./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-two-queue.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_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/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_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/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_f64fe674-e5f9-4df1-b7e3-1134bb063941/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 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 --- 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 11:39:17,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:39:17,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:39:17,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:39:17,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:39:17,318 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:39:17,319 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:39:17,321 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:39:17,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:39:17,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:39:17,324 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:39:17,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:39:17,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:39:17,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:39:17,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:39:17,328 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:39:17,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:39:17,330 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:39:17,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:39:17,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:39:17,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:39:17,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:39:17,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:39:17,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:39:17,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:39:17,340 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:39:17,341 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:39:17,342 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:39:17,342 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:39:17,343 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:39:17,343 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:39:17,344 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:39:17,344 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:39:17,345 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:39:17,346 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:39:17,346 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:39:17,346 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:39:17,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:39:17,347 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:39:17,347 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:39:17,348 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:39:17,349 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 11:39:17,368 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:39:17,368 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:39:17,369 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:39:17,369 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:39:17,369 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:39:17,369 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:39:17,370 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:39:17,370 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:39:17,370 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:39:17,370 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:39:17,370 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:39:17,370 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:39:17,371 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:39:17,371 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:39:17,371 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:39:17,371 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:39:17,371 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:39:17,371 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:39:17,372 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 11:39:17,372 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 11:39:17,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:39:17,373 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:39:17,373 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 11:39:17,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:39:17,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:39:17,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:39:17,373 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 11:39:17,373 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 11:39:17,374 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 11:39:17,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:39:17,374 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 11:39:17,374 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:39:17,374 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:39:17,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:39:17,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:39:17,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:39:17,375 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:39:17,375 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:39:17,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:39:17,375 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:39:17,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:39:17,376 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:39:17,376 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_f64fe674-e5f9-4df1-b7e3-1134bb063941/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 [2022-12-14 11:39:17,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:39:17,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:39:17,585 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:39:17,586 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:39:17,587 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:39:17,588 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2022-12-14 11:39:20,120 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:39:20,300 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:39:20,301 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2022-12-14 11:39:20,307 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/data/f52c3040b/9bf5a2980e804a4497b7a68451dcc316/FLAG6541a2d00 [2022-12-14 11:39:20,698 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/data/f52c3040b/9bf5a2980e804a4497b7a68451dcc316 [2022-12-14 11:39:20,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:39:20,702 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:39:20,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:39:20,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:39:20,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:39:20,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:39:20" (1/1) ... [2022-12-14 11:39:20,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a96b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:39:20, skipping insertion in model container [2022-12-14 11:39:20,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:39:20" (1/1) ... [2022-12-14 11:39:20,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:39:20,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:39:20,842 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:39:20,844 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:39:20,844 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:39:20,846 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:39:20,849 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:39:20,850 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:39:20,850 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:39:20,852 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:39:20,859 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_f64fe674-e5f9-4df1-b7e3-1134bb063941/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c[2987,3000] [2022-12-14 11:39:20,868 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:39:20,879 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 11:39:20,879 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5a7a8f45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:39:20, skipping insertion in model container [2022-12-14 11:39:20,879 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:39:20,880 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 11:39:20,881 INFO L158 Benchmark]: Toolchain (without parser) took 178.26ms. Allocated memory is still 136.3MB. Free memory was 101.6MB in the beginning and 91.2MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 11:39:20,882 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 136.3MB. Free memory is still 107.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 11:39:20,882 INFO L158 Benchmark]: CACSL2BoogieTranslator took 175.97ms. Allocated memory is still 136.3MB. Free memory was 101.6MB in the beginning and 91.2MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 11:39:20,884 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 136.3MB. Free memory is still 107.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 175.97ms. Allocated memory is still 136.3MB. Free memory was 101.6MB in the beginning and 91.2MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 111]: 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_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/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_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/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_f64fe674-e5f9-4df1-b7e3-1134bb063941/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 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 --- 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 11:39:22,272 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:39:22,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:39:22,286 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:39:22,286 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:39:22,287 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:39:22,288 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:39:22,289 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:39:22,290 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:39:22,291 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:39:22,291 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:39:22,292 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:39:22,292 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:39:22,293 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:39:22,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:39:22,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:39:22,294 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:39:22,295 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:39:22,296 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:39:22,297 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:39:22,298 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:39:22,299 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:39:22,300 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:39:22,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:39:22,303 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:39:22,303 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:39:22,303 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:39:22,304 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:39:22,304 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:39:22,304 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:39:22,305 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:39:22,305 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:39:22,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:39:22,306 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:39:22,307 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:39:22,307 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:39:22,307 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:39:22,308 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:39:22,308 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:39:22,308 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:39:22,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:39:22,310 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 11:39:22,325 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:39:22,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:39:22,326 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:39:22,326 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:39:22,326 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:39:22,327 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:39:22,327 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:39:22,327 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:39:22,327 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:39:22,327 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:39:22,327 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:39:22,327 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:39:22,328 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 11:39:22,328 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 11:39:22,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:39:22,328 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:39:22,328 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 11:39:22,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:39:22,328 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:39:22,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:39:22,328 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 11:39:22,329 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 11:39:22,329 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 11:39:22,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:39:22,329 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 11:39:22,329 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 11:39:22,329 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 11:39:22,329 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:39:22,329 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:39:22,329 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:39:22,329 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 11:39:22,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:39:22,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:39:22,330 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:39:22,330 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:39:22,330 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 11:39:22,330 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 11:39:22,330 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:39:22,330 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 11:39:22,330 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_f64fe674-e5f9-4df1-b7e3-1134bb063941/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 [2022-12-14 11:39:22,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:39:22,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:39:22,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:39:22,568 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:39:22,568 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:39:22,569 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2022-12-14 11:39:25,171 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:39:25,319 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:39:25,319 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2022-12-14 11:39:25,326 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/data/41f22e85e/0244799823e34620bf492ff7316f6536/FLAG056cc44a3 [2022-12-14 11:39:25,337 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/data/41f22e85e/0244799823e34620bf492ff7316f6536 [2022-12-14 11:39:25,339 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:39:25,340 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:39:25,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:39:25,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:39:25,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:39:25,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:39:25" (1/1) ... [2022-12-14 11:39:25,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42c80c75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:39:25, skipping insertion in model container [2022-12-14 11:39:25,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:39:25" (1/1) ... [2022-12-14 11:39:25,354 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:39:25,372 