 [2022-12-14 13:23:29,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:23:29,667 INFO L225 Difference]: With dead ends: 2153 [2022-12-14 13:23:29,667 INFO L226 Difference]: Without dead ends: 1729 [2022-12-14 13:23:29,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:23:29,668 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:23:29,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 12 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:23:29,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2022-12-14 13:23:29,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1729. [2022-12-14 13:23:29,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1726 states have (on average 3.780417149478563) internal successors, (6525), 1728 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:29,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 6525 transitions. [2022-12-14 13:23:29,693 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 6525 transitions. Word has length 27 [2022-12-14 13:23:29,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:23:29,693 INFO L495 AbstractCegarLoop]: Abstraction has 1729 states and 6525 transitions. [2022-12-14 13:23:29,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 2 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) [2022-12-14 13:23:29,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 6525 transitions. [2022-12-14 13:23:29,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 13:23:29,696 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:23:29,696 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, 1, 1, 1] [2022-12-14 13:23:29,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-12-14 13:23:29,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:23:29,898 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:23:29,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:23:29,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1479302359, now seen corresponding path program 1 times [2022-12-14 13:23:29,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:23:29,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1667149474] [2022-12-14 13:23:29,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:23:29,901 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:23:29,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:23:29,904 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:23:29,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-12-14 13:23:30,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:23:30,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 13:23:30,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:23:30,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:23:30,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:23:30,238 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:23:30,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1667149474] [2022-12-14 13:23:30,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1667149474] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:23:30,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:23:30,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 13:23:30,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183918918] [2022-12-14 13:23:30,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:23:30,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:23:30,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:23:30,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:23:30,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:23:30,240 INFO L87 Difference]: Start difference. First operand 1729 states and 6525 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:31,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:23:31,342 INFO L93 Difference]: Finished difference Result 2781 states and 9906 transitions. [2022-12-14 13:23:31,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 13:23:31,343 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 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 30 [2022-12-14 13:23:31,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:23:31,350 INFO L225 Difference]: With dead ends: 2781 [2022-12-14 13:23:31,350 INFO L226 Difference]: Without dead ends: 2605 [2022-12-14 13:23:31,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:23:31,350 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 139 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 13:23:31,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 21 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 13:23:31,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2022-12-14 13:23:31,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 1753. [2022-12-14 13:23:31,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1750 states have (on average 3.82) internal successors, (6685), 1752 states have internal predecessors, (6685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:31,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 6685 transitions. [2022-12-14 13:23:31,384 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 6685 transitions. Word has length 30 [2022-12-14 13:23:31,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:23:31,385 INFO L495 AbstractCegarLoop]: Abstraction has 1753 states and 6685 transitions. [2022-12-14 13:23:31,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:31,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 6685 transitions. [2022-12-14 13:23:31,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 13:23:31,387 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:23:31,388 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, 1, 1, 1] [2022-12-14 13:23:31,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-12-14 13:23:31,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:23:31,589 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:23:31,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:23:31,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1210421882, now seen corresponding path program 1 times [2022-12-14 13:23:31,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:23:31,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1184025503] [2022-12-14 13:23:31,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:23:31,592 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:23:31,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:23:31,595 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:23:31,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-12-14 13:23:31,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:23:31,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:23:31,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:23:32,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:23:32,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:23:32,023 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:23:32,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1184025503] [2022-12-14 13:23:32,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1184025503] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:23:32,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:23:32,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:23:32,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321164204] [2022-12-14 13:23:32,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:23:32,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:23:32,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:23:32,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:23:32,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:23:32,025 INFO L87 Difference]: Start difference. First operand 1753 states and 6685 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:32,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:23:32,239 INFO L93 Difference]: Finished difference Result 2149 states and 8022 transitions. [2022-12-14 13:23:32,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:23:32,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 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 30 [2022-12-14 13:23:32,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:23:32,246 INFO L225 Difference]: With dead ends: 2149 [2022-12-14 13:23:32,246 INFO L226 Difference]: Without dead ends: 2055 [2022-12-14 13:23:32,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:23:32,246 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:23:32,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 8 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:23:32,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2022-12-14 13:23:32,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 1823. [2022-12-14 13:23:32,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1823 states, 1820 states have (on average 3.832967032967033) internal successors, (6976), 1822 states have internal predecessors, (6976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:32,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1823 states to 1823 states and 6976 transitions. [2022-12-14 13:23:32,295 INFO L78 Accepts]: Start accepts. Automaton has 1823 states and 6976 transitions. Word has length 30 [2022-12-14 13:23:32,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:23:32,295 INFO L495 AbstractCegarLoop]: Abstraction has 1823 states and 6976 transitions. [2022-12-14 13:23:32,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:32,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1823 states and 6976 transitions. [2022-12-14 13:23:32,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 13:23:32,298 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:23:32,298 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, 1, 1, 1, 1] [2022-12-14 13:23:32,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-12-14 13:23:32,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:23:32,499 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:23:32,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:23:32,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1192641995, now seen corresponding path program 1 times [2022-12-14 13:23:32,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:23:32,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2029633079] [2022-12-14 13:23:32,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:23:32,503 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:23:32,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:23:32,506 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:23:32,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-12-14 13:23:32,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:23:32,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:23:32,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:23:33,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:23:33,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:23:33,088 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:23:33,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2029633079] [2022-12-14 13:23:33,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2029633079] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:23:33,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:23:33,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 13:23:33,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839871949] [2022-12-14 13:23:33,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:23:33,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:23:33,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:23:33,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:23:33,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:23:33,089 INFO L87 Difference]: Start difference. First operand 1823 states and 6976 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:33,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:23:33,966 INFO L93 Difference]: Finished difference Result 1931 states and 7273 transitions. [2022-12-14 13:23:33,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 13:23:33,967 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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 31 [2022-12-14 13:23:33,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:23:33,972 INFO L225 Difference]: With dead ends: 1931 [2022-12-14 13:23:33,972 INFO L226 Difference]: Without dead