./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-three-array-sum.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_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/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_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/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_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/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 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 --- 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 07:17:48,288 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:17:48,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:17:48,306 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:17:48,306 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:17:48,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:17:48,308 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:17:48,309 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:17:48,310 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:17:48,310 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:17:48,311 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:17:48,312 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:17:48,312 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:17:48,312 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:17:48,313 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:17:48,314 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:17:48,314 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:17:48,315 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:17:48,316 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:17:48,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:17:48,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:17:48,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:17:48,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:17:48,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:17:48,326 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:17:48,326 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:17:48,326 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:17:48,327 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:17:48,327 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:17:48,328 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:17:48,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:17:48,328 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:17:48,329 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:17:48,329 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:17:48,330 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:17:48,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:17:48,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:17:48,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:17:48,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:17:48,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:17:48,332 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:17:48,333 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 07:17:48,346 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:17:48,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:17:48,347 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:17:48,347 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:17:48,347 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:17:48,347 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:17:48,348 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:17:48,348 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:17:48,348 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:17:48,348 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:17:48,348 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:17:48,348 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:17:48,348 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:17:48,349 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:17:48,349 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:17:48,349 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:17:48,349 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:17:48,349 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:17:48,350 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 07:17:48,350 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 07:17:48,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:17:48,350 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:17:48,350 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 07:17:48,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:17:48,351 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:17:48,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:17:48,351 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 07:17:48,351 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 07:17:48,351 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 07:17:48,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:17:48,352 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 07:17:48,352 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:17:48,352 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:17:48,352 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:17:48,352 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:17:48,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:17:48,353 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:17:48,353 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:17:48,353 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:17:48,353 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:17:48,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:17:48,353 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:17:48,354 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_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 [2022-12-14 07:17:48,530 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:17:48,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:17:48,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:17:48,554 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:17:48,554 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:17:48,555 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2022-12-14 07:17:51,150 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:17:51,310 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:17:51,310 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2022-12-14 07:17:51,315 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/data/6a563947a/4a0a6fe5f4ac4221bb7fa33a17f534a8/FLAGd2057b43f [2022-12-14 07:17:51,729 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/data/6a563947a/4a0a6fe5f4ac4221bb7fa33a17f534a8 [2022-12-14 07:17:51,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:17:51,734 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:17:51,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:17:51,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:17:51,739 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:17:51,740 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:17:51" (1/1) ... [2022-12-14 07:17:51,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a1b75e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:17:51, skipping insertion in model container [2022-12-14 07:17:51,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:17:51" (1/1) ... [2022-12-14 07:17:51,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:17:51,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:17:51,880 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:17:51,882 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:17:51,883 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:17:51,883 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:17:51,884 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:17:51,885 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:17:51,891 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_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c[2691,2704] [2022-12-14 07:17:51,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:17:51,908 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 07:17:51,909 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5ea737cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:17:51, skipping insertion in model container [2022-12-14 07:17:51,909 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:17:51,909 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 07:17:51,911 INFO L158 Benchmark]: Toolchain (without parser) took 176.61ms. Allocated memory is still 184.5MB. Free memory was 150.2MB in the beginning and 139.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 07:17:51,911 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 115.3MB. Free memory is still 92.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 07:17:51,911 INFO L158 Benchmark]: CACSL2BoogieTranslator took 174.30ms. Allocated memory is still 184.5MB. Free memory was 150.2MB in the beginning and 140.4MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 07:17:51,912 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 115.3MB. Free memory is still 92.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 174.30ms. Allocated memory is still 184.5MB. Free memory was 150.2MB in the beginning and 140.4MB in the end (delta: 9.8MB). 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_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/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_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/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_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/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 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 --- 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 07:17:53,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:17:53,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:17:53,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:17:53,467 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:17:53,469 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:17:53,471 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:17:53,474 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:17:53,476 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:17:53,478 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:17:53,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:17:53,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:17:53,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:17:53,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:17:53,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:17:53,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:17:53,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:17:53,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:17:53,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:17:53,495 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:17:53,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:17:53,499 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:17:53,501 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:17:53,502 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:17:53,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:17:53,509 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:17:53,510 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:17:53,511 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:17:53,512 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:17:53,513 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:17:53,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:17:53,515 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:17:53,516 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:17:53,517 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:17:53,518 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:17:53,518 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:17:53,519 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:17:53,519 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:17:53,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:17:53,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:17:53,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:17:53,521 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 07:17:53,552 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:17:53,552 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:17:53,553 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:17:53,553 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:17:53,554 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:17:53,554 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:17:53,554 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:17:53,554 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:17:53,554 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:17:53,554 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:17:53,555 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:17:53,555 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:17:53,555 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 07:17:53,556 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 07:17:53,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:17:53,556 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:17:53,556 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 07:17:53,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:17:53,557 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:17:53,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:17:53,557 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 07:17:53,557 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 07:17:53,557 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 07:17:53,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:17:53,557 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 07:17:53,558 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 07:17:53,558 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 07:17:53,558 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:17:53,558 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:17:53,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:17:53,559 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 07:17:53,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:17:53,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:17:53,559 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:17:53,559 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:17:53,559 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 07:17:53,560 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 07:17:53,560 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:17:53,560 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 07:17:53,560 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_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 [2022-12-14 07:17:53,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:17:53,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:17:53,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:17:53,799 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:17:53,799 