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:39:25,506 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:39:25,509 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:39:25,510 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:39:25,511 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:39:25,515 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:39:25,516 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:39:25,517 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:39:25,518 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:39:25,524 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_f64fe674-e5f9-4df1-b7e3-1134bb063941/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c[2987,3000] [2022-12-14 11:39:25,534 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:39:25,546 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 11:39:25,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:39:25,555 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:39:25,556 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:39:25,557 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:39:25,558 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:39:25,559 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:39:25,560 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:39:25,560 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:39:25,561 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:39:25,565 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_f64fe674-e5f9-4df1-b7e3-1134bb063941/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c[2987,3000] [2022-12-14 11:39:25,568 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:39:25,574 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:39:25,587 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:39:25,588 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:39:25,589 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:39:25,590 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:39:25,591 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:39:25,592 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:39:25,592 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:39:25,593 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:39:25,596 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_f64fe674-e5f9-4df1-b7e3-1134bb063941/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c[2987,3000] [2022-12-14 11:39:25,599 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:39:25,614 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:39:25,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:39:25 WrapperNode [2022-12-14 11:39:25,615 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:39:25,616 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:39:25,616 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:39:25,616 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:39:25,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:39:25" (1/1) ... [2022-12-14 11:39:25,633 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:39:25" (1/1) ... [2022-12-14 11:39:25,657 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 193 [2022-12-14 11:39:25,657 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:39:25,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:39:25,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:39:25,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:39:25,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:39:25" (1/1) ... [2022-12-14 11:39:25,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:39:25" (1/1) ... [2022-12-14 11:39:25,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:39:25" (1/1) ... [2022-12-14 11:39:25,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:39:25" (1/1) ... [2022-12-14 11:39:25,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:39:25" (1/1) ... [2022-12-14 11:39:25,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:39:25" (1/1) ... [2022-12-14 11:39:25,685 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:39:25" (1/1) ... [2022-12-14 11:39:25,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:39:25" (1/1) ... [2022-12-14 11:39:25,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:39:25,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:39:25,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:39:25,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:39:25,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:39:25" (1/1) ... [2022-12-14 11:39:25,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:39:25,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:39:25,719 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:39:25,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:39:25,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:39:25,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 11:39:25,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 11:39:25,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 11:39:25,754 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 11:39:25,754 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 11:39:25,754 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 11:39:25,754 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 11:39:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 11:39:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 11:39:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 11:39:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:39:25,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:39:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 11:39:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 11:39:25,757 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 11:39:25,857 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:39:25,859 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:39:26,284 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:39:26,388 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:39:26,388 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 11:39:26,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:39:26 BoogieIcfgContainer [2022-12-14 11:39:26,390 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:39:26,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:39:26,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:39:26,394 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:39:26,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:39:25" (1/3) ... [2022-12-14 11:39:26,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76b56ef4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:39:26, skipping insertion in model container [2022-12-14 11:39:26,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:39:25" (2/3) ... [2022-12-14 11:39:26,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76b56ef4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:39:26, skipping insertion in model container [2022-12-14 11:39:26,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:39:26" (3/3) ... [2022-12-14 11:39:26,396 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-two-queue.wvr.c [2022-12-14 11:39:26,409 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:39:26,409 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-12-14 11:39:26,409 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 11:39:26,459 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-14 11:39:26,492 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 11:39:26,507 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 195 transitions, 406 flow [2022-12-14 11:39:26,510 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 195 transitions, 406 flow [2022-12-14 11:39:26,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 195 transitions, 406 flow [2022-12-14 11:39:26,578 INFO L130 PetriNetUnfolder]: 13/193 cut-off events. [2022-12-14 11:39:26,578 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-14 11:39:26,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 193 events. 13/193 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 175 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 147. Up to 2 conditions per place. [2022-12-14 11:39:26,583 INFO L119 LiptonReduction]: Number of co-enabled transitions 1036 [2022-12-14 11:39:51,623 INFO L134 LiptonReduction]: Checked pairs total: 2056 [2022-12-14 11:39:51,624 INFO L136 LiptonReduction]: Total number of compositions: 214 [2022-12-14 11:39:51,631 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 43 transitions, 102 flow [2022-12-14 11:39:51,653 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 265 states, 163 states have (on average 4.085889570552148) internal successors, (666), 264 states have internal predecessors, (666), 0 states have call successors, (0), 0 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 11:39:51,666 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:39:51,674 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;@7cdedde7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:39:51,674 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2022-12-14 11:39:51,677 INFO L276 IsEmpty]: Start isEmpty. Operand has 265 states, 163 states have (on average 4.085889570552148) internal successors, (666), 264 states have internal predecessors, (666), 0 states have call successors, (0), 0 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 11:39:51,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 11:39:51,681 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:39:51,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 11:39:51,682 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 11:39:51,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:39:51,687 INFO L85 PathProgramCache]: Analyzing trace with hash 28178, now seen corresponding path program 1 times [2022-12-14 11:39:51,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:39:51,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425500203] [2022-12-14 11:39:51,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:39:51,703 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 11:39:51,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:39:51,704 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:51,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:51,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:39:51,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:39:51,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:51,844 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 11:39:51,845 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-14 11:39:51,865 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 11:39:51,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:39:51,866 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:39:51,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425500203] [2022-12-14 11:39:51,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425500203] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:39:51,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:39:51,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 11:39:51,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624197180] [2022-12-14 11:39:51,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:39:51,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:39:51,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:39:51,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:39:51,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:39:51,896 INFO L87 Difference]: Start difference. First operand has 265 states, 163 states have (on average 4.085889570552148) internal successors, (666), 264 states have internal predecessors, (666), 0 states have call successors, (0), 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 11:39:52,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:39:52,078 INFO L93 Difference]: Finished difference Result 262 states and 663 transitions. [2022-12-14 11:39:52,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:39:52,079 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 11:39:52,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:39:52,086 INFO L225 Difference]: With dead ends: 262 [2022-12-14 11:39:52,086 INFO L226 Difference]: Without dead ends: 262 [2022-12-14 11:39:52,087 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 11:39:52,089 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:39:52,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 0 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:39:52,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-12-14 11:39:52,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2022-12-14 11:39:52,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 163 states have (on average 4.067484662576687) internal successors, (663), 261 states have internal predecessors, (663), 0 states have call successors, (0), 0 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 11:39:52,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 663 transitions. [2022-12-14 11:39:52,123 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 663 transitions. Word has length 2 [2022-12-14 11:39:52,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:39:52,123 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 663 transitions. [2022-12-14 11:39:52,123 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 11:39:52,123 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 663 transitions. [2022-12-14 11:39:52,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 11:39:52,124 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:39:52,124 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 11:39:52,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:52,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:52,326 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 11:39:52,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:39:52,328 INFO L85 PathProgramCache]: Analyzing trace with hash 28179, now seen corresponding path program 1 times [2022-12-14 11:39:52,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:39:52,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053484842] [2022-12-14 11:39:52,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:39:52,330 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 11:39:52,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:39:52,334 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:52,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:52,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:39:52,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:39:52,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:52,484 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 11:39:52,484 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 11:39:52,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:39:52,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:39:52,507 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:39:52,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053484842] [2022-12-14 11:39:52,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1053484842] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:39:52,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:39:52,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 11:39:52,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103112929] [2022-12-14 11:39:52,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:39:52,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:39:52,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:39:52,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:39:52,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:39:52,510 INFO L87 Difference]: Start difference. First operand 262 states and 663 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 11:39:52,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:39:52,837 INFO L93 Difference]: Finished difference Result 521 states and 1323 transitions. [2022-12-14 11:39:52,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:39:52,837 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 11:39:52,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:39:52,839 INFO L225 Difference]: With dead ends: 521 [2022-12-14 11:39:52,839 INFO L226 Difference]: Without dead ends: 521 [2022-12-14 11:39:52,840 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 11:39:52,840 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:39:52,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 0 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:39:52,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-12-14 11:39:52,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 264. [2022-12-14 11:39:52,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 165 states have (on average 4.054545454545455) internal successors, (669), 263 states have internal predecessors, (669), 