ends: 1895 [2022-12-14 13:23:33,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-12-14 13:23:33,972 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 90 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:23:33,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 6 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 13:23:33,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2022-12-14 13:23:33,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1861. [2022-12-14 13:23:33,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1861 states, 1858 states have (on average 3.804090419806243) internal successors, (7068), 1860 states have internal predecessors, (7068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:33,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1861 states to 1861 states and 7068 transitions. [2022-12-14 13:23:33,999 INFO L78 Accepts]: Start accepts. Automaton has 1861 states and 7068 transitions. Word has length 31 [2022-12-14 13:23:33,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:23:33,999 INFO L495 AbstractCegarLoop]: Abstraction has 1861 states and 7068 transitions. [2022-12-14 13:23:33,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:34,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1861 states and 7068 transitions. [2022-12-14 13:23:34,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 13:23:34,003 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:23:34,003 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, 1, 1, 1, 1] [2022-12-14 13:23:34,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-12-14 13:23:34,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:23:34,204 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:23:34,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:23:34,205 INFO L85 PathProgramCache]: Analyzing trace with hash 566140181, now seen corresponding path program 2 times [2022-12-14 13:23:34,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:23:34,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888923986] [2022-12-14 13:23:34,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:23:34,207 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:23:34,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:23:34,210 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:23:34,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-12-14 13:23:34,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:23:34,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:23:34,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:23:34,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:23:34,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:23:34,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:23:35,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:23:35,030 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:23:35,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888923986] [2022-12-14 13:23:35,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888923986] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 13:23:35,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:23:35,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2022-12-14 13:23:35,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789077271] [2022-12-14 13:23:35,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:23:35,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:23:35,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:23:35,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:23:35,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-12-14 13:23:35,031 INFO L87 Difference]: Start difference. First operand 1861 states and 7068 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:36,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:23:36,168 INFO L93 Difference]: Finished difference Result 3187 states and 11469 transitions. [2022-12-14 13:23:36,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:23:36,169 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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 31 [2022-12-14 13:23:36,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:23:36,177 INFO L225 Difference]: With dead ends: 3187 [2022-12-14 13:23:36,178 INFO L226 Difference]: Without dead ends: 3073 [2022-12-14 13:23:36,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-12-14 13:23:36,178 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 149 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 13:23:36,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 8 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 13:23:36,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3073 states. [2022-12-14 13:23:36,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3073 to 2017. [2022-12-14 13:23:36,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2014 states have (on average 3.83416087388282) internal successors, (7722), 2016 states have internal predecessors, (7722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:36,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 7722 transitions. [2022-12-14 13:23:36,216 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 7722 transitions. Word has length 31 [2022-12-14 13:23:36,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:23:36,216 INFO L495 AbstractCegarLoop]: Abstraction has 2017 states and 7722 transitions. [2022-12-14 13:23:36,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:36,217 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 7722 transitions. [2022-12-14 13:23:36,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 13:23:36,220 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:23:36,220 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, 1, 1, 1, 1] [2022-12-14 13:23:36,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-12-14 13:23:36,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:23:36,421 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:23:36,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:23:36,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1673333493, now seen corresponding path program 3 times [2022-12-14 13:23:36,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:23:36,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134949919] [2022-12-14 13:23:36,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:23:36,421 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:23:36,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:23:36,422 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:23:36,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-12-14 13:23:36,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 13:23:36,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:23:36,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:23:36,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:23:36,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:23:36,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:23:36,963 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:23:36,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134949919] [2022-12-14 13:23:36,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1134949919] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:23:36,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:23:36,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 13:23:36,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261851529] [2022-12-14 13:23:36,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:23:36,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:23:36,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:23:36,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:23:36,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:23:36,965 INFO L87 Difference]: Start difference. First operand 2017 states and 7722 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:38,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:23:38,184 INFO L93 Difference]: Finished difference Result 2433 states and 8819 transitions. [2022-12-14 13:23:38,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 13:23:38,185 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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 31 [2022-12-14 13:23:38,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:23:38,199 INFO L225 Difference]: With dead ends: 2433 [2022-12-14 13:23:38,199 INFO L226 Difference]: Without dead ends: 2347 [2022-12-14 13:23:38,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-12-14 13:23:38,199 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 109 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:23:38,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 12 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 13:23:38,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2022-12-14 13:23:38,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 2007. [2022-12-14 13:23:38,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2007 states, 2004 states have (on average 3.811377245508982) internal successors, (7638), 2006 states have internal predecessors, (7638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:38,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2007 states to 2007 states and 7638 transitions. [2022-12-14 13:23:38,231 INFO L78 Accepts]: Start accepts. Automaton has 2007 states and 7638 transitions. Word has length 31 [2022-12-14 13:23:38,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:23:38,231 INFO L495 AbstractCegarLoop]: Abstraction has 2007 states and 7638 transitions. [2022-12-14 13:23:38,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:38,232 INFO L276 IsEmpty]: Start isEmpty. Operand 2007 states and 7638 transitions. [2022-12-14 13:23:38,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 13:23:38,234 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:23:38,234 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, 1, 1, 1, 1] [2022-12-14 13:23:38,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-12-14 13:23:38,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:23:38,436 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:23:38,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:23:38,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1029892905, now seen corresponding path program 4 times [2022-12-14 13:23:38,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:23:38,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1679214686] [2022-12-14 13:23:38,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:23:38,438 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:23:38,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:23:38,441 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:23:38,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-12-14 13:23:38,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:23:38,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:23:38,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:23:38,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:23:38,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:23:38,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:23:39,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:23:39,017 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:23:39,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1679214686] [2022-12-14 13:23:39,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1679214686] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 13:23:39,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:23:39,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2022-12-14 13:23:39,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307140720] [2022-12-14 13:23:39,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:23:39,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:23:39,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:23:39,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:23:39,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-12-14 13:23:39,018 INFO L87 Difference]: Start difference. First operand 2007 states and 7638 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:39,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:23:39,966 INFO L93 Difference]: Finished difference Result 2743 states and 10135 transitions. [2022-12-14 