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:17:53,800 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2022-12-14 07:17:56,352 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:17:56,496 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:17:56,497 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2022-12-14 07:17:56,502 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/data/8eb650178/ca153e772ee24c6e9a8db04ac0f2540c/FLAG100279399 [2022-12-14 07:17:56,903 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/data/8eb650178/ca153e772ee24c6e9a8db04ac0f2540c [2022-12-14 07:17:56,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:17:56,905 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:17:56,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:17:56,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:17:56,909 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:17:56,909 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:17:56" (1/1) ... [2022-12-14 07:17:56,910 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@298e70a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:17:56, skipping insertion in model container [2022-12-14 07:17:56,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:17:56" (1/1) ... [2022-12-14 07:17:56,915 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:17:56,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:17:57,038 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:17:57,040 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:17:57,041 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:17:57,041 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:17:57,042 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:17:57,042 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:17:57,047 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_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c[2691,2704] [2022-12-14 07:17:57,055 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:17:57,064 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 07:17:57,067 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:17:57,071 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:17:57,072 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:17:57,073 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:17:57,073 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:17:57,074 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:17:57,074 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:17:57,077 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_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c[2691,2704] [2022-12-14 07:17:57,079 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:17:57,083 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:17:57,094 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:17:57,095 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:17:57,096 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:17:57,096 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:17:57,096 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:17:57,097 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:17:57,100 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_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c[2691,2704] [2022-12-14 07:17:57,102 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:17:57,113 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:17:57,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:17:57 WrapperNode [2022-12-14 07:17:57,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:17:57,114 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:17:57,114 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:17:57,114 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:17:57,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:17:57" (1/1) ... [2022-12-14 07:17:57,127 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:17:57" (1/1) ... [2022-12-14 07:17:57,143 INFO L138 Inliner]: procedures = 28, calls = 44, calls flagged for inlining = 8, calls inlined = 12, statements flattened = 149 [2022-12-14 07:17:57,143 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:17:57,144 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:17:57,144 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:17:57,144 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:17:57,150 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:17:57" (1/1) ... [2022-12-14 07:17:57,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:17:57" (1/1) ... [2022-12-14 07:17:57,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:17:57" (1/1) ... [2022-12-14 07:17:57,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:17:57" (1/1) ... [2022-12-14 07:17:57,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:17:57" (1/1) ... [2022-12-14 07:17:57,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:17:57" (1/1) ... [2022-12-14 07:17:57,164 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:17:57" (1/1) ... [2022-12-14 07:17:57,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:17:57" (1/1) ... [2022-12-14 07:17:57,168 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:17:57,168 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:17:57,168 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:17:57,168 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:17:57,169 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:17:57" (1/1) ... [2022-12-14 07:17:57,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:17:57,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:17:57,192 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:17:57,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:17:57,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:17:57,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 07:17:57,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 07:17:57,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 07:17:57,222 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 07:17:57,222 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 07:17:57,222 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 07:17:57,222 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 07:17:57,223 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-14 07:17:57,223 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-14 07:17:57,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 07:17:57,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 07:17:57,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 07:17:57,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:17:57,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:17:57,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 07:17:57,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 07:17:57,225 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 07:17:57,328 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:17:57,330 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:17:57,848 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:17:57,888 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:17:57,888 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-14 07:17:57,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:17:57 BoogieIcfgContainer [2022-12-14 07:17:57,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:17:57,892 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:17:57,892 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:17:57,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:17:57,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:17:56" (1/3) ... [2022-12-14 07:17:57,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4086d61c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:17:57, skipping insertion in model container [2022-12-14 07:17:57,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:17:57" (2/3) ... [2022-12-14 07:17:57,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4086d61c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:17:57, skipping insertion in model container [2022-12-14 07:17:57,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:17:57" (3/3) ... [2022-12-14 07:17:57,896 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-sum.wvr.c [2022-12-14 07:17:57,912 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:17:57,913 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-12-14 07:17:57,913 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 07:17:57,986 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-14 07:17:58,013 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 07:17:58,025 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 251 places, 261 transitions, 546 flow [2022-12-14 07:17:58,028 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 251 places, 261 transitions, 546 flow [2022-12-14 07:17:58,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 261 transitions, 546 flow [2022-12-14 07:17:58,107 INFO L130 PetriNetUnfolder]: 20/258 cut-off events. [2022-12-14 07:17:58,107 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-14 07:17:58,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 258 events. 20/258 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 292 event pairs, 0 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 206. Up to 3 conditions per place. [2022-12-14 07:17:58,117 INFO L119 LiptonReduction]: Number of co-enabled transitions 3482 [2022-12-14 07:18:26,804 INFO L134 LiptonReduction]: Checked pairs total: 5932 [2022-12-14 07:18:26,804 INFO L136 LiptonReduction]: Total number of compositions: 280 [2022-12-14 07:18:26,810 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 69 places, 66 transitions, 156 flow [2022-12-14 07:18:26,884 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2304 states, 1852 states have (on average 4.563174946004319) internal successors, (8451), 2303 states have internal predecessors, (8451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:18:26,897 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:18:26,902 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;@19aa1dd5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:18:26,902 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2022-12-14 07:18:26,907 INFO L276 IsEmpty]: Start isEmpty. Operand has 2304 states, 1852 states have (on average 4.563174946004319) internal successors, (8451), 2303 states have internal predecessors, (8451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:18:26,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 07:18:26,910 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:18:26,911 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 07:18:26,911 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-14 07:18:26,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:18:26,915 INFO L85 PathProgramCache]: Analyzing trace with hash 31625, now seen corresponding path program 1 times [2022-12-14 07:18:26,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:18:26,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745191534] [2022-12-14 07:18:26,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:18:26,924 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 07:18:26,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:18:26,926 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:18:26,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:18:27,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:18:27,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:18:27,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:18:27,155 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 07:18:27,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 07:18:27,181 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 07:18:27,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:18:27,182 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:18:27,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745191534] [2022-12-14 07:18:27,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745191534] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:18:27,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:18:27,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:18:27,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158661694] [2022-12-14 07:18:27,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:18:27,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:18:27,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:18:27,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:18:27,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:18:27,213 INFO L87 Difference]: Start difference. First operand has 2304 states, 1852 states have (on average 4.563174946004319) internal successors, (8451), 2303 states have internal predecessors, (8451), 0 states have call successors, (0), 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 07:18:27,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:18:27,514 INFO L93 Difference]: Finished difference Result 2300 states and 8447 transitions. [2022-12-14 07:18:27,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:18:27,516 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 07:18:27,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:18:27,545 INFO L225 Difference]: With dead ends: 2300 [2022-12-14 07:18:27,546 INFO L226 Difference]: Without dead ends: 2300 [2022-12-14 07:18:27,546 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 07:18:27,550 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:18:27,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 3 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:18:27,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2022-12-14 07:18:27,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 2300. [2022-12-14 07:18:27,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 1852 states have (on average 4.561015118790497) internal successors, (8447), 2299 states have internal predecessors, (8447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:18:27,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 8447 transitions. [2022-12-14 07:18:27,671 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 8447 transitions. Word has length 2 [2022-12-14 07:18:27,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:18:27,671 INFO L495 AbstractCegarLoop]: Abstraction has 2300 states and 8447 transitions. [2022-12-14 07:18:27,671 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 07:18:27,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 8447 transitions. [2022-12-14 07:18:27,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 07:18:27,672 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:18:27,672 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 07:18:27,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:18:27,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:18:27,873 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-14 07:18:27,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:18:27,873 INFO L85 PathProgramCache]: Analyzing trace with hash 31626, now seen corresponding path program 1 times [2022-12-14 07:18:27,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:18:27,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070379150] [2022-12-14 07:18:27,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:18:27,874 