0 states have call successors, (0), 0 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 11:39:52,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 669 transitions. [2022-12-14 11:39:52,854 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 669 transitions. Word has length 2 [2022-12-14 11:39:52,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:39:52,854 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 669 transitions. [2022-12-14 11:39:52,854 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 11:39:52,854 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 669 transitions. [2022-12-14 11:39:52,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 11:39:52,854 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:39:52,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 11:39:52,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:53,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:53,057 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 11:39:53,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:39:53,058 INFO L85 PathProgramCache]: Analyzing trace with hash 877951, now seen corresponding path program 1 times [2022-12-14 11:39:53,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:39:53,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576567057] [2022-12-14 11:39:53,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:39:53,060 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 11:39:53,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:39:53,063 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:53,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:53,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:39:53,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:39:53,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:53,233 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 11:39:53,233 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 11:39:53,280 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 11:39:53,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:39:53,461 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 11:39:53,461 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:39:53,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576567057] [2022-12-14 11:39:53,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576567057] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:39:53,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2066294811] [2022-12-14 11:39:53,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:39:53,462 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:39:53,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:39:53,463 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:39:53,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-12-14 11:39:53,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:39:53,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:39:53,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:53,604 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 11:39:53,604 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 11:39:53,631 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 11:39:53,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:39:53,697 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 11:39:53,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2066294811] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:39:53,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339869329] [2022-12-14 11:39:53,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:39:53,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:39:53,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:39:53,699 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:39:53,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 11:39:53,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:39:53,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:39:53,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:53,801 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 11:39:53,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 11:39:53,841 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 11:39:53,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:39:53,980 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 11:39:53,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339869329] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:39:53,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:39:53,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-12-14 11:39:53,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615522635] [2022-12-14 11:39:53,980 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:39:53,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 11:39:53,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:39:53,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 11:39:53,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:39:53,981 INFO L87 Difference]: Start difference. First operand 264 states and 669 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 11:39:55,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:39:55,860 INFO L93 Difference]: Finished difference Result 1041 states and 2649 transitions. [2022-12-14 11:39:55,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:39:55,861 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 11:39:55,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:39:55,868 INFO L225 Difference]: With dead ends: 1041 [2022-12-14 11:39:55,868 INFO L226 Difference]: Without dead ends: 1041 [2022-12-14 11:39:55,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-14 11:39:55,869 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 307 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:39:55,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 0 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 11:39:55,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2022-12-14 11:39:55,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 270. [2022-12-14 11:39:55,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 171 states have (on average 4.017543859649122) internal successors, (687), 269 states have internal predecessors, (687), 0 states have call successors, (0), 0 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 11:39:55,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 687 transitions. [2022-12-14 11:39:55,886 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 687 transitions. Word has length 3 [2022-12-14 11:39:55,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:39:55,886 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 687 transitions. [2022-12-14 11:39:55,887 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 11:39:55,887 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 687 transitions. [2022-12-14 11:39:55,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 11:39:55,887 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:39:55,887 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 11:39:55,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2022-12-14 11:39:56,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:56,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 11:39:56,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:39:56,491 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 11:39:56,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:39:56,493 INFO L85 PathProgramCache]: Analyzing trace with hash 878655, now seen corresponding path program 1 times [2022-12-14 11:39:56,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:39:56,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [311293907] [2022-12-14 11:39:56,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:39:56,495 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 11:39:56,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:39:56,497 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:56,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:39:56,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:39:56,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:56,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:39:56,607 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 11:39:56,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2022-12-14 11:39:56,665 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 11:39:56,665 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 11:39:56,692 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 11:39:56,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:39:56,692 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:39:56,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [311293907] [2022-12-14 11:39:56,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [311293907] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:39:56,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:39:56,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 11:39:56,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78221754] [2022-12-14 11:39:56,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:39:56,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:39:56,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:39:56,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:39:56,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:39:56,694 INFO L87 Difference]: Start difference. First operand 270 states and 687 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 11:39:56,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:39:56,863 INFO L93 Difference]: Finished difference Result 220 states and 535 transitions. [2022-12-14 11:39:56,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:39:56,864 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 11:39:56,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:39:56,864 INFO L225 Difference]: With dead ends: 220 [2022-12-14 11:39:56,864 INFO L226 Difference]: Without dead ends: 220 [2022-12-14 11:39:56,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 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 11:39:56,865 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:39:56,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:39:56,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-12-14 11:39:56,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2022-12-14 11:39:56,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 147 states have (on average 3.639455782312925) internal successors, (535), 219 states have internal predecessors, (535), 0 states have call successors, (0), 0 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 11:39:56,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 535 transitions. [2022-12-14 11:39:56,871 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 535 transitions. Word has length 3 [2022-12-14 11:39:56,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:39:56,871 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 535 transitions. [2022-12-14 11:39:56,871 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 11:39:56,872 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 535 transitions. [2022-12-14 11:39:56,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 11:39:56,872 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:39:56,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 11:39:56,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:57,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:57,074 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 11:39:57,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:39:57,075 INFO L85 PathProgramCache]: Analyzing trace with hash 878656, now seen corresponding path program 1 times [2022-12-14 11:39:57,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:39:57,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [931877142] [2022-12-14 11:39:57,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:39:57,078 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 11:39:57,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:39:57,081 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:57,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:39:57,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:39:57,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:57,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:39:57,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:39:57,251 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 11:39:57,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-12-14 11:39:57,261 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 10 treesize of output 8 [2022-12-14 11:39:57,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:39:57,298 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 11:39:57,320 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 11:39:57,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:39:57,321 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:39:57,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [931877142] [2022-12-14 11:39:57,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [931877142] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:39:57,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:39:57,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:39:57,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430305629] [2022-12-14 11:39:57,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:39:57,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:39:57,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:39:57,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:39:57,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:39:57,323 INFO L87 Difference]: Start difference. First operand 220 states and 535 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 11:39:57,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:39:57,528 INFO L93 Difference]: Finished difference Result 170 states and 383 transitions. [2022-12-14 11:39:57,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:39:57,529 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 11:39:57,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:39:57,530 INFO L225 Difference]: With dead ends: 170 [2022-12-14 11:39:57,530 INFO L226 Difference]: Without dead ends: 170 [2022-12-14 11:39:57,530 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 11:39:57,531 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 62 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:39:57,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 0 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:39:57,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-12-14 11:39:57,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-12-14 11:39:57,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 123 states have (on average 3.113821138211382) internal successors, (383), 169 states have internal predecessors, (383), 0 states have call successors, (0), 0 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 11:39:57,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 383 transitions. [2022-12-14 11:39:57,536 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 383 transitions. Word has length 3 [2022-12-14 11:39:57,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:39:57,536 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 383 transitions. [2022-12-14 11:39:57,537 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 11:39:57,537 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 383 transitions. [2022-12-14 11:39:57,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 11:39:57,537 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:39:57,537 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 11:39:57,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:57,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:57,739 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 11:39:57,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:39:57,740 INFO L85 PathProgramCache]: Analyzing trace with hash 844407025, now seen corresponding path program 1 times [2022-12-14 11:39:57,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:39:57,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1728991187] [2022-12-14 11:39:57,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:39:57,742 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 11:39:57,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:39:57,746 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:57,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:57,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:39:57,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:39:57,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:57,865 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 11:39:57,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:39:57,865 