13:23:39,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 13:23:39,968 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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 31 [2022-12-14 13:23:39,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:23:39,973 INFO L225 Difference]: With dead ends: 2743 [2022-12-14 13:23:39,974 INFO L226 Difference]: Without dead ends: 2511 [2022-12-14 13:23:39,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-12-14 13:23:39,974 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 146 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 13:23:39,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 2 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 13:23:39,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2022-12-14 13:23:40,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 1889. [2022-12-14 13:23:40,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1886 states have (on average 3.795334040296925) internal successors, (7158), 1888 states have internal predecessors, (7158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:40,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 7158 transitions. [2022-12-14 13:23:40,007 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 7158 transitions. Word has length 31 [2022-12-14 13:23:40,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:23:40,007 INFO L495 AbstractCegarLoop]: Abstraction has 1889 states and 7158 transitions. [2022-12-14 13:23:40,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:40,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 7158 transitions. [2022-12-14 13:23:40,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 13:23:40,010 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:23:40,010 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, 1, 1, 1, 1] [2022-12-14 13:23:40,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-12-14 13:23:40,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:23:40,211 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:23:40,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:23:40,211 INFO L85 PathProgramCache]: Analyzing trace with hash -674307487, now seen corresponding path program 5 times [2022-12-14 13:23:40,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:23:40,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [835161615] [2022-12-14 13:23:40,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 13:23:40,212 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:23:40,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:23:40,214 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:23:40,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-12-14 13:23:40,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:23:40,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:23:40,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 13:23:40,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:23:40,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:23:40,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:23:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:23:42,070 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:23:42,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [835161615] [2022-12-14 13:23:42,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [835161615] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:23:42,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [952805808] [2022-12-14 13:23:42,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 13:23:42,070 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:23:42,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:23:42,071 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:23:42,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-12-14 13:23:42,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:23:42,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:23:42,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 13:23:42,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:23:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:23:42,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:23:43,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:23:43,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [952805808] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:23:43,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954662377] [2022-12-14 13:23:43,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 13:23:43,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:23:43,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:23:43,387 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:23:43,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-12-14 13:23:43,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:23:43,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:23:43,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 13:23:43,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:23:44,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:23:44,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:23:44,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:23:44,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954662377] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:23:44,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:23:44,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7, 7, 8, 9] total 38 [2022-12-14 13:23:44,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203770402] [2022-12-14 13:23:44,975 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:23:44,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 13:23:44,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:23:44,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 13:23:44,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1244, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 13:23:44,977 INFO L87 Difference]: Start difference. First operand 1889 states and 7158 transitions. Second operand has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 38 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:58,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:23:58,722 INFO L93 Difference]: Finished difference Result 4793 states and 17195 transitions. [2022-12-14 13:23:58,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 13:23:58,723 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 38 states have internal predecessors, (115), 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 31 [2022-12-14 13:23:58,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:23:58,733 INFO L225 Difference]: With dead ends: 4793 [2022-12-14 13:23:58,733 INFO L226 Difference]: Without dead ends: 4341 [2022-12-14 13:23:58,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1545 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1109, Invalid=4743, Unknown=0, NotChecked=0, Total=5852 [2022-12-14 13:23:58,734 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1261 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 3262 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1261 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 3361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 3262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:23:58,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1261 Valid, 17 Invalid, 3361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 3262 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-12-14 13:23:58,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4341 states. [2022-12-14 13:23:58,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4341 to 1835. [2022-12-14 13:23:58,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1835 states, 1832 states have (on average 3.710698689956332) internal successors, (6798), 1834 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:58,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 6798 transitions. [2022-12-14 13:23:58,777 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 6798 transitions. Word has length 31 [2022-12-14 13:23:58,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:23:58,777 INFO L495 AbstractCegarLoop]: Abstraction has 1835 states and 6798 transitions. [2022-12-14 13:23:58,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 38 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:58,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 6798 transitions. [2022-12-14 13:23:58,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 13:23:58,780 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:23:58,780 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, 1, 1, 1, 1] [2022-12-14 13:23:58,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-12-14 13:23:59,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-12-14 13:23:59,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2022-12-14 13:23:59,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 13:23:59,383 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:23:59,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:23:59,384 INFO L85 PathProgramCache]: Analyzing trace with hash 295593763, now seen corresponding path program 6 times [2022-12-14 13:23:59,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:23:59,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2081836430] [2022-12-14 13:23:59,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 13:23:59,386 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:23:59,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:23:59,388 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:23:59,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-12-14 13:23:59,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-14 13:23:59,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:23:59,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:23:59,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:23:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:23:59,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:23:59,830 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:23:59,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2081836430] [2022-12-14 13:23:59,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2081836430] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:23:59,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:23:59,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 13:23:59,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458104606] [2022-12-14 13:23:59,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:23:59,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:23:59,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:23:59,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:23:59,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:23:59,832 INFO L87 Difference]: Start difference. First operand 1835 states and 6798 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:00,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:24:00,821 INFO L93 Difference]: Finished difference Result 1965 states and 7092 transitions. [2022-12-14 13:24:00,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 13:24:00,822 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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 31 [2022-12-14 13:24:00,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:24:00,826 INFO L225 Difference]: With dead ends: 1965 [2022-12-14 13:24:00,826 INFO L226 Difference]: Without dead ends: 1866 [2022-12-14 13:24:00,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-14 13:24:00,827 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 98 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 13:24:00,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 12 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 13:24:00,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2022-12-14 13:24:00,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1618. [2022-12-14 13:24:00,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1615 states have (on average 3.8291021671826626) internal successors, (6184), 1617 states have internal predecessors, (6184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:00,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 6184 transitions. [2022-12-14 13:24:00,850 