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 07:18:27,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:18:27,875 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:18:27,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:18:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:18:27,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:18:27,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:18:28,058 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:18:28,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:18:28,082 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 07:18:28,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:18:28,082 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:18:28,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070379150] [2022-12-14 07:18:28,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070379150] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:18:28,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:18:28,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:18:28,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505010368] [2022-12-14 07:18:28,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:18:28,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:18:28,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:18:28,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:18:28,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:18:28,085 INFO L87 Difference]: Start difference. First operand 2300 states and 8447 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 07:18:28,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:18:28,621 INFO L93 Difference]: Finished difference Result 4596 states and 16890 transitions. [2022-12-14 07:18:28,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:18:28,622 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 07:18:28,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:18:28,658 INFO L225 Difference]: With dead ends: 4596 [2022-12-14 07:18:28,658 INFO L226 Difference]: Without dead ends: 4596 [2022-12-14 07:18:28,658 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 07:18:28,659 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 49 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:18:28,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 6 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:18:28,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4596 states. [2022-12-14 07:18:28,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4596 to 2303. [2022-12-14 07:18:28,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 1855 states have (on average 4.557951482479784) internal successors, (8455), 2302 states have internal predecessors, (8455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:18:28,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 8455 transitions. [2022-12-14 07:18:28,799 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 8455 transitions. Word has length 2 [2022-12-14 07:18:28,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:18:28,799 INFO L495 AbstractCegarLoop]: Abstraction has 2303 states and 8455 transitions. [2022-12-14 07:18:28,799 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 07:18:28,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 8455 transitions. [2022-12-14 07:18:28,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 07:18:28,800 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:18:28,800 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 07:18:28,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:18:29,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:18:29,004 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-14 07:18:29,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:18:29,005 INFO L85 PathProgramCache]: Analyzing trace with hash 985806, now seen corresponding path program 1 times [2022-12-14 07:18:29,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:18:29,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2098343889] [2022-12-14 07:18:29,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:18:29,006 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 07:18:29,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:18:29,007 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:18:29,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:18:29,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:18:29,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 07:18:29,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:18:29,257 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:18:29,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:18:29,332 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 07:18:29,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:18:29,560 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 07:18:29,560 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:18:29,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2098343889] [2022-12-14 07:18:29,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2098343889] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:18:29,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [159252035] [2022-12-14 07:18:29,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:18:29,561 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:18:29,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:18:29,562 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:18:29,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-12-14 07:18:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:18:29,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 07:18:29,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:18:29,773 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:18:29,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:18:29,801 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 07:18:29,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:18:29,863 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 07:18:29,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [159252035] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:18:29,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325823455] [2022-12-14 07:18:29,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:18:29,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:18:29,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:18:29,865 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:18:29,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 07:18:29,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:18:29,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 07:18:29,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:18:30,025 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:18:30,026 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:18:30,079 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 07:18:30,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:18:30,204 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 07:18:30,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325823455] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:18:30,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:18:30,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-12-14 07:18:30,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915645837] [2022-12-14 07:18:30,205 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:18:30,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 07:18:30,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:18:30,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 07:18:30,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:18:30,206 INFO L87 Difference]: Start difference. First operand 2303 states and 8455 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 07:18:33,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:18:33,435 INFO L93 Difference]: Finished difference Result 9191 states and 33784 transitions. [2022-12-14 07:18:33,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:18:33,436 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 07:18:33,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:18:33,501 INFO L225 Difference]: With dead ends: 9191 [2022-12-14 07:18:33,501 INFO L226 Difference]: Without dead ends: 9191 [2022-12-14 07:18:33,502 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 07:18:33,503 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 585 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:18:33,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 18 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-12-14 07:18:33,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9191 states. [2022-12-14 07:18:33,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9191 to 2312. [2022-12-14 07:18:33,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2312 states, 1864 states have (on average 4.54881974248927) internal successors, (8479), 2311 states have internal predecessors, (8479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:18:33,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 8479 transitions. [2022-12-14 07:18:33,668 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 8479 transitions. Word has length 3 [2022-12-14 07:18:33,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:18:33,669 INFO L495 AbstractCegarLoop]: Abstraction has 2312 states and 8479 transitions. [2022-12-14 07:18:33,669 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 07:18:33,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 8479 transitions. [2022-12-14 07:18:33,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 07:18:33,669 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:18:33,669 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 07:18:33,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2022-12-14 07:18:33,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:18:34,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 07:18:34,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:18:34,273 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-14 07:18:34,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:18:34,274 INFO L85 PathProgramCache]: Analyzing trace with hash 30628968, now seen corresponding path program 1 times [2022-12-14 07:18:34,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:18:34,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1863673083] [2022-12-14 07:18:34,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:18:34,276 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 07:18:34,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:18:34,276 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:18:34,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:18:34,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:18:34,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 07:18:34,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:18:34,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:18:34,434 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-12-14 07:18:34,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-12-14 07:18:34,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:18:34,715 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 07:18:34,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2022-12-14 07:18:34,979 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-12-14 07:18:34,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 76 [2022-12-14 07:18:35,315 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 07:18:35,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:18:35,316 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:18:35,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1863673083] [2022-12-14 07:18:35,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1863673083] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:18:35,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:18:35,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:18:35,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091293356] [2022-12-14 07:18:35,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:18:35,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:18:35,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:18:35,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:18:35,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:18:35,317 INFO L87 Difference]: Start difference. First operand 2312 states and 8479 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:18:35,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:18:35,665 INFO L93 Difference]: Finished difference Result 1879 states and 6674 transitions. [2022-12-14 07:18:35,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:18:35,666 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 07:18:35,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:18:35,672 INFO L225 Difference]: With dead ends: 1879 [2022-12-14 07:18:35,673 INFO L226 Difference]: Without dead ends: 1879 [2022-12-14 07:18:35,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:18:35,674 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 106 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:18:35,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 3 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:18:35,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2022-12-14 07:18:35,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1879. [2022-12-14 07:18:35,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1537 states have (on average 4.342225113858166) internal successors, (6674), 1878 states have internal predecessors, (6674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:18:35,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 6674 transitions. [2022-12-14 07:18:35,708 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 6674 transitions. Word has length 4 [2022-12-14 07:18:35,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:18:35,708 INFO L495 AbstractCegarLoop]: Abstraction has 1879 states and 6674 transitions. [2022-12-14 07:18:35,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:18:35,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 6674 transitions. [2022-12-14 07:18:35,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 07:18:35,709 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:18:35,709 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 07:18:35,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:18:35,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:18:35,910 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-14 07:18:35,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:18:35,912 INFO L85 PathProgramCache]: Analyzing trace with hash 30628969, now seen corresponding path program 1 times [2022-12-14 07:18:35,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:18:35,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213598062] [2022-12-14 07:18:35,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:18:35,914 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 07:18:35,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:18:35,917 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:18:35,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:18:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:18:36,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 