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:39:57,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1728991187] [2022-12-14 11:39:57,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1728991187] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:39:57,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:39:57,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 11:39:57,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812290910] [2022-12-14 11:39:57,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:39:57,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:39:57,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:39:57,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:39:57,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:39:57,867 INFO L87 Difference]: Start difference. First operand 170 states and 383 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 11:39:58,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:39:58,043 INFO L93 Difference]: Finished difference Result 220 states and 517 transitions. [2022-12-14 11:39:58,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:39:58,043 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 11:39:58,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:39:58,044 INFO L225 Difference]: With dead ends: 220 [2022-12-14 11:39:58,044 INFO L226 Difference]: Without dead ends: 218 [2022-12-14 11:39:58,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 11:39:58,045 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:39:58,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 0 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:39:58,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-12-14 11:39:58,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 176. [2022-12-14 11:39:58,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 129 states have (on average 3.2713178294573644) internal successors, (422), 175 states have internal predecessors, (422), 0 states have call successors, (0), 0 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 11:39:58,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 422 transitions. [2022-12-14 11:39:58,052 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 422 transitions. Word has length 5 [2022-12-14 11:39:58,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:39:58,053 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 422 transitions. [2022-12-14 11:39:58,053 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 11:39:58,053 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 422 transitions. [2022-12-14 11:39:58,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 11:39:58,053 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:39:58,053 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 11:39:58,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-12-14 11:39:58,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:58,254 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 11:39:58,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:39:58,254 INFO L85 PathProgramCache]: Analyzing trace with hash 844407044, now seen corresponding path program 1 times [2022-12-14 11:39:58,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:39:58,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670340346] [2022-12-14 11:39:58,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:39:58,254 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 11:39:58,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:39:58,255 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:58,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:58,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:39:58,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:39:58,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:58,328 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-14 11:39:58,328 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 2 case distinctions, treesize of input 26 treesize of output 33 [2022-12-14 11:39:58,351 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 11:39:58,352 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 11:39:58,361 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 11:39:58,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:39:58,361 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:39:58,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670340346] [2022-12-14 11:39:58,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670340346] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:39:58,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:39:58,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 11:39:58,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383260332] [2022-12-14 11:39:58,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:39:58,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:39:58,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:39:58,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:39:58,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:39:58,362 INFO L87 Difference]: Start difference. First operand 176 states and 422 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 11:39:58,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:39:58,486 INFO L93 Difference]: Finished difference Result 164 states and 399 transitions. [2022-12-14 11:39:58,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:39:58,487 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 11:39:58,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:39:58,488 INFO L225 Difference]: With dead ends: 164 [2022-12-14 11:39:58,488 INFO L226 Difference]: Without dead ends: 164 [2022-12-14 11:39:58,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 11:39:58,489 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:39:58,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 0 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:39:58,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-12-14 11:39:58,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-12-14 11:39:58,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 126 states have (on average 3.1666666666666665) internal successors, (399), 163 states have internal predecessors, (399), 0 states have call successors, (0), 0 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 11:39:58,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 399 transitions. [2022-12-14 11:39:58,493 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 399 transitions. Word has length 5 [2022-12-14 11:39:58,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:39:58,493 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 399 transitions. [2022-12-14 11:39:58,493 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 11:39:58,493 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 399 transitions. [2022-12-14 11:39:58,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 11:39:58,493 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:39:58,493 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 11:39:58,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-14 11:39:58,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:58,695 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 11:39:58,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:39:58,696 INFO L85 PathProgramCache]: Analyzing trace with hash 844407045, now seen corresponding path program 1 times [2022-12-14 11:39:58,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:39:58,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689673393] [2022-12-14 11:39:58,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:39:58,698 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 11:39:58,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:39:58,701 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:58,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:39:58,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 11:39:58,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:58,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:39:58,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:39:58,855 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 11:39:58,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-12-14 11:39:58,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-14 11:39:58,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:39:58,890 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 11:39:58,934 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 11:39:58,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:39:58,934 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:39:58,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689673393] [2022-12-14 11:39:58,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689673393] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:39:58,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:39:58,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:39:58,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523829110] [2022-12-14 11:39:58,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:39:58,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:39:58,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:39:58,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:39:58,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:39:58,936 INFO L87 Difference]: Start difference. First operand 164 states and 399 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 11:39:59,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:39:59,130 INFO L93 Difference]: Finished difference Result 152 states and 376 transitions. [2022-12-14 11:39:59,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:39:59,131 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 11:39:59,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:39:59,132 INFO L225 Difference]: With dead ends: 152 [2022-12-14 11:39:59,132 INFO L226 Difference]: Without dead ends: 152 [2022-12-14 11:39:59,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:39:59,133 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:39:59,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 0 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:39:59,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-12-14 11:39:59,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-12-14 11:39:59,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 123 states have (on average 3.0569105691056913) internal successors, (376), 151 states have internal predecessors, (376), 0 states have call successors, (0), 0 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 11:39:59,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 376 transitions. [2022-12-14 11:39:59,139 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 376 transitions. Word has length 5 [2022-12-14 11:39:59,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:39:59,139 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 376 transitions. [2022-12-14 11:39:59,139 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 11:39:59,139 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 376 transitions. [2022-12-14 11:39:59,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 11:39:59,140 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:39:59,140 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 11:39:59,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:59,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:59,342 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 11:39:59,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:39:59,343 INFO L85 PathProgramCache]: Analyzing trace with hash 844406924, now seen corresponding path program 1 times [2022-12-14 11:39:59,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:39:59,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [38703924] [2022-12-14 11:39:59,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:39:59,344 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 11:39:59,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:39:59,347 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:59,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-14 11:39:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:39:59,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:39:59,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:59,523 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 11:39:59,533 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 11:39:59,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:39:59,533 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:39:59,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [38703924] [2022-12-14 11:39:59,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [38703924] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:39:59,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:39:59,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:39:59,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250034443] [2022-12-14 11:39:59,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:39:59,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:39:59,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:39:59,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:39:59,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:39:59,534 INFO L87 Difference]: Start difference. First operand 152 states and 376 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:39:59,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:39:59,665 INFO L93 Difference]: Finished difference Result 122 states and 291 transitions. [2022-12-14 11:39:59,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:39:59,666 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 11:39:59,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:39:59,666 INFO L225 Difference]: With dead ends: 122 [2022-12-14 11:39:59,666 INFO L226 Difference]: Without dead ends: 122 [2022-12-14 11:39:59,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:39:59,667 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:39:59,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 0 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:39:59,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-12-14 11:39:59,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-12-14 11:39:59,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 102 states have (on average 2.8529411764705883) internal successors, (291), 121 states have internal predecessors, (291), 0 states have call successors, (0), 0 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 11:39:59,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 291 transitions. [2022-12-14 11:39:59,670 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 291 transitions. Word has length 5 [2022-12-14 11:39:59,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:39:59,670 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 291 transitions. [2022-12-14 11:39:59,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:39:59,670 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 291 transitions. [2022-12-14 11:39:59,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 11:39:59,670 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:39:59,670 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 11:39:59,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-14 11:39:59,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:59,872 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 11:39:59,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:39:59,873 INFO L85 PathProgramCache]: Analyzing trace with hash 844406925, now seen corresponding path program 1 times [2022-12-14 11:39:59,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:39:59,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [769505001] [2022-12-14 11:39:59,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:39:59,874 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 11:39:59,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:39:59,877 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:59,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-14 11:39:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:39:59,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:39:59,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:59,992 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 11:39:59,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:39:59,993 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:39:59,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [769505001] [2022-12-14 11:39:59,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [769505001] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:39:59,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:39:59,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:39:59,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85060877] [2022-12-14 