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 6184 transitions. Word has length 31 [2022-12-14 13:24:00,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:24:00,850 INFO L495 AbstractCegarLoop]: Abstraction has 1618 states and 6184 transitions. [2022-12-14 13:24:00,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:00,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 6184 transitions. [2022-12-14 13:24:00,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 13:24:00,852 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:24:00,852 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, 1, 1, 1, 1] [2022-12-14 13:24:00,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-12-14 13:24:01,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:24:01,054 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:24:01,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:24:01,055 INFO L85 PathProgramCache]: Analyzing trace with hash 888559915, now seen corresponding path program 1 times [2022-12-14 13:24:01,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:24:01,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [798999426] [2022-12-14 13:24:01,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:24:01,056 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:24:01,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:24:01,059 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:24:01,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-12-14 13:24:01,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:24:01,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:24:01,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:24:01,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:24:01,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:24:01,494 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:24:01,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [798999426] [2022-12-14 13:24:01,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [798999426] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:24:01,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:24:01,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 13:24:01,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348766875] [2022-12-14 13:24:01,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:24:01,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:24:01,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:24:01,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:24:01,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:24:01,495 INFO L87 Difference]: Start difference. First operand 1618 states and 6184 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:02,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:24:02,555 INFO L93 Difference]: Finished difference Result 2258 states and 8695 transitions. [2022-12-14 13:24:02,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 13:24:02,556 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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 31 [2022-12-14 13:24:02,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:24:02,566 INFO L225 Difference]: With dead ends: 2258 [2022-12-14 13:24:02,567 INFO L226 Difference]: Without dead ends: 2208 [2022-12-14 13:24:02,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:24:02,567 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 84 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 13:24:02,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 17 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 13:24:02,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2022-12-14 13:24:02,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 1832. [2022-12-14 13:24:02,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1829 states have (on average 3.951886276653909) internal successors, (7228), 1831 states have internal predecessors, (7228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:02,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 7228 transitions. [2022-12-14 13:24:02,594 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 7228 transitions. Word has length 31 [2022-12-14 13:24:02,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:24:02,594 INFO L495 AbstractCegarLoop]: Abstraction has 1832 states and 7228 transitions. [2022-12-14 13:24:02,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:02,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 7228 transitions. [2022-12-14 13:24:02,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 13:24:02,597 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:24:02,597 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, 1, 1, 1, 1] [2022-12-14 13:24:02,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Ended with exit code 0 [2022-12-14 13:24:02,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:24:02,799 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:24:02,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:24:02,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1390668961, now seen corresponding path program 2 times [2022-12-14 13:24:02,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:24:02,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1574669085] [2022-12-14 13:24:02,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:24:02,802 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:24:02,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:24:02,805 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:24:02,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-12-14 13:24:03,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:24:03,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:24:03,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:24:03,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:24:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:24:03,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:24:03,416 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:24:03,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1574669085] [2022-12-14 13:24:03,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1574669085] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:24:03,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:24:03,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 13:24:03,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154173642] [2022-12-14 13:24:03,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:24:03,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:24:03,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:24:03,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:24:03,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:24:03,418 INFO L87 Difference]: Start difference. First operand 1832 states and 7228 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:04,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:24:04,336 INFO L93 Difference]: Finished difference Result 2004 states and 7652 transitions. [2022-12-14 13:24:04,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:24:04,337 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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 31 [2022-12-14 13:24:04,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:24:04,340 INFO L225 Difference]: With dead ends: 2004 [2022-12-14 13:24:04,340 INFO L226 Difference]: Without dead ends: 1850 [2022-12-14 13:24:04,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-14 13:24:04,341 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 66 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:24:04,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 8 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 13:24:04,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2022-12-14 13:24:04,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1640. [2022-12-14 13:24:04,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1637 states have (on average 3.8601099572388518) internal successors, (6319), 1639 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:04,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 6319 transitions. [2022-12-14 13:24:04,366 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 6319 transitions. Word has length 31 [2022-12-14 13:24:04,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:24:04,366 INFO L495 AbstractCegarLoop]: Abstraction has 1640 states and 6319 transitions. [2022-12-14 13:24:04,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:04,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 6319 transitions. [2022-12-14 13:24:04,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 13:24:04,369 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:24:04,369 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, 1, 1, 1, 1] [2022-12-14 13:24:04,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-12-14 13:24:04,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:24:04,570 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:24:04,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:24:04,571 INFO L85 PathProgramCache]: Analyzing trace with hash -674717937, now seen corresponding path program 3 times [2022-12-14 13:24:04,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:24:04,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [498869876] [2022-12-14 13:24:04,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:24:04,574 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:24:04,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:24:04,577 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:24:04,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-12-14 13:24:04,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 13:24:04,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:24:04,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 13:24:04,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:24:05,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:24:05,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:24:05,130 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:24:05,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [498869876] [2022-12-14 13:24:05,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [498869876] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:24:05,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:24:05,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 13:24:05,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095053200] [2022-12-14 13:24:05,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:24:05,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:24:05,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:24:05,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:24:05,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:24:05,132 INFO L87 Difference]: Start difference. First operand 1640 states and 6319 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:05,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:24:05,895 INFO L93 Difference]: Finished difference Result 2716 states and 10345 transitions. [2022-12-14 13:24:05,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:24:05,896 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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 31 [2022-12-14 13:24:05,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:24:05,902 INFO L225 Difference]: With dead ends: 2716 [2022-12-14 13:24:05,902 INFO L226 Difference]: Without dead ends: 2416 [2022-12-14 13:24:05,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:24:05,902 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 80 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:24:05,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 2 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 13:24:05,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2022-12-14 13:24:05,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 1680. [2022-12-14 13:24:05,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1677 states have (on average 3.8395945140131187) internal successors, (6439), 1679 states have internal predecessors, (6439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:05,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 6439 transitions. [2022-12-14 13:24:05,931 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 