07:18:36,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:18:36,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:18:36,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:18:36,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:18:36,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:18:36,135 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-14 07:18:36,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-12-14 07:18:36,161 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 07:18:36,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-14 07:18:36,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:18:36,215 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 07:18:36,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:18:36,237 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 07:18:36,261 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 07:18:36,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:18:36,261 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:18:36,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213598062] [2022-12-14 07:18:36,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213598062] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:18:36,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:18:36,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:18:36,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16950657] [2022-12-14 07:18:36,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:18:36,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:18:36,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:18:36,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:18:36,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:18:36,263 INFO L87 Difference]: Start difference. First operand 1879 states and 6674 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:18:36,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:18:36,496 INFO L93 Difference]: Finished difference Result 1446 states and 4869 transitions. [2022-12-14 07:18:36,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:18:36,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 07:18:36,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:18:36,501 INFO L225 Difference]: With dead ends: 1446 [2022-12-14 07:18:36,502 INFO L226 Difference]: Without dead ends: 1446 [2022-12-14 07:18:36,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 07:18:36,502 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:18:36,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 3 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:18:36,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2022-12-14 07:18:36,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 1446. [2022-12-14 07:18:36,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1210 states have (on average 4.0239669421487605) internal successors, (4869), 1445 states have internal predecessors, (4869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:18:36,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4869 transitions. [2022-12-14 07:18:36,525 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4869 transitions. Word has length 4 [2022-12-14 07:18:36,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:18:36,525 INFO L495 AbstractCegarLoop]: Abstraction has 1446 states and 4869 transitions. [2022-12-14 07:18:36,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:18:36,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4869 transitions. [2022-12-14 07:18:36,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:18:36,525 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:18:36,525 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 07:18:36,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:18:36,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:18:36,726 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-14 07:18:36,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:18:36,726 INFO L85 PathProgramCache]: Analyzing trace with hash -691262326, now seen corresponding path program 2 times [2022-12-14 07:18:36,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:18:36,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556461316] [2022-12-14 07:18:36,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:18:36,727 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 07:18:36,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:18:36,727 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:18:36,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:18:36,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:18:36,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:18:36,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 07:18:36,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:18:36,885 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:18:36,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:18:36,983 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 07:18:36,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:18:37,527 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 07:18:37,527 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:18:37,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556461316] [2022-12-14 07:18:37,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556461316] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:18:37,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2119497140] [2022-12-14 07:18:37,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:18:37,527 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:18:37,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:18:37,528 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:18:37,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-12-14 07:18:37,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:18:37,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:18:37,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 07:18:37,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:18:37,783 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:18:37,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:18:37,875 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 07:18:37,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:18:38,580 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 07:18:38,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2119497140] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:18:38,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702834967] [2022-12-14 07:18:38,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:18:38,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:18:38,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:18:38,582 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:18:38,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 07:18:38,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:18:38,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:18:38,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 07:18:38,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:18:38,750 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:18:38,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:18:38,808 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 07:18:38,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:18:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:18:38,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702834967] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:18:38,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:18:38,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-12-14 07:18:38,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017691504] [2022-12-14 07:18:38,937 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:18:38,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 07:18:38,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:18:38,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 07:18:38,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-12-14 07:18:38,939 INFO L87 Difference]: Start difference. First operand 1446 states and 4869 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:18:41,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:18:44,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:18:46,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:18:48,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:18:49,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:18:53,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:18:55,383 WARN L539 Checker$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 07:18:57,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:18:58,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:19:01,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:19:05,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:19:10,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:19:10,140 INFO L93 Difference]: Finished difference Result 11452 states and 38747 transitions. [2022-12-14 07:19:10,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 07:19:10,141 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 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 07:19:10,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:19:10,176 INFO L225 Difference]: With dead ends: 11452 [2022-12-14 07:19:10,176 INFO L226 Difference]: Without dead ends: 11452 [2022-12-14 07:19:10,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=197, Invalid=355, Unknown=0, NotChecked=0, Total=552 [2022-12-14 07:19:10,176 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1487 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 1667 mSolverCounterSat, 123 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1487 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1667 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:19:10,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1487 Valid, 105 Invalid, 1793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1667 Invalid, 3 Unknown, 0 Unchecked, 29.3s Time] [2022-12-14 07:19:10,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11452 states. [2022-12-14 07:19:10,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11452 to 1462. [2022-12-14 07:19:10,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1226 states have (on average 3.99836867862969) internal successors, (4902), 1461 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:19:10,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 4902 transitions. [2022-12-14 07:19:10,274 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 4902 transitions. Word has length 6 [2022-12-14 07:19:10,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:19:10,275 INFO L495 AbstractCegarLoop]: Abstraction has 1462 states and 4902 transitions. [2022-12-14 07:19:10,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:19:10,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 4902 transitions. [2022-12-14 07:19:10,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:19:10,275 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:19:10,275 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 07:19:10,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-14 07:19:10,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-12-14 07:19:10,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 07:19:10,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:19:10,879 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-14 07:19:10,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:19:10,880 INFO L85 PathProgramCache]: Analyzing trace with hash -630311864, now seen corresponding path program 1 times [2022-12-14 07:19:10,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:19:10,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [615070264] [2022-12-14 07:19:10,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:10,882 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 07:19:10,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:19:10,884 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:19:10,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:19:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:11,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 07:19:11,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:19:11,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:19:11,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:19:11,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:19:11,077 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-14 07:19:11,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-12-14 07:19:11,090 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 07:19:11,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:19:11,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 07:19:11,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:19:11,176 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 07:19:11,211 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 07:19:11,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:19:11,211 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:19:11,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [615070264] [2022-12-14 07:19:11,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [615070264] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:19:11,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:19:11,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:19:11,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849602762] [2022-12-14 07:19:11,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:19:11,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:19:11,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:19:11,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:19:11,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:19:11,212 INFO L87 Difference]: Start difference. First operand 1462 states and 4902 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:19:11,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:19:11,430 INFO L93 Difference]: Finished difference Result 1400 states and 4715 transitions. [2022-12-14 07:19:11,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:19:11,431 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 07:19:11,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:19:11,434 INFO L225 Difference]: With dead ends: 1400 [2022-12-14 07:19:11,434 INFO L226 Difference]: Without dead ends: 1400 [2022-12-14 07:19:11,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 07:19:11,435 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:19:11,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 3 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:19:11,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2022-12-14 07:19:11,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1400. [2022-12-14 07:19:11,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1190 states have (on average 3.96218487394958) internal successors, (4715), 1399 states have internal predecessors, (4715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:19:11,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 4715 transitions. [2022-12-14 07:19:11,470 