11:39:59,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:39:59,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:39:59,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:39:59,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:39:59,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:39:59,994 INFO L87 Difference]: Start difference. First operand 122 states and 291 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:00,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:40:00,246 INFO L93 Difference]: Finished difference Result 159 states and 354 transitions. [2022-12-14 11:40:00,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:40:00,247 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 11:40:00,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:40:00,247 INFO L225 Difference]: With dead ends: 159 [2022-12-14 11:40:00,247 INFO L226 Difference]: Without dead ends: 153 [2022-12-14 11:40:00,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:40:00,248 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:40:00,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 0 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:40:00,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-12-14 11:40:00,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 139. [2022-12-14 11:40:00,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 119 states have (on average 2.7815126050420167) internal successors, (331), 138 states have internal predecessors, (331), 0 states have call successors, (0), 0 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 11:40:00,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 331 transitions. [2022-12-14 11:40:00,251 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 331 transitions. Word has length 5 [2022-12-14 11:40:00,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:40:00,251 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 331 transitions. [2022-12-14 11:40:00,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:00,252 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 331 transitions. [2022-12-14 11:40:00,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 11:40:00,252 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:40:00,252 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 11:40:00,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-14 11:40:00,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:40:00,452 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 11:40:00,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:40:00,453 INFO L85 PathProgramCache]: Analyzing trace with hash 389605651, now seen corresponding path program 2 times [2022-12-14 11:40:00,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:40:00,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024206468] [2022-12-14 11:40:00,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:40:00,453 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 11:40:00,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:40:00,454 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:40:00,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:40:00,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:40:00,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:40:00,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:40:00,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:00,579 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 11:40:00,579 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 11:40:00,697 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 11:40:00,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:01,351 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 11:40:01,351 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:40:01,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024206468] [2022-12-14 11:40:01,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024206468] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:40:01,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [320364966] [2022-12-14 11:40:01,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:40:01,351 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:40:01,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:40:01,352 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:40:01,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-12-14 11:40:01,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:40:01,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:40:01,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:40:01,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:01,533 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 11:40:01,534 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 11:40:01,603 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 11:40:01,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:01,741 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 11:40:01,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [320364966] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:40:01,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311369013] [2022-12-14 11:40:01,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:40:01,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:40:01,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:40:01,742 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:40:01,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 11:40:01,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:40:01,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:40:01,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:40:01,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:01,866 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 11:40:01,866 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 11:40:01,918 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 11:40:01,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:02,044 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 11:40:02,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311369013] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:40:02,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:40:02,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2022-12-14 11:40:02,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347772374] [2022-12-14 11:40:02,044 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:40:02,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 11:40:02,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:40:02,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 11:40:02,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:40:02,045 INFO L87 Difference]: Start difference. First operand 139 states and 331 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 11:40:05,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 11:40:07,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 11:40:08,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 11:40:09,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 11:40:12,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 11:40:14,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:40:14,645 INFO L93 Difference]: Finished difference Result 927 states and 2240 transitions. [2022-12-14 11:40:14,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 11:40:14,646 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 11:40:14,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:40:14,649 INFO L225 Difference]: With dead ends: 927 [2022-12-14 11:40:14,649 INFO L226 Difference]: Without dead ends: 927 [2022-12-14 11:40:14,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-12-14 11:40:14,649 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 577 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 76 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:40:14,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [577 Valid, 0 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 673 Invalid, 1 Unknown, 0 Unchecked, 11.5s Time] [2022-12-14 11:40:14,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-12-14 11:40:14,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 150. [2022-12-14 11:40:14,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 130 states have (on average 2.7153846153846155) internal successors, (353), 149 states have internal predecessors, (353), 0 states have call successors, (0), 0 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 11:40:14,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 353 transitions. [2022-12-14 11:40:14,656 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 353 transitions. Word has length 6 [2022-12-14 11:40:14,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:40:14,656 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 353 transitions. [2022-12-14 11:40:14,657 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 11:40:14,657 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 353 transitions. [2022-12-14 11:40:14,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 11:40:14,657 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:40:14,657 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 11:40:14,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2022-12-14 11:40:14,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:40:15,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 11:40:15,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:40:15,259 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 11:40:15,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:40:15,260 INFO L85 PathProgramCache]: Analyzing trace with hash 406903343, now seen corresponding path program 1 times [2022-12-14 11:40:15,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:40:15,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959872522] [2022-12-14 11:40:15,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:40:15,262 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 11:40:15,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:40:15,264 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:40:15,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-14 11:40:15,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:40:15,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 11:40:15,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:15,350 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 11:40:15,457 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 11:40:15,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:15,954 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 11:40:15,954 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:40:15,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959872522] [2022-12-14 11:40:15,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959872522] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:40:15,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1762892380] [2022-12-14 11:40:15,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:40:15,955 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:40:15,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:40:15,956 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:40:15,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-12-14 11:40:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:40:16,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 11:40:16,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:16,078 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 11:40:16,212 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 11:40:16,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:16,592 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 11:40:16,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1762892380] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:40:16,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764541910] [2022-12-14 11:40:16,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:40:16,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:40:16,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:40:16,593 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:40:16,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 11:40:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:40:16,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 11:40:16,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:16,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 11:40:16,726 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 11:40:16,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:16,910 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 11:40:16,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764541910] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:40:16,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:40:16,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-12-14 11:40:16,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882099955] [2022-12-14 11:40:16,910 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:40:16,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 11:40:16,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:40:16,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 11:40:16,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-12-14 11:40:16,911 INFO L87 Difference]: Start difference. First operand 150 states and 353 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 11:40:21,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:40:21,673 INFO L93 Difference]: Finished difference Result 330 states and 750 transitions. [2022-12-14 11:40:21,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 11:40:21,674 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 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 11:40:21,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:40:21,675 INFO L225 Difference]: With dead ends: 330 [2022-12-14 11:40:21,675 INFO L226 Difference]: Without dead ends: 330 [2022-12-14 11:40:21,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-12-14 11:40:21,676 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 198 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:40:21,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 0 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 11:40:21,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-12-14 11:40:21,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 201. [2022-12-14 11:40:21,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 181 states have (on average 2.8950276243093924) internal successors, (524), 200 states have internal predecessors, (524), 0 states have call successors, (0), 0 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 11:40:21,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 524 transitions. [2022-12-14 11:40:21,683 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 524 transitions. Word has length 6 [2022-12-14 11:40:21,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:40:21,683 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 524 transitions. [2022-12-14 11:40:21,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 11:40:21,683 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 524 transitions. [2022-12-14 11:40:21,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 11:40:21,683 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:40:21,683 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:40:21,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 11:40:21,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-14 11:40:22,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2022-12-14 11:40:22,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:40:22,285 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 11:40:22,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:40:22,287 INFO L85 PathProgramCache]: Analyzing trace with hash -273630097, now seen corresponding path program 1 times [2022-12-14 11:40:22,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:40:22,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [795306591] [2022-12-14 11:40:22,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:40:22,288 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 11:40:22,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:40:22,291 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:40:22,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:40:22,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:40:22,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:40:22,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:22,496 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 11:40:22,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:40:22,496 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:40:22,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [795306591] [2022-12-14 