6439 transitions. Word has length 31 [2022-12-14 13:24:05,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:24:05,931 INFO L495 AbstractCegarLoop]: Abstraction has 1680 states and 6439 transitions. [2022-12-14 13:24:05,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:05,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 6439 transitions. [2022-12-14 13:24:05,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 13:24:05,934 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:24:05,934 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, 1, 1, 1, 1] [2022-12-14 13:24:05,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-12-14 13:24:06,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:24:06,135 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:24:06,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:24:06,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1977372547, now seen corresponding path program 4 times [2022-12-14 13:24:06,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:24:06,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [814826554] [2022-12-14 13:24:06,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:24:06,138 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:24:06,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:24:06,141 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:24:06,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-12-14 13:24:06,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:24:06,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:24:06,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:24:06,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:24:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:24:06,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:24:06,590 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:24:06,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [814826554] [2022-12-14 13:24:06,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [814826554] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:24:06,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:24:06,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 13:24:06,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968269639] [2022-12-14 13:24:06,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:24:06,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:24:06,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:24:06,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:24:06,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:24:06,591 INFO L87 Difference]: Start difference. First operand 1680 states and 6439 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:07,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:24:07,854 INFO L93 Difference]: Finished difference Result 2404 states and 9079 transitions. [2022-12-14 13:24:07,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 13:24:07,855 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 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 31 [2022-12-14 13:24:07,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:24:07,860 INFO L225 Difference]: With dead ends: 2404 [2022-12-14 13:24:07,860 INFO L226 Difference]: Without dead ends: 2244 [2022-12-14 13:24:07,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-12-14 13:24:07,860 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 105 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:24:07,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 7 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 13:24:07,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2022-12-14 13:24:07,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 1548. [2022-12-14 13:24:07,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1548 states, 1545 states have (on average 3.8271844660194176) internal successors, (5913), 1547 states have internal predecessors, (5913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:07,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 5913 transitions. [2022-12-14 13:24:07,887 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 5913 transitions. Word has length 31 [2022-12-14 13:24:07,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:24:07,887 INFO L495 AbstractCegarLoop]: Abstraction has 1548 states and 5913 transitions. [2022-12-14 13:24:07,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:07,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 5913 transitions. [2022-12-14 13:24:07,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 13:24:07,890 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:24:07,890 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:24:07,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Ended with exit code 0 [2022-12-14 13:24:08,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:24:08,092 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:24:08,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:24:08,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1015489818, now seen corresponding path program 5 times [2022-12-14 13:24:08,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:24:08,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534596203] [2022-12-14 13:24:08,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 13:24:08,094 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:24:08,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:24:08,097 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:24:08,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-12-14 13:24:08,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:24:08,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:24:08,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 13:24:08,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:24:08,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:24:08,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:24:09,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:24:09,714 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:24:09,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534596203] [2022-12-14 13:24:09,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534596203] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:24:09,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1224264745] [2022-12-14 13:24:09,715 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 13:24:09,715 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:24:09,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:24:09,715 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:24:09,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-12-14 13:24:10,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:24:10,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:24:10,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 13:24:10,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:24:10,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:24:10,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:24:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:24:10,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1224264745] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:24:10,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970300756] [2022-12-14 13:24:10,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 13:24:10,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:24:10,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:24:10,555 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:24:10,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-12-14 13:24:10,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:24:10,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:24:10,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 13:24:10,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:24:11,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:24:11,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:24:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:24:11,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970300756] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:24:11,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:24:11,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 6, 6, 6, 8] total 33 [2022-12-14 13:24:11,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024282287] [2022-12-14 13:24:11,673 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:24:11,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 13:24:11,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:24:11,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 13:24:11,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 13:24:11,674 INFO L87 Difference]: Start difference. First operand 1548 states and 5913 transitions. Second operand has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 33 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:47,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:24:47,867 INFO L93 Difference]: Finished difference Result 12364 states and 45808 transitions. [2022-12-14 13:24:47,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2022-12-14 13:24:47,869 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 33 states have internal predecessors, (117), 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 32 [2022-12-14 13:24:47,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:24:47,897 INFO L225 Difference]: With dead ends: 12364 [2022-12-14 13:24:47,897 INFO L226 Difference]: Without dead ends: 11254 [2022-12-14 13:24:47,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18926 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=5698, Invalid=38192, Unknown=0, NotChecked=0, Total=43890 [2022-12-14 13:24:47,903 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3291 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4415 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3291 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 4415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:24:47,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3291 Valid, 0 Invalid, 4645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 4415 Invalid, 0 Unknown, 0 Unchecked, 13.1s Time] [2022-12-14 13:24:47,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11254 states. [2022-12-14 13:24:48,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11254 to 3368. [2022-12-14 13:24:48,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3368 states, 3365 states have (on average 4.096285289747399) internal successors, (13784), 3367 states have internal predecessors, (13784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:48,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3368 states to 3368 states and 13784 transitions. [2022-12-14 13:24:48,049 INFO L78 Accepts]: Start accepts. Automaton has 3368 states and 13784 transitions. Word has length 32 [2022-12-14 13:24:48,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:24:48,049 INFO L495 AbstractCegarLoop]: Abstraction has 3368 states and 13784 transitions. [2022-12-14 13:24:48,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 33 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:48,049 INFO L276 IsEmpty]: Start isEmpty. Operand 3368 states and 13784 transitions. [2022-12-14 13:24:48,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 13:24:48,056 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:24:48,056 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, 1, 1, 1, 1, 1, 1] [2022-12-14 13:24:48,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Ended with exit code 0 [2022-12-14 13:24:48,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-12-14 13:24:48,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2022-12-14 13:24:48,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 13:24:48,658 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:24:48,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:24:48,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1429291149, now seen corresponding path program 1 times [2022-12-14 13:24:48,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:24:48,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1444937120] [2022-12-14 13:24:48,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:24:48,660 