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 4715 transitions. Word has length 6 [2022-12-14 07:19:11,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:19:11,470 INFO L495 AbstractCegarLoop]: Abstraction has 1400 states and 4715 transitions. [2022-12-14 07:19:11,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:19:11,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 4715 transitions. [2022-12-14 07:19:11,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:19:11,471 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:19:11,471 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 07:19:11,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:19:11,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:19:11,672 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-14 07:19:11,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:19:11,673 INFO L85 PathProgramCache]: Analyzing trace with hash -630311863, now seen corresponding path program 1 times [2022-12-14 07:19:11,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:19:11,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264783010] [2022-12-14 07:19:11,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:11,674 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 07:19:11,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:19:11,676 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:19:11,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:19:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:11,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 07:19:11,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:19:11,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:19:11,830 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-12-14 07:19:11,830 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 4 case distinctions, treesize of input 29 treesize of output 48 [2022-12-14 07:19:11,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:19:11,994 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-12-14 07:19:11,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2022-12-14 07:19:18,145 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-12-14 07:19:18,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-12-14 07:19:20,230 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 07:19:20,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:19:20,230 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:19:20,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264783010] [2022-12-14 07:19:20,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264783010] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:19:20,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:19:20,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:19:20,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050203110] [2022-12-14 07:19:20,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:19:20,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:19:20,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:19:20,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:19:20,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=9, Unknown=2, NotChecked=0, Total=20 [2022-12-14 07:19:20,231 INFO L87 Difference]: Start difference. First operand 1400 states and 4715 transitions. Second operand has 5 states, 4 states have (on average 1.5) 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 07:19:22,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:19:22,621 INFO L93 Difference]: Finished difference Result 1338 states and 4528 transitions. [2022-12-14 07:19:22,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:19:22,622 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 07:19:22,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:19:22,625 INFO L225 Difference]: With dead ends: 1338 [2022-12-14 07:19:22,625 INFO L226 Difference]: Without dead ends: 1338 [2022-12-14 07:19:22,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=14, Invalid=14, Unknown=2, NotChecked=0, Total=30 [2022-12-14 07:19:22,625 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 94 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:19:22,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 3 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:19:22,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2022-12-14 07:19:22,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1338. [2022-12-14 07:19:22,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1154 states have (on average 3.9237435008665513) internal successors, (4528), 1337 states have internal predecessors, (4528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:19:22,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 4528 transitions. [2022-12-14 07:19:22,644 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 4528 transitions. Word has length 6 [2022-12-14 07:19:22,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:19:22,644 INFO L495 AbstractCegarLoop]: Abstraction has 1338 states and 4528 transitions. [2022-12-14 07:19:22,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) 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 07:19:22,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 4528 transitions. [2022-12-14 07:19:22,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 07:19:22,644 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:19:22,644 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:19:22,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-12-14 07:19:22,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:19:22,846 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-14 07:19:22,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:19:22,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1935160924, now seen corresponding path program 1 times [2022-12-14 07:19:22,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:19:22,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257792968] [2022-12-14 07:19:22,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:22,848 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 07:19:22,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:19:22,851 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:19:22,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:19:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:22,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:19:22,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:19:23,016 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 07:19:23,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:19:23,016 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:19:23,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257792968] [2022-12-14 07:19:23,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257792968] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:19:23,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:19:23,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:19:23,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524115785] [2022-12-14 07:19:23,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:19:23,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:19:23,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:19:23,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:19:23,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:19:23,017 INFO L87 Difference]: Start difference. First operand 1338 states and 4528 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:19:23,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:19:23,592 INFO L93 Difference]: Finished difference Result 1913 states and 6305 transitions. [2022-12-14 07:19:23,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:19:23,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 07:19:23,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:19:23,597 INFO L225 Difference]: With dead ends: 1913 [2022-12-14 07:19:23,597 INFO L226 Difference]: Without dead ends: 1913 [2022-12-14 07:19:23,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:19:23,598 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 100 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:19:23,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 13 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:19:23,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2022-12-14 07:19:23,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1633. [2022-12-14 07:19:23,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1633 states, 1449 states have (on average 3.8281573498964803) internal successors, (5547), 1632 states have internal predecessors, (5547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:19:23,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1633 states to 1633 states and 5547 transitions. [2022-12-14 07:19:23,632 INFO L78 Accepts]: Start accepts. Automaton has 1633 states and 5547 transitions. Word has length 7 [2022-12-14 07:19:23,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:19:23,632 INFO L495 AbstractCegarLoop]: Abstraction has 1633 states and 5547 transitions. [2022-12-14 07:19:23,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:19:23,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1633 states and 5547 transitions. [2022-12-14 07:19:23,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 07:19:23,633 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:19:23,633 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:19:23,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:19:23,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:19:23,833 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-14 07:19:23,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:19:23,834 INFO L85 PathProgramCache]: Analyzing trace with hash -139288586, now seen corresponding path program 1 times [2022-12-14 07:19:23,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:19:23,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1350806647] [2022-12-14 07:19:23,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:23,834 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 07:19:23,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:19:23,835 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:19:23,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-14 07:19:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:23,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 07:19:23,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:19:23,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:19:24,017 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-12-14 07:19:24,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-12-14 07:19:24,030 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 250 treesize of output 242 [2022-12-14 07:19:24,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:19:24,091 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 07:19:24,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:19:24,118 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 07:19:24,171 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 07:19:24,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:19:24,172 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:19:24,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1350806647] [2022-12-14 07:19:24,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1350806647] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:19:24,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:19:24,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:19:24,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198493796] [2022-12-14 07:19:24,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:19:24,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:19:24,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:19:24,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:19:24,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:19:24,173 INFO L87 Difference]: Start difference. First operand 1633 states and 5547 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:19:24,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:19:24,401 INFO L93 Difference]: Finished difference Result 1537 states and 5264 transitions. [2022-12-14 07:19:24,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:19:24,402 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 07:19:24,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:19:24,405 INFO L225 Difference]: With dead ends: 1537 [2022-12-14 07:19:24,406 INFO L226 Difference]: Without dead ends: 1537 [2022-12-14 07:19:24,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:19:24,406 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 131 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:19:24,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 3 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:19:24,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2022-12-14 07:19:24,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1537. [2022-12-14 07:19:24,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1391 states have (on average 3.7843278217109995) internal successors, (5264), 1536 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:19:24,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 5264 transitions. [2022-12-14 07:19:24,428 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 5264 transitions. Word has length 8 [2022-12-14 07:19:24,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:19:24,429 INFO L495 AbstractCegarLoop]: Abstraction has 1537 states and 5264 transitions. [2022-12-14 07:19:24,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:19:24,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 5264 transitions. [2022-12-14 07:19:24,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 07:19:24,429 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:19:24,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:19:24,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-14 07:19:24,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:19:24,630 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-14 07:19:24,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:19:24,631 INFO L85 PathProgramCache]: Analyzing trace with hash -139288584, now seen corresponding path program 1 times [2022-12-14 07:19:24,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:19:24,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134158802] [2022-12-14 07:19:24,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:24,631 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 07:19:24,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:19:24,632 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:19:24,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-14 07:19:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:24,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 07:19:24,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:19:24,782 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-14 07:19:24,783 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-12-14 07:19:24,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:19:24,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 07:19:24,847 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 07:19:24,848 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 