11:40:22,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [795306591] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:40:22,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:40:22,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:40:22,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818758934] [2022-12-14 11:40:22,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:40:22,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:40:22,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:40:22,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:40:22,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:40:22,497 INFO L87 Difference]: Start difference. First operand 201 states and 524 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 11:40:22,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:40:22,707 INFO L93 Difference]: Finished difference Result 269 states and 639 transitions. [2022-12-14 11:40:22,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:40:22,707 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 11:40:22,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:40:22,708 INFO L225 Difference]: With dead ends: 269 [2022-12-14 11:40:22,708 INFO L226 Difference]: Without dead ends: 261 [2022-12-14 11:40:22,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 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 11:40:22,709 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:40:22,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 0 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:40:22,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-12-14 11:40:22,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 231. [2022-12-14 11:40:22,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 211 states have (on average 2.7630331753554502) internal successors, (583), 230 states have internal predecessors, (583), 0 states have call successors, (0), 0 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 11:40:22,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 583 transitions. [2022-12-14 11:40:22,714 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 583 transitions. Word has length 7 [2022-12-14 11:40:22,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:40:22,714 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 583 transitions. [2022-12-14 11:40:22,714 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 11:40:22,714 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 583 transitions. [2022-12-14 11:40:22,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 11:40:22,714 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:40:22,714 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:40:22,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:40:22,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:40:22,916 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 11:40:22,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:40:22,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1282508931, now seen corresponding path program 1 times [2022-12-14 11:40:22,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:40:22,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1153986596] [2022-12-14 11:40:22,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:40:22,919 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 11:40:22,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:40:22,920 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:40:22,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:40:23,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:40:23,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 11:40:23,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:23,071 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 11:40:23,071 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-14 11:40:23,089 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 11:40:23,090 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 11:40:23,105 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 11:40:23,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:40:23,105 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:40:23,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1153986596] [2022-12-14 11:40:23,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1153986596] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:40:23,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:40:23,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:40:23,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88395369] [2022-12-14 11:40:23,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:40:23,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:40:23,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:40:23,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:40:23,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:40:23,106 INFO L87 Difference]: Start difference. First operand 231 states and 583 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 11:40:23,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:40:23,229 INFO L93 Difference]: Finished difference Result 191 states and 452 transitions. [2022-12-14 11:40:23,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:40:23,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 11:40:23,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:40:23,230 INFO L225 Difference]: With dead ends: 191 [2022-12-14 11:40:23,230 INFO L226 Difference]: Without dead ends: 191 [2022-12-14 11:40:23,230 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 11:40:23,230 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:40:23,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 0 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:40:23,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-12-14 11:40:23,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-12-14 11:40:23,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 179 states have (on average 2.525139664804469) internal successors, (452), 190 states have internal predecessors, (452), 0 states have call successors, (0), 0 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 11:40:23,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 452 transitions. [2022-12-14 11:40:23,236 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 452 transitions. Word has length 8 [2022-12-14 11:40:23,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:40:23,236 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 452 transitions. [2022-12-14 11:40:23,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 11:40:23,236 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 452 transitions. [2022-12-14 11:40:23,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 11:40:23,237 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:40:23,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:40:23,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-14 11:40:23,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:40:23,438 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 11:40:23,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:40:23,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1282508932, now seen corresponding path program 1 times [2022-12-14 11:40:23,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:40:23,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625248968] [2022-12-14 11:40:23,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:40:23,441 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 11:40:23,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:40:23,444 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:40:23,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:40:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:40:23,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 11:40:23,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:23,624 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 11:40:23,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 11:40:23,674 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 11:40:23,674 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-14 11:40:23,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:23,758 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 11:40:23,767 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 11:40:23,767 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 11:40:23,825 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 11:40:23,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:25,315 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 11:40:25,315 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:40:25,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625248968] [2022-12-14 11:40:25,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625248968] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:40:25,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1045173998] [2022-12-14 11:40:25,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:40:25,316 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:40:25,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:40:25,317 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:40:25,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-12-14 11:40:25,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:40:25,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 11:40:25,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:25,528 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 11:40:25,528 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 11:40:25,582 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 11:40:25,582 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-14 11:40:25,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:25,716 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 11:40:25,726 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 11:40:25,726 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 11:40:25,762 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 11:40:25,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:33,171 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 11:40:33,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1045173998] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:40:33,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3919691] [2022-12-14 11:40:33,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:40:33,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:40:33,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:40:33,173 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:40:33,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 11:40:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:40:33,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 11:40:33,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:33,315 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 11:40:33,316 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 11:40:33,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:40:33,403 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 11:40:33,416 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 11:40:33,417 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 11:40:33,465 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 11:40:33,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:35,471 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:40:35,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 89 [2022-12-14 11:40:40,968 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 11:40:40,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3919691] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:40:40,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:40:40,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 12 [2022-12-14 11:40:40,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146080511] [2022-12-14 11:40:40,969 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:40:40,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 11:40:40,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:40:40,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 11:40:40,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=123, Unknown=4, NotChecked=0, Total=182 [2022-12-14 11:40:40,970 INFO L87 Difference]: Start difference. First operand 191 states and 452 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 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 11:41:16,352 WARN L233 SmtUtils]: Spent 35.18s on a formula simplification. DAG size of input: 78 DAG size of output: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:41:52,504 WARN L233 SmtUtils]: Spent 33.99s on a formula simplification. DAG size of input: 67 DAG size of output: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:41:59,183 WARN L233 SmtUtils]: Spent 6.59s on a formula simplification. DAG size of input: 75 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:42:01,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:42:21,859 WARN L233 SmtUtils]: Spent 18.83s on a formula simplification. DAG size of input: 77 DAG size of output: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:42:52,902 WARN L233 SmtUtils]: Spent 29.62s on a formula simplification. DAG size of input: 76 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:43:14,368 WARN L233 SmtUtils]: Spent 19.86s on a formula simplification. DAG size of input: 66 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:43:17,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:43:17,674 INFO L93 Difference]: Finished difference Result 473 states and 1076 transitions. [2022-12-14 11:43:17,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 11:43:17,676 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 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 11:43:17,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:43:17,677 INFO L225 Difference]: With dead ends: 473 [2022-12-14 11:43:17,678 INFO L226 Difference]: Without dead ends: 473 [2022-12-14 11:43:17,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 165.8s TimeCoverageRelationStatistics Valid=131, Invalid=326, Unknown=5, NotChecked=0, Total=462 [2022-12-14 11:43:17,678 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 198 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 22 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:43:17,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 0 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 306 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2022-12-14 11:43:17,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-12-14 11:43:17,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 273. [2022-12-14 11:43:17,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 261 states have (on average 2.57088122605364) internal successors, (671), 272 states have internal predecessors, (671), 0 states have call successors, (0), 0 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 11:43:17,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 671 transitions. [2022-12-14 11:43:17,686 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 671 transitions. Word has length 8 [2022-12-14 11:43:17,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:43:17,686 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 671 transitions. [2022-12-14 11:43:17,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 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 11:43:17,686 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 671 transitions. [2022-12-14 11:43:17,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 11:43:17,687 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:43:17,687 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2022-12-14 11:43:17,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-14 11:43:17,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:43:18,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2022-12-14 11:43:18,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:43:18,288 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 11:43:18,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:43:18,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1751578893, now seen corresponding path program 2 times [2022-12-14 11:43:18,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:43:18,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602349237] [2022-12-14 11:43:18,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:43:18,289 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 11:43:18,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:43:18,290 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:43:18,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-14 11:43:18,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 11:43:18,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:43:18,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 