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:24:48,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:24:48,661 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:24:48,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-12-14 13:24:48,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:24:48,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 13:24:48,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:24:49,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:24:49,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:24:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:24:49,172 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:24:49,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1444937120] [2022-12-14 13:24:49,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1444937120] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 13:24:49,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:24:49,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-12-14 13:24:49,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892568900] [2022-12-14 13:24:49,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:24:49,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:24:49,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:24:49,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:24:49,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:24:49,173 INFO L87 Difference]: Start difference. First operand 3368 states and 13784 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:49,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:24:49,760 INFO L93 Difference]: Finished difference Result 4696 states and 18913 transitions. [2022-12-14 13:24:49,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:24:49,762 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 33 [2022-12-14 13:24:49,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:24:49,773 INFO L225 Difference]: With dead ends: 4696 [2022-12-14 13:24:49,773 INFO L226 Difference]: Without dead ends: 4696 [2022-12-14 13:24:49,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-14 13:24:49,773 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 50 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:24:49,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 8 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:24:49,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4696 states. [2022-12-14 13:24:49,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4696 to 3624. [2022-12-14 13:24:49,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3624 states, 3621 states have (on average 4.157691245512289) internal successors, (15055), 3623 states have internal predecessors, (15055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:49,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3624 states to 3624 states and 15055 transitions. [2022-12-14 13:24:49,847 INFO L78 Accepts]: Start accepts. Automaton has 3624 states and 15055 transitions. Word has length 33 [2022-12-14 13:24:49,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:24:49,847 INFO L495 AbstractCegarLoop]: Abstraction has 3624 states and 15055 transitions. [2022-12-14 13:24:49,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:49,847 INFO L276 IsEmpty]: Start isEmpty. Operand 3624 states and 15055 transitions. [2022-12-14 13:24:49,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 13:24:49,854 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:24:49,854 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, 1, 1, 1, 1, 1, 1] [2022-12-14 13:24:49,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Ended with exit code 0 [2022-12-14 13:24:50,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:24:50,055 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:24:50,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:24:50,056 INFO L85 PathProgramCache]: Analyzing trace with hash 184992607, now seen corresponding path program 2 times [2022-12-14 13:24:50,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:24:50,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465173266] [2022-12-14 13:24:50,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:24:50,058 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:24:50,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:24:50,061 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:24:50,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-12-14 13:24:50,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:24:50,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:24:50,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 13:24:50,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:24:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:24:50,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:24:50,630 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:24:50,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465173266] [2022-12-14 13:24:50,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [465173266] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:24:50,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:24:50,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 13:24:50,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010890115] [2022-12-14 13:24:50,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:24:50,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:24:50,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:24:50,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:24:50,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:24:50,631 INFO L87 Difference]: Start difference. First operand 3624 states and 15055 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:51,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:24:51,559 INFO L93 Difference]: Finished difference Result 4636 states and 18825 transitions. [2022-12-14 13:24:51,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:24:51,561 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 33 [2022-12-14 13:24:51,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:24:51,573 INFO L225 Difference]: With dead ends: 4636 [2022-12-14 13:24:51,573 INFO L226 Difference]: Without dead ends: 4560 [2022-12-14 13:24:51,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:24:51,573 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 63 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:24:51,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 12 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 13:24:51,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4560 states. [2022-12-14 13:24:51,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4560 to 3562. [2022-12-14 13:24:51,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3562 states, 3559 states have (on average 4.12784490025288) internal successors, (14691), 3561 states have internal predecessors, (14691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:51,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3562 states to 3562 states and 14691 transitions. [2022-12-14 13:24:51,646 INFO L78 Accepts]: Start accepts. Automaton has 3562 states and 14691 transitions. Word has length 33 [2022-12-14 13:24:51,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:24:51,646 INFO L495 AbstractCegarLoop]: Abstraction has 3562 states and 14691 transitions. [2022-12-14 13:24:51,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:51,646 INFO L276 IsEmpty]: Start isEmpty. Operand 3562 states and 14691 transitions. [2022-12-14 13:24:51,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 13:24:51,653 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:24:51,653 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, 1, 1, 1, 1, 1, 1] [2022-12-14 13:24:51,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-12-14 13:24:51,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:24:51,854 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:24:51,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:24:51,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1990065096, now seen corresponding path program 1 times [2022-12-14 13:24:51,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:24:51,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1749390752] [2022-12-14 13:24:51,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:24:51,857 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:24:51,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:24:51,860 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:24:51,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-12-14 13:24:52,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:24:52,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 13:24:52,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:24:52,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:24:52,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:24:53,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:24:53,053 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:24:53,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1749390752] [2022-12-14 13:24:53,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1749390752] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:24:53,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [870211193] [2022-12-14 13:24:53,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:24:53,053 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:24:53,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:24:53,054 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:24:53,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2022-12-14 13:24:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:24:53,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 13:24:53,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:24:53,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:24:53,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:24:54,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:24:54,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [870211193] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:24:54,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318919016] [2022-12-14 13:24:54,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:24:54,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:24:54,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:24:54,092 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:24:54,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-12-14 13:24:54,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:24:54,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 13:24:54,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:24:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:24:54,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:24:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:24:55,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318919016] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:24:55,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:24:55,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7, 7, 9, 8] total 22 [2022-12-14 13:24:55,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752709383] [2022-12-14 13:24:55,284 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:24:55,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 13:24:55,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:24:55,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 13:24:55,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2022-12-14 13:24:55,284 INFO L87 Difference]: Start difference. First operand 3562 states and 14691 transitions. Second operand has 23 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 22 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:58,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:24:58,341 INFO L93 Difference]: Finished difference Result 9347 states and 38480 transitions. [2022-12-14 13:24:58,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 13:24:58,342 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 22 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-12-14 13:24:58,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:24:58,367 INFO L225 Difference]: With dead ends: 9347 [2022-12-14 13:24:58,367 INFO L226 Difference]: Without dead ends: 9347 [2022-12-14 13:24:58,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2022-12-14 13:24:58,368 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 253 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1071 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:24:58,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 87 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1071 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-12-14 13:24:58,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9347 states. [2022-12-14 13:24:58,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9347 to 3884. [2022-12-14 13:24:58,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3884 states, 3881 states have (on average 4.1249677918062355) internal successors, (16009), 3883 states have internal predecessors, (16009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:58,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3884 states to 3884 states and 16009 transitions. [2022-12-14 13:24:58,517 INFO L78 Accepts]: Start accepts. Automaton has 3884 states and 16009 transitions. Word has length 33 [2022-12-14 13:24:58,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:24:58,517 INFO L495 AbstractCegarLoop]: Abstraction has 3884 states and 16009 transitions. [2022-12-14 13:24:58,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 22 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:58,517 INFO L276 IsEmpty]: Start isEmpty. Operand 3884 states and 16009 transitions. [2022-12-14 13:24:58,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 13:24:58,523 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:24:58,523 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, 1, 1, 1, 1, 1, 1] [2022-12-14 13:24:58,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (63)] Ended with exit code 0 [2022-12-14 13:24:58,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-12-14 13:24:58,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-12-14 13:24:59,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:24:59,125 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:24:59,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:24:59,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1037520083, now seen corresponding path program 3 times [2022-12-14 13:24:59,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:24:59,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147989833] [2022-12-14 13:24:59,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:24:59,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:24:59,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:24:59,130 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:24:59,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-12-14 13:24:59,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 13:24:59,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:24:59,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 13:24:59,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:24:59,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:24:59,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:24:59,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:24:59,621 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:24:59,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147989833] [2022-12-14 13:24:59,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147989833] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 13:24:59,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:24:59,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-12-14 13:24:59,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949596314] [2022-12-14 13:24:59,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:24:59,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:24:59,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:24:59,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:24:59,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:24:59,622 INFO L87 Difference]: Start difference. First operand 3884 states and 16009 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:25:00,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:25:00,272 INFO L93 Difference]: Finished difference Result 5234 states and 20298 transitions. [2022-12-14 13:25:00,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:25:00,273 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 33 [2022-12-14 13:25:00,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:25:00,286 INFO L225 Difference]: With dead ends: 5234 [2022-12-14 13:25:00,286 INFO L226 Difference]: Without dead ends: 5234 [2022-12-14 13:25:00,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-14 13:25:00,287 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 53 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:25:00,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 19 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 13:25:00,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5234 states. [2022-12-14 13:25:00,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5234 to 3654. [2022-12-14 13:25:00,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3654 states, 3651 states have (on average 4.040536839222131) internal successors, (14752), 3653 states have internal predecessors, (14752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:25:00,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3654 states to 3654 states and 14752 transitions. [2022-12-14 13:25:00,361 INFO L78 Accepts]: Start accepts. Automaton has 3654 states and 14752 transitions. Word has length 33 [2022-12-14 13:25:00,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:25:00,362 INFO L495 AbstractCegarLoop]: Abstraction has 3654 states and 14752 transitions. [2022-12-14 13:25:00,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:25:00,362 INFO L276 IsEmpty]: Start isEmpty. Operand 3654 states and 14752 transitions. [2022-12-14 13:25:00,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 13:25:00,370 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:25:00,370 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, 1, 1, 1, 1, 1, 1] [2022-12-14 13:25:00,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Ended with exit code 0 [2022-12-14 13:25:00,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:25:00,572 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:25:00,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:25:00,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1643163457, now seen corresponding path program 4 times [2022-12-14 13:25:00,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:25:00,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134539655] [2022-12-14 13:25:00,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:25:00,575 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:25:00,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:25:00,577 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:25:00,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-12-14 13:25:00,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:25:00,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:25:00,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 13:25:00,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:25:00,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:25:00,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:25:00,950 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:25:00,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134539655] [2022-12-14 13:25:00,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134539655] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:25:00,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:25:00,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 13:25:00,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796277086] [2022-12-14 13:25:00,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:25:00,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:25:00,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:25:00,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:25:00,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:25:00,951 INFO L87 Difference]: Start difference. First operand 3654 states and 14752 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:25:01,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:25:01,694 INFO L93 Difference]: Finished difference Result 5200 states and 21147 transitions. [2022-12-14 13:25:01,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:25:01,695 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 33 [2022-12-14 13:25:01,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:25:01,709 INFO L225 Difference]: With dead ends: 5200 [2022-12-14 13:25:01,709 INFO L226 Difference]: Without dead ends: 5112 [2022-12-14 13:25:01,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:25:01,709 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 55 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:25:01,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 19 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 13:25:01,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5112 states. [2022-12-14 13:25:01,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5112 to 3554. [2022-12-14 13:25:01,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3554 states, 3551 states have (on average 4.030413967896367) internal successors, (14312), 3553 states have internal predecessors, (14312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:25:01,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3554 states to 3554 states and 14312 transitions. [2022-12-14 13:25:01,785 INFO L78 Accepts]: Start accepts. Automaton has 3554 states and 14312 transitions. Word has length 33 [2022-12-14 13:25:01,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:25:01,785 INFO L495 AbstractCegarLoop]: Abstraction has 3554 states and 14312 transitions. [2022-12-14 13:25:01,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:25:01,785 INFO L276 IsEmpty]: Start isEmpty. Operand 3554 states and 14312 transitions. [2022-12-14 13:25:01,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 13:25:01,792 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:25:01,792 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, 1, 1, 1, 1, 1, 1] [2022-12-14 13:25:01,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-12-14 13:25:01,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:25:01,993 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:25:01,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:25:01,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1232704968, now seen corresponding path program 2 times [2022-12-14 13:25:01,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:25:01,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1667889456] [2022-12-14 13:25:01,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:25:01,996 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:25:01,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:25:01,999 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:25:02,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-12-14 13:25:02,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:25:02,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:25:02,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 13:25:02,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:25:02,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:25:02,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:25:02,396 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:25:02,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1667889456] [2022-12-14 13:25:02,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1667889456] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:25:02,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:25:02,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 13:25:02,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53209359] [2022-12-14 13:25:02,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:25:02,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:25:02,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:25:02,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:25:02,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:25:02,398 