07:19:24,881 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 07:19:24,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:19:24,882 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:19:24,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134158802] [2022-12-14 07:19:24,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134158802] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:19:24,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:19:24,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:19:24,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007797234] [2022-12-14 07:19:24,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:19:24,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:19:24,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:19:24,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:19:24,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:19:24,883 INFO L87 Difference]: Start difference. First operand 1537 states and 5264 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 07:19:25,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:19:25,143 INFO L93 Difference]: Finished difference Result 1441 states and 4981 transitions. [2022-12-14 07:19:25,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:19:25,144 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 07:19:25,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:19:25,148 INFO L225 Difference]: With dead ends: 1441 [2022-12-14 07:19:25,148 INFO L226 Difference]: Without dead ends: 1441 [2022-12-14 07:19:25,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 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 07:19:25,148 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 82 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:19:25,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 3 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:19:25,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2022-12-14 07:19:25,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 1441. [2022-12-14 07:19:25,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1333 states have (on average 3.7366841710427607) internal successors, (4981), 1440 states have internal predecessors, (4981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:19:25,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 4981 transitions. [2022-12-14 07:19:25,168 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 4981 transitions. Word has length 8 [2022-12-14 07:19:25,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:19:25,168 INFO L495 AbstractCegarLoop]: Abstraction has 1441 states and 4981 transitions. [2022-12-14 07:19:25,168 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 07:19:25,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 4981 transitions. [2022-12-14 07:19:25,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 07:19:25,169 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:19:25,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:19:25,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-12-14 07:19:25,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:19:25,371 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-14 07:19:25,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:19:25,372 INFO L85 PathProgramCache]: Analyzing trace with hash -22986516, now seen corresponding path program 1 times [2022-12-14 07:19:25,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:19:25,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1489814030] [2022-12-14 07:19:25,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:25,374 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 07:19:25,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:19:25,376 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:19:25,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:19:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:25,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:19:25,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:19:25,549 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 07:19:25,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:19:25,549 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:19:25,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1489814030] [2022-12-14 07:19:25,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1489814030] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:19:25,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:19:25,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:19:25,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169432102] [2022-12-14 07:19:25,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:19:25,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:19:25,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:19:25,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:19:25,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:19:25,551 INFO L87 Difference]: Start difference. First operand 1441 states and 4981 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:19:26,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:19:26,011 INFO L93 Difference]: Finished difference Result 1367 states and 4579 transitions. [2022-12-14 07:19:26,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:19:26,011 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 07:19:26,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:19:26,017 INFO L225 Difference]: With dead ends: 1367 [2022-12-14 07:19:26,017 INFO L226 Difference]: Without dead ends: 1367 [2022-12-14 07:19:26,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:19:26,018 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 58 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:19:26,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 13 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:19:26,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2022-12-14 07:19:26,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1327. [2022-12-14 07:19:26,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1219 states have (on average 3.694011484823626) internal successors, (4503), 1326 states have internal predecessors, (4503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:19:26,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 4503 transitions. [2022-12-14 07:19:26,042 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 4503 transitions. Word has length 9 [2022-12-14 07:19:26,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:19:26,042 INFO L495 AbstractCegarLoop]: Abstraction has 1327 states and 4503 transitions. [2022-12-14 07:19:26,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:19:26,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 4503 transitions. [2022-12-14 07:19:26,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 07:19:26,043 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:19:26,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:19:26,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-12-14 07:19:26,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:19:26,243 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-14 07:19:26,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:19:26,244 INFO L85 PathProgramCache]: Analyzing trace with hash -395578187, now seen corresponding path program 1 times [2022-12-14 07:19:26,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:19:26,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1166860582] [2022-12-14 07:19:26,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:26,244 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:19:26,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:19:26,245 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:19:26,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-14 07:19:26,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:26,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 07:19:26,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:19:26,417 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 07:19:26,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 07:19:26,439 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:19:26,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 07:19:26,455 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 07:19:26,455 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 07:19:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 07:19:26,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:19:26,468 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:19:26,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1166860582] [2022-12-14 07:19:26,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1166860582] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:19:26,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:19:26,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:19:26,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748496882] [2022-12-14 07:19:26,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:19:26,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:19:26,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:19:26,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:19:26,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:19:26,470 INFO L87 Difference]: Start difference. First operand 1327 states and 4503 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 07:19:26,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:19:26,668 INFO L93 Difference]: Finished difference Result 1089 states and 3661 transitions. [2022-12-14 07:19:26,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:19:26,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 10 [2022-12-14 07:19:26,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:19:26,671 INFO L225 Difference]: With dead ends: 1089 [2022-12-14 07:19:26,671 INFO L226 Difference]: Without dead ends: 1089 [2022-12-14 07:19:26,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 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 07:19:26,672 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 74 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:19:26,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 3 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:19:26,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2022-12-14 07:19:26,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 1089. [2022-12-14 07:19:26,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 1014 states have (on average 3.6104536489151875) internal successors, (3661), 1088 states have internal predecessors, (3661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:19:26,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 3661 transitions. [2022-12-14 07:19:26,690 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 3661 transitions. Word has length 10 [2022-12-14 07:19:26,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:19:26,690 INFO L495 AbstractCegarLoop]: Abstraction has 1089 states and 3661 transitions. [2022-12-14 07:19:26,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 07:19:26,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 3661 transitions. [2022-12-14 07:19:26,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 07:19:26,691 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:19:26,691 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:19:26,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-14 07:19:26,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:19:26,893 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-14 07:19:26,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:19:26,894 INFO L85 PathProgramCache]: Analyzing trace with hash -395578059, now seen corresponding path program 1 times [2022-12-14 07:19:26,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:19:26,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649111571] [2022-12-14 07:19:26,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:26,896 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 07:19:26,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:19:26,899 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:19:26,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-14 07:19:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:27,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 07:19:27,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:19:27,135 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 07:19:27,145 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 07:19:27,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:19:27,190 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 07:19:27,202 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 07:19:27,202 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 07:19:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:19:27,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:19:27,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:19:27,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:19:27,643 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:19:27,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649111571] [2022-12-14 07:19:27,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649111571] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:19:27,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1197723845] [2022-12-14 07:19:27,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:27,643 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:19:27,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:19:27,644 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:19:27,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-12-14 07:19:27,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:27,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 07:19:27,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:19:27,955 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 07:19:27,962 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 07:19:27,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:19:27,987 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 07:19:28,003 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 07:19:28,003 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 07:19:28,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:19:28,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:19:28,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:19:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:19:28,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1197723845] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:19:28,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692326440] [2022-12-14 07:19:28,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:28,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:19:28,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:19:28,195 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:19:28,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 07:19:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:28,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 07:19:28,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:19:28,343 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 07:19:28,464 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-14 