11:43:18,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:43:18,379 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 11:43:18,475 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 11:43:18,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:43:18,475 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:43:18,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602349237] [2022-12-14 11:43:18,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602349237] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:43:18,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:43:18,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:43:18,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206864695] [2022-12-14 11:43:18,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:43:18,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:43:18,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:43:18,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:43:18,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:43:18,476 INFO L87 Difference]: Start difference. First operand 273 states and 671 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:43:18,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:43:18,679 INFO L93 Difference]: Finished difference Result 237 states and 555 transitions. [2022-12-14 11:43:18,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:43:18,680 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 11:43:18,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:43:18,681 INFO L225 Difference]: With dead ends: 237 [2022-12-14 11:43:18,681 INFO L226 Difference]: Without dead ends: 237 [2022-12-14 11:43:18,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:43:18,682 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:43:18,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:43:18,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-12-14 11:43:18,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 158. [2022-12-14 11:43:18,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 151 states have (on average 2.2847682119205297) internal successors, (345), 157 states have internal predecessors, (345), 0 states have call successors, (0), 0 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 11:43:18,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 345 transitions. [2022-12-14 11:43:18,685 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 345 transitions. Word has length 9 [2022-12-14 11:43:18,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:43:18,685 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 345 transitions. [2022-12-14 11:43:18,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:43:18,686 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 345 transitions. [2022-12-14 11:43:18,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 11:43:18,686 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:43:18,686 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:43:18,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-12-14 11:43:18,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:43:18,888 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 11:43:18,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:43:18,889 INFO L85 PathProgramCache]: Analyzing trace with hash 2139955568, now seen corresponding path program 2 times [2022-12-14 11:43:18,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:43:18,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [145150629] [2022-12-14 11:43:18,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:43:18,890 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 11:43:18,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:43:18,893 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:43:18,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-12-14 11:43:18,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 11:43:18,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:43:19,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 11:43:19,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:43:19,077 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 11:43:19,077 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 11:43:19,159 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 11:43:19,159 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-14 11:43:19,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:43:19,262 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 11:43:19,281 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 11:43:19,281 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 11:43:19,352 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 11:43:19,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:43:19,353 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:43:19,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [145150629] [2022-12-14 11:43:19,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [145150629] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:43:19,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:43:19,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:43:19,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242383614] [2022-12-14 11:43:19,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:43:19,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:43:19,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:43:19,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:43:19,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:43:19,354 INFO L87 Difference]: Start difference. First operand 158 states and 345 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 11:43:19,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:43:19,533 INFO L93 Difference]: Finished difference Result 136 states and 287 transitions. [2022-12-14 11:43:19,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:43:19,534 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 11 [2022-12-14 11:43:19,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:43:19,534 INFO L225 Difference]: With dead ends: 136 [2022-12-14 11:43:19,534 INFO L226 Difference]: Without dead ends: 136 [2022-12-14 11:43:19,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:43:19,535 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 14 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:43:19,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 0 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:43:19,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-12-14 11:43:19,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2022-12-14 11:43:19,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 83 states have internal predecessors, (170), 0 states have call successors, (0), 0 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 11:43:19,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 170 transitions. [2022-12-14 11:43:19,536 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 170 transitions. Word has length 11 [2022-12-14 11:43:19,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:43:19,537 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 170 transitions. [2022-12-14 11:43:19,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 11:43:19,537 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 170 transitions. [2022-12-14 11:43:19,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 11:43:19,537 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:43:19,537 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-12-14 11:43:19,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-12-14 11:43:19,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:43:19,738 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 11:43:19,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:43:19,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1739239021, now seen corresponding path program 3 times [2022-12-14 11:43:19,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:43:19,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755908320] [2022-12-14 11:43:19,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:43:19,741 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 11:43:19,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:43:19,744 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:43:19,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:43:19,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 11:43:19,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:43:19,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 11:43:19,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:43:20,026 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 11:43:20,026 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 11:43:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:43:20,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:43:23,728 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:43:23,728 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:43:23,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755908320] [2022-12-14 11:43:23,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755908320] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:43:23,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [151435106] [2022-12-14 11:43:23,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:43:23,729 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:43:23,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:43:23,730 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:43:23,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-12-14 11:43:24,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 11:43:24,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:43:24,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 11:43:24,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:43:24,344 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 11:43:24,344 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 11:43:24,626 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:43:24,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:43:27,986 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:43:27,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [151435106] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:43:27,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494125981] [2022-12-14 11:43:27,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:43:27,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:43:27,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:43:27,988 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:43:27,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 11:43:29,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 11:43:29,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:43:29,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 11:43:29,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:43:30,010 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 11:43:30,010 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 11:43:30,171 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:43:30,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:43:30,540 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:43:30,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494125981] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:43:30,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:43:30,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 32 [2022-12-14 11:43:30,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904437978] [2022-12-14 11:43:30,540 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:43:30,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 11:43:30,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:43:30,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 11:43:30,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 11:43:30,541 INFO L87 Difference]: Start difference. First operand 84 states and 170 transitions. Second operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:43:43,742 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 11:43:45,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 11:43:47,748 WARN L539 Checker$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 11:43:49,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 11:43:51,755 WARN L539 Checker$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 11:43:53,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 11:43:55,760 WARN L539 Checker$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 11:43:57,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 11:43:59,810 WARN L539 Checker$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 11:44:01,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 11:44:03,756 WARN L539 Checker$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 11:44:05,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 11:44:07,762 WARN L539 Checker$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 11:44:09,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 11:44:11,065 WARN L539 Checker$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 11:44:13,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 11:44:15,071 WARN L539 Checker$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 11:44:24,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:44:24,842 INFO L93 Difference]: Finished difference Result 725 states and 1489 transitions. [2022-12-14 11:44:24,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 11:44:24,843 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 11:44:24,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:44:24,845 INFO L225 Difference]: With dead ends: 725 [2022-12-14 11:44:24,845 INFO L226 Difference]: Without dead ends: 725 [2022-12-14 11:44:24,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=618, Invalid=1274, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 11:44:24,846 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1580 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2762 mSolverCounterSat, 336 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1580 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 2762 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:44:24,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1580 Valid, 0 Invalid, 3113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 2762 Invalid, 15 Unknown, 0 Unchecked, 41.1s Time] [2022-12-14 11:44:24,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-12-14 11:44:24,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 106. [2022-12-14 11:44:24,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 103 states have (on average 2.0776699029126213) internal successors, (214), 105 states have internal predecessors, (214), 0 states have call successors, (0), 0 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 11:44:24,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2022-12-14 11:44:24,850 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 12 [2022-12-14 11:44:24,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:44:24,851 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2022-12-14 11:44:24,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:44:24,851 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2022-12-14 11:44:24,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 11:44:24,851 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:44:24,851 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:44:24,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-14 11:44:25,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-12-14 11:44:25,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:44:25,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:44:25,453 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 11:44:25,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:44:25,454 INFO L85 PathProgramCache]: Analyzing trace with hash 806646988, now seen corresponding path program 1 times [2022-12-14 11:44:25,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:44:25,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028714922] [2022-12-14 11:44:25,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:44:25,456 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 11:44:25,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:44:25,458 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:44:25,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-12-14 11:44:25,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:44:25,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:44:25,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:44:25,602 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 11:44:25,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:44:25,602 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:44:25,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028714922] [2022-12-14 