INFO L87 Difference]: Start difference. First operand 3554 states and 14312 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:25:03,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:25:03,241 INFO L93 Difference]: Finished difference Result 7790 states and 31635 transitions. [2022-12-14 13:25:03,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:25:03,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 33 [2022-12-14 13:25:03,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:25:03,262 INFO L225 Difference]: With dead ends: 7790 [2022-12-14 13:25:03,262 INFO L226 Difference]: Without dead ends: 7790 [2022-12-14 13:25:03,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:25:03,263 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 76 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:25:03,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 19 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 13:25:03,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7790 states. [2022-12-14 13:25:03,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7790 to 3508. [2022-12-14 13:25:03,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3508 states, 3505 states have (on average 4.031669044222539) internal successors, (14131), 3507 states have internal predecessors, (14131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:25:03,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3508 states to 3508 states and 14131 transitions. [2022-12-14 13:25:03,352 INFO L78 Accepts]: Start accepts. Automaton has 3508 states and 14131 transitions. Word has length 33 [2022-12-14 13:25:03,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:25:03,352 INFO L495 AbstractCegarLoop]: Abstraction has 3508 states and 14131 transitions. [2022-12-14 13:25:03,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:25:03,353 INFO L276 IsEmpty]: Start isEmpty. Operand 3508 states and 14131 transitions. [2022-12-14 13:25:03,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 13:25:03,359 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:25:03,359 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, 1, 1, 1, 1, 1, 1] [2022-12-14 13:25:03,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-12-14 13:25:03,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:25:03,560 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:25:03,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:25:03,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1792533753, now seen corresponding path program 5 times [2022-12-14 13:25:03,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:25:03,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1806008687] [2022-12-14 13:25:03,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 13:25:03,563 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:25:03,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:25:03,566 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:25:03,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-12-14 13:25:03,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:25:03,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:25:03,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 13:25:03,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:25:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:25:03,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:25:03,944 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:25:03,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1806008687] [2022-12-14 13:25:03,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1806008687] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:25:03,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:25:03,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 13:25:03,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142901838] [2022-12-14 13:25:03,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:25:03,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:25:03,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:25:03,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:25:03,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:25:03,945 INFO L87 Difference]: Start difference. First operand 3508 states and 14131 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:25:04,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:25:04,692 INFO L93 Difference]: Finished difference Result 4162 states and 16616 transitions. [2022-12-14 13:25:04,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 13:25:04,694 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 33 [2022-12-14 13:25:04,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:25:04,703 INFO L225 Difference]: With dead ends: 4162 [2022-12-14 13:25:04,703 INFO L226 Difference]: Without dead ends: 3986 [2022-12-14 13:25:04,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:25:04,704 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 56 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:25:04,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 13 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 13:25:04,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2022-12-14 13:25:04,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 3234. [2022-12-14 13:25:04,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3234 states, 3231 states have (on average 4.049520272361498) internal successors, (13084), 3233 states have internal predecessors, (13084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:25:04,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3234 states to 3234 states and 13084 transitions. [2022-12-14 13:25:04,765 INFO L78 Accepts]: Start accepts. Automaton has 3234 states and 13084 transitions. Word has length 33 [2022-12-14 13:25:04,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:25:04,765 INFO L495 AbstractCegarLoop]: Abstraction has 3234 states and 13084 transitions. [2022-12-14 13:25:04,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:25:04,765 INFO L276 IsEmpty]: Start isEmpty. Operand 3234 states and 13084 transitions. [2022-12-14 13:25:04,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 13:25:04,771 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:25:04,771 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, 1, 1, 1, 1, 1, 1] [2022-12-14 13:25:04,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-12-14 13:25:04,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:25:04,972 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:25:04,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:25:04,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1336468770, now seen corresponding path program 3 times [2022-12-14 13:25:04,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:25:04,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612183092] [2022-12-14 13:25:04,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:25:04,975 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:25:04,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:25:04,977 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:25:04,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-12-14 13:25:05,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 13:25:05,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:25:05,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 13:25:05,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:25:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:25:05,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:25:05,357 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:25:05,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612183092] [2022-12-14 13:25:05,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612183092] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:25:05,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:25:05,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 13:25:05,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20097015] [2022-12-14 13:25:05,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:25:05,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:25:05,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:25:05,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:25:05,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:25:05,358 INFO L87 Difference]: Start difference. First operand 3234 states and 13084 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:25:06,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:25:06,202 INFO L93 Difference]: Finished difference Result 5652 states and 22835 transitions. [2022-12-14 13:25:06,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:25:06,204 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 33 [2022-12-14 13:25:06,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:25:06,218 INFO L225 Difference]: With dead ends: 5652 [2022-12-14 13:25:06,218 INFO L226 Difference]: Without dead ends: 5652 [2022-12-14 13:25:06,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:25:06,219 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 74 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:25:06,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 12 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 13:25:06,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5652 states. [2022-12-14 13:25:06,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5652 to 3100. [2022-12-14 13:25:06,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3100 states, 3097 states have (on average 4.041007426541815) internal successors, (12515), 3099 states have internal predecessors, (12515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:25:06,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3100 states to 3100 states and 12515 transitions. [2022-12-14 13:25:06,290 INFO L78 Accepts]: Start accepts. Automaton has 3100 states and 12515 transitions. Word has length 33 [2022-12-14 13:25:06,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:25:06,290 INFO L495 AbstractCegarLoop]: Abstraction has 3100 states and 12515 transitions. [2022-12-14 13:25:06,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:25:06,290 INFO L276 IsEmpty]: Start isEmpty. Operand 3100 states and 12515 transitions. [2022-12-14 13:25:06,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 13:25:06,305 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:25:06,306 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:25:06,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-12-14 13:25:06,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:25:06,507 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 13:25:06,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:25:06,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1572601792, now seen corresponding path program 1 times [2022-12-14 13:25:06,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:25:06,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520906533] [2022-12-14 13:25:06,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:25:06,510 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:25:06,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:25:06,513 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:25:06,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075e18f1-4b86-493f-ac57-22b27e40572b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-12-14 13:25:07,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:25:07,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 13:25:07,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:25:08,614 INFO L321 Elim1Store]: treesize reduction 60, result has 82.0 percent of original size [2022-12-14 13:25:08,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 219 treesize of output 316 [2022-12-14 13:25:11,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:25:11,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:25:20,286 WARN L233 SmtUtils]: Spent 6.77s on a formula simplification. DAG size of input: 392 DAG size of output: 287 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 13:25:20,288 INFO L321 Elim1Store]: treesize reduction 393, result has 76.8 percent of original size [2022-12-14 13:25:20,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 180 treesize of output 1343