07:19:28,465 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 16 treesize of output 18 [2022-12-14 07:19:28,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:19:28,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:19:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:19:29,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692326440] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:19:29,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:19:29,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 7, 7] total 22 [2022-12-14 07:19:29,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719489176] [2022-12-14 07:19:29,299 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:19:29,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 07:19:29,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:19:29,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 07:19:29,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-12-14 07:19:29,300 INFO L87 Difference]: Start difference. First operand 1089 states and 3661 transitions. Second operand has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:19:54,049 WARN L233 SmtUtils]: Spent 24.16s on a formula simplification. DAG size of input: 48 DAG size of output: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:20:02,065 WARN L233 SmtUtils]: Spent 7.26s on a formula simplification. DAG size of input: 43 DAG size of output: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:20:32,746 WARN L233 SmtUtils]: Spent 26.72s on a formula simplification. DAG size of input: 54 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:20:39,044 WARN L233 SmtUtils]: Spent 5.80s on a formula simplification. DAG size of input: 49 DAG size of output: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:20:44,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:20:58,772 WARN L233 SmtUtils]: Spent 13.40s on a formula simplification. DAG size of input: 51 DAG size of output: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:21:16,066 WARN L233 SmtUtils]: Spent 16.65s on a formula simplification. DAG size of input: 52 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:21:45,450 WARN L233 SmtUtils]: Spent 29.28s on a formula simplification. DAG size of input: 60 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:21:49,825 WARN L539 Checker$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 07:22:03,244 WARN L233 SmtUtils]: Spent 10.93s on a formula simplification. DAG size of input: 58 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:22:04,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:22:07,507 WARN L539 Checker$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 07:22:09,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:22:12,955 WARN L539 Checker$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 07:22:15,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:22:17,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:22:19,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:22:21,908 WARN L539 Checker$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 07:22:23,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:22:25,443 WARN L539 Checker$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 07:22:27,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:22:30,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:22:32,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:22:34,057 WARN L539 Checker$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 07:22:36,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:22:38,566 WARN L539 Checker$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 07:22:40,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:22:44,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:22:47,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:22:49,565 WARN L539 Checker$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 07:22:51,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:22:53,697 WARN L539 Checker$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 07:22:55,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:22:57,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:22:59,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:23:01,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:23:01,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:23:01,817 INFO L93 Difference]: Finished difference Result 6541 states and 22405 transitions. [2022-12-14 07:23:01,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 07:23:01,820 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 07:23:01,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:23:01,834 INFO L225 Difference]: With dead ends: 6541 [2022-12-14 07:23:01,834 INFO L226 Difference]: Without dead ends: 6541 [2022-12-14 07:23:01,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 145.7s TimeCoverageRelationStatistics Valid=510, Invalid=1650, Unknown=2, NotChecked=0, Total=2162 [2022-12-14 07:23:01,835 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1519 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 80 mSolverCounterUnsat, 25 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 67.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1519 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 25 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.9s IncrementalHoareTripleChecker+Time [2022-12-14 07:23:01,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1519 Valid, 118 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1150 Invalid, 25 Unknown, 0 Unchecked, 67.9s Time] [2022-12-14 07:23:01,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6541 states. [2022-12-14 07:23:01,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6541 to 1438. [2022-12-14 07:23:01,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1363 states have (on average 3.9985326485693324) internal successors, (5450), 1437 states have internal predecessors, (5450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:23:01,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 5450 transitions. [2022-12-14 07:23:01,889 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 5450 transitions. Word has length 10 [2022-12-14 07:23:01,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:23:01,889 INFO L495 AbstractCegarLoop]: Abstraction has 1438 states and 5450 transitions. [2022-12-14 07:23:01,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:23:01,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 5450 transitions. [2022-12-14 07:23:01,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 07:23:01,890 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:23:01,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:23:01,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-14 07:23:02,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-14 07:23:02,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-12-14 07:23:02,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:23:02,492 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-14 07:23:02,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:23:02,493 INFO L85 PathProgramCache]: Analyzing trace with hash -395578058, now seen corresponding path program 1 times [2022-12-14 07:23:02,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:23:02,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220937] [2022-12-14 07:23:02,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:23:02,494 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 07:23:02,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:23:02,495 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:23:02,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:23:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:23:02,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 07:23:02,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:23:02,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 07:23:02,744 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:23:02,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 07:23:02,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 07:23:02,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:23:02,756 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:23:02,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220937] [2022-12-14 07:23:02,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220937] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:23:02,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:23:02,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:23:02,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456417490] [2022-12-14 07:23:02,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:23:02,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:23:02,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:23:02,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:23:02,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:23:02,757 INFO L87 Difference]: Start difference. First operand 1438 states and 5450 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:23:02,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:23:02,982 INFO L93 Difference]: Finished difference Result 1186 states and 4288 transitions. [2022-12-14 07:23:02,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:23:02,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 07:23:02,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:23:02,986 INFO L225 Difference]: With dead ends: 1186 [2022-12-14 07:23:02,986 INFO L226 Difference]: Without dead ends: 1186 [2022-12-14 07:23:02,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 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 07:23:02,986 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 69 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:23:02,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 3 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:23:02,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2022-12-14 07:23:02,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1186. [2022-12-14 07:23:03,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 1138 states have (on average 3.768014059753954) internal successors, (4288), 1185 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:23:03,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 4288 transitions. [2022-12-14 07:23:03,008 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 4288 transitions. Word has length 10 [2022-12-14 07:23:03,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:23:03,008 INFO L495 AbstractCegarLoop]: Abstraction has 1186 states and 4288 transitions. [2022-12-14 07:23:03,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:23:03,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 4288 transitions. [2022-12-14 07:23:03,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 07:23:03,009 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:23:03,009 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:23:03,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:23:03,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:23:03,210 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-14 07:23:03,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:23:03,212 INFO L85 PathProgramCache]: Analyzing trace with hash -395578186, now seen corresponding path program 1 times [2022-12-14 07:23:03,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:23:03,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1604817260] [2022-12-14 07:23:03,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:23:03,214 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 07:23:03,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:23:03,216 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:23:03,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-14 07:23:03,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:23:03,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 07:23:03,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:23:03,504 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:23:03,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:23:03,622 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 07:23:03,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 07:23:03,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:03,714 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 07:23:03,725 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 07:23:03,725 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 07:23:03,774 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-14 07:23:03,774 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 16 treesize of output 18 [2022-12-14 07:23:03,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:23:03,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:23:04,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:23:04,627 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:23:04,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1604817260] [2022-12-14 07:23:04,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1604817260] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:23:04,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [430279104] [2022-12-14 07:23:04,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:23:04,627 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:23:04,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:23:04,628 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:23:04,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-12-14 07:23:04,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:23:04,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 07:23:04,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:23:04,935 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:23:04,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:23:05,035 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 07:23:05,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 07:23:05,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 07:23:05,169 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 07:23:05,170 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 07:23:05,275 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2022-12-14 07:23:05,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-12-14 07:23:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:23:05,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:23:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:23:06,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [430279104] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:23:06,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496104675] [2022-12-14 07:23:06,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:23:06,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:23:06,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:23:06,791 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:23:06,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 07:23:06,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:23:06,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 07:23:06,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:23:06,996 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:23:06,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:23:07,084 