11:44:25,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028714922] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:44:25,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:44:25,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 11:44:25,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563214541] [2022-12-14 11:44:25,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:44:25,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:44:25,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:44:25,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:44:25,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:44:25,604 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 11:44:25,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:44:25,728 INFO L93 Difference]: Finished difference Result 123 states and 248 transitions. [2022-12-14 11:44:25,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:44:25,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 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 11:44:25,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:44:25,729 INFO L225 Difference]: With dead ends: 123 [2022-12-14 11:44:25,729 INFO L226 Difference]: Without dead ends: 105 [2022-12-14 11:44:25,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 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 11:44:25,730 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:44:25,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:44:25,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-12-14 11:44:25,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2022-12-14 11:44:25,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 94 states have (on average 1.925531914893617) internal successors, (181), 96 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 11:44:25,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 181 transitions. [2022-12-14 11:44:25,733 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 181 transitions. Word has length 13 [2022-12-14 11:44:25,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:44:25,733 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 181 transitions. [2022-12-14 11:44:25,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 11:44:25,733 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 181 transitions. [2022-12-14 11:44:25,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 11:44:25,734 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:44:25,734 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:44:25,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 11:44:25,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:44:25,935 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 11:44:25,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:44:25,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1080857254, now seen corresponding path program 1 times [2022-12-14 11:44:25,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:44:25,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [679281112] [2022-12-14 11:44:25,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:44:25,937 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 11:44:25,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:44:25,940 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:44:25,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-12-14 11:44:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:44:26,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:44:26,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:44:26,112 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 11:44:26,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:44:26,112 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:44:26,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [679281112] [2022-12-14 11:44:26,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [679281112] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:44:26,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:44:26,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:44:26,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807571532] [2022-12-14 11:44:26,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:44:26,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:44:26,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:44:26,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:44:26,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:44:26,113 INFO L87 Difference]: Start difference. First operand 97 states and 181 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 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 11:44:26,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:44:26,240 INFO L93 Difference]: Finished difference Result 103 states and 189 transitions. [2022-12-14 11:44:26,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:44:26,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 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 17 [2022-12-14 11:44:26,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:44:26,242 INFO L225 Difference]: With dead ends: 103 [2022-12-14 11:44:26,242 INFO L226 Difference]: Without dead ends: 93 [2022-12-14 11:44:26,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 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 11:44:26,243 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:44:26,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:44:26,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-12-14 11:44:26,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-12-14 11:44:26,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 90 states have (on average 1.9) internal successors, (171), 92 states have internal predecessors, (171), 0 states have call successors, (0), 0 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 11:44:26,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 171 transitions. [2022-12-14 11:44:26,245 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 171 transitions. Word has length 17 [2022-12-14 11:44:26,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:44:26,245 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 171 transitions. [2022-12-14 11:44:26,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 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 11:44:26,246 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 171 transitions. [2022-12-14 11:44:26,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 11:44:26,246 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:44:26,246 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1] [2022-12-14 11:44:26,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-12-14 11:44:26,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:44:26,447 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 11:44:26,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:44:26,448 INFO L85 PathProgramCache]: Analyzing trace with hash -787810972, now seen corresponding path program 1 times [2022-12-14 11:44:26,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:44:26,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563618814] [2022-12-14 11:44:26,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:44:26,450 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 11:44:26,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:44:26,453 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:44:26,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:44:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:44:26,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 11:44:26,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:44:26,627 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 11:44:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:44:27,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:44:32,859 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:44:32,859 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:44:32,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563618814] [2022-12-14 11:44:32,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563618814] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:44:32,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [986701372] [2022-12-14 11:44:32,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:44:32,859 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:44:32,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:44:32,860 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:44:32,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-12-14 11:44:33,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:44:33,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 11:44:33,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:44:33,139 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 11:44:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:44:34,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:44:35,359 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:44:35,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [986701372] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:44:35,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135997059] [2022-12-14 11:44:35,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:44:35,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:44:35,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:44:35,360 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:44:35,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-14 11:44:35,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:44:35,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 11:44:35,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:44:35,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 11:44:35,863 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:44:35,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:44:36,630 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:44:36,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135997059] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:44:36,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:44:36,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16, 16, 16, 16] total 39 [2022-12-14 11:44:36,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988340371] [2022-12-14 11:44:36,631 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:44:36,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-14 11:44:36,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:44:36,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-14 11:44:36,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=1123, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 11:44:36,633 INFO L87 Difference]: Start difference. First operand 93 states and 171 transitions. Second operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 11:44:47,695 WARN L233 SmtUtils]: Spent 5.78s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:44:50,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 11:44:52,292 WARN L539 Checker$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 11:44:54,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 11:44:56,298 WARN L539 Checker$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 11:44:58,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 11:45:00,304 WARN L539 Checker$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 11:45:02,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 11:45:04,310 WARN L539 Checker$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 11:45:06,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 11:45:08,317 WARN L539 Checker$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 11:45:10,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 11:45:12,323 WARN L539 Checker$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 11:45:13,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 11:45:15,945 WARN L539 Checker$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 11:45:38,415 WARN L233 SmtUtils]: Spent 10.60s on a formula simplification. DAG size of input: 168 DAG size of output: 168 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:45:51,060 WARN L233 SmtUtils]: Spent 8.71s on a formula simplification. DAG size of input: 160 DAG size of output: 160 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:46:01,044 WARN L233 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 150 DAG size of output: 150 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:46:47,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:46:47,386 INFO L93 Difference]: Finished difference Result 1161 states and 2375 transitions. [2022-12-14 11:46:47,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-14 11:46:47,388 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 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 17 [2022-12-14 11:46:47,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:46:47,390 INFO L225 Difference]: With dead ends: 1161 [2022-12-14 11:46:47,390 INFO L226 Difference]: Without dead ends: 1161 [2022-12-14 11:46:47,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 93.1s TimeCoverageRelationStatistics Valid=1635, Invalid=2921, Unknown=0, NotChecked=0, Total=4556 [2022-12-14 11:46:47,391 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3136 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5319 mSolverCounterSat, 122 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3136 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 5319 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:46:47,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3136 Valid, 0 Invalid, 5454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 5319 Invalid, 13 Unknown, 0 Unchecked, 44.1s Time] [2022-12-14 11:46:47,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2022-12-14 11:46:47,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 125. [2022-12-14 11:46:47,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 122 states have (on average 1.7950819672131149) internal successors, (219), 124 states have internal predecessors, (219), 0 states have call successors, (0), 0 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 11:46:47,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 219 transitions. [2022-12-14 11:46:47,399 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 219 transitions. Word has length 17 [2022-12-14 11:46:47,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:46:47,399 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 219 transitions. [2022-12-14 11:46:47,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 11:46:47,399 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 219 transitions. [2022-12-14 11:46:47,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 11:46:47,399 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:46:47,400 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:46:47,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:46:47,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2022-12-14 11:46:47,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-14 11:46:48,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:46:48,002 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 11:46:48,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:48,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1232810645, now seen corresponding path program 1 times [2022-12-14 11:46:48,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:46:48,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1913281898] [2022-12-14 11:46:48,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:48,005 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 11:46:48,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:46:48,008 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -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 11:46:48,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64fe674-e5f9-4df1-b7e3-1134bb063941/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-12-14 11:46:48,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:48,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 11:46:48,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:46:48,589 INFO L321 Elim1Store]: treesize reduction 332, result has 0.3 percent of original size [2022-12-14 11:46:48,589 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 181 treesize of output 41 [2022-12-14 11:46:48,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:46:48,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:46:55,521 WARN L233 SmtUtils]: Spent 6.37s on a formula simplification. DAG size of input: 392 DAG size of output: 285 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 11:46:55,524 INFO L321 Elim1Store]: treesize reduction 397, result has 76.6 percent of original size [2022-12-14 11:46:55,524 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 176 treesize of output 1335