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 07:23:07,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 07:23:07,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:07,150 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 07:23:07,161 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 07:23:07,161 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 07:23:07,192 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-14 07:23:07,192 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 16 treesize of output 18 [2022-12-14 07:23:07,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:23:07,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:23:13,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:23:13,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496104675] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:23:13,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:23:13,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 7, 7] total 24 [2022-12-14 07:23:13,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360054106] [2022-12-14 07:23:13,575 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:23:13,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 07:23:13,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:23:13,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 07:23:13,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-12-14 07:23:13,576 INFO L87 Difference]: Start difference. First operand 1186 states and 4288 transitions. Second operand has 26 states, 25 states have (on average 1.72) internal successors, (43), 25 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 07:23:21,191 WARN L233 SmtUtils]: Spent 5.04s on a formula simplification. DAG size of input: 51 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:23:46,639 WARN L233 SmtUtils]: Spent 8.80s on a formula simplification. DAG size of input: 67 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:24:00,248 WARN L233 SmtUtils]: Spent 6.27s on a formula simplification. DAG size of input: 55 DAG size of output: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:24:19,971 WARN L233 SmtUtils]: Spent 7.07s on a formula simplification. DAG size of input: 61 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:24:22,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:24:24,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:24:31,847 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 07:24:32,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:24:32,090 INFO L93 Difference]: Finished difference Result 6740 states and 23545 transitions. [2022-12-14 07:24:32,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 07:24:32,092 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.72) internal successors, (43), 25 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 10 [2022-12-14 07:24:32,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:24:32,108 INFO L225 Difference]: With dead ends: 6740 [2022-12-14 07:24:32,108 INFO L226 Difference]: Without dead ends: 6740 [2022-12-14 07:24:32,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 70.2s TimeCoverageRelationStatistics Valid=596, Invalid=1951, Unknown=3, NotChecked=0, Total=2550 [2022-12-14 07:24:32,109 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1642 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 185 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1642 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:24:32,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1642 Valid, 83 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 938 Invalid, 3 Unknown, 0 Unchecked, 16.5s Time] [2022-12-14 07:24:32,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6740 states. [2022-12-14 07:24:32,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6740 to 1609. [2022-12-14 07:24:32,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1561 states have (on average 3.746316463805253) internal successors, (5848), 1608 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:32,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 5848 transitions. [2022-12-14 07:24:32,203 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 5848 transitions. Word has length 10 [2022-12-14 07:24:32,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:24:32,204 INFO L495 AbstractCegarLoop]: Abstraction has 1609 states and 5848 transitions. [2022-12-14 07:24:32,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.72) internal successors, (43), 25 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 07:24:32,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 5848 transitions. [2022-12-14 07:24:32,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 07:24:32,204 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:24:32,204 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:24:32,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2022-12-14 07:24:32,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-12-14 07:24:32,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 07:24:32,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:24:32,807 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-14 07:24:32,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:24:32,808 INFO L85 PathProgramCache]: Analyzing trace with hash -607152914, now seen corresponding path program 1 times [2022-12-14 07:24:32,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:24:32,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376046055] [2022-12-14 07:24:32,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:24:32,809 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 07:24:32,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:24:32,812 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:24:32,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:24:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:24:32,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 07:24:32,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:24:32,940 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 07:24:32,954 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 07:24:32,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:24:32,954 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:24:32,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376046055] [2022-12-14 07:24:32,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376046055] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:24:32,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:24:32,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:24:32,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367874086] [2022-12-14 07:24:32,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:24:32,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:24:32,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:24:32,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:24:32,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:24:32,958 INFO L87 Difference]: Start difference. First operand 1609 states and 5848 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:33,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:24:33,182 INFO L93 Difference]: Finished difference Result 1225 states and 4410 transitions. [2022-12-14 07:24:33,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:24:33,182 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 07:24:33,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:24:33,189 INFO L225 Difference]: With dead ends: 1225 [2022-12-14 07:24:33,189 INFO L226 Difference]: Without dead ends: 1225 [2022-12-14 07:24:33,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 07:24:33,189 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 61 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:24:33,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 3 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:24:33,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2022-12-14 07:24:33,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1225. [2022-12-14 07:24:33,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1225 states, 1198 states have (on average 3.681135225375626) internal successors, (4410), 1224 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:33,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 4410 transitions. [2022-12-14 07:24:33,212 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 4410 transitions. Word has length 11 [2022-12-14 07:24:33,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:24:33,212 INFO L495 AbstractCegarLoop]: Abstraction has 1225 states and 4410 transitions. [2022-12-14 07:24:33,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:33,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 4410 transitions. [2022-12-14 07:24:33,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 07:24:33,213 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:24:33,213 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:24:33,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:24:33,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:24:33,415 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-14 07:24:33,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:24:33,416 INFO L85 PathProgramCache]: Analyzing trace with hash -607152913, now seen corresponding path program 1 times [2022-12-14 07:24:33,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:24:33,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462183037] [2022-12-14 07:24:33,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:24:33,418 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 07:24:33,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:24:33,421 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:24:33,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:24:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:24:33,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 07:24:33,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:24:33,591 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 07:24:33,668 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 07:24:33,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:24:33,668 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:24:33,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462183037] [2022-12-14 07:24:33,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462183037] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:24:33,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:24:33,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:24:33,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227320194] [2022-12-14 07:24:33,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:24:33,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:24:33,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:24:33,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:24:33,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:24:33,669 INFO L87 Difference]: Start difference. First operand 1225 states and 4410 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:34,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:24:34,029 INFO L93 Difference]: Finished difference Result 1797 states and 6684 transitions. [2022-12-14 07:24:34,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:24:34,029 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 07:24:34,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:24:34,033 INFO L225 Difference]: With dead ends: 1797 [2022-12-14 07:24:34,033 INFO L226 Difference]: Without dead ends: 1797 [2022-12-14 07:24:34,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:24:34,034 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 131 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:24:34,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 7 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:24:34,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2022-12-14 07:24:34,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 1415. [2022-12-14 07:24:34,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1415 states, 1388 states have (on average 3.951008645533141) internal successors, (5484), 1414 states have internal predecessors, (5484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:34,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1415 states to 1415 states and 5484 transitions. [2022-12-14 07:24:34,055 INFO L78 Accepts]: Start accepts. Automaton has 1415 states and 5484 transitions. Word has length 11 [2022-12-14 07:24:34,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:24:34,056 INFO L495 AbstractCegarLoop]: Abstraction has 1415 states and 5484 transitions. [2022-12-14 07:24:34,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:34,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1415 states and 5484 transitions. [2022-12-14 07:24:34,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 07:24:34,056 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:24:34,056 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-12-14 07:24:34,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:24:34,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:24:34,258 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-14 07:24:34,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:24:34,259 INFO L85 PathProgramCache]: Analyzing trace with hash -705116662, now seen corresponding path program 3 times [2022-12-14 07:24:34,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:24:34,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [240568472] [2022-12-14 07:24:34,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:24:34,260 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:24:34,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:24:34,263 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:24:34,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-12-14 07:24:34,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 07:24:34,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:24:34,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 07:24:34,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:24:34,584 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:24:34,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:24:34,988 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 07:24:34,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:24:37,650 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 07:24:37,651 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:24:37,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [240568472] [2022-12-14 07:24:37,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [240568472] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:24:37,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [814182188] [2022-12-14 07:24:37,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:24:37,651 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:24:37,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:24:37,652 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:24:37,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-12-14 07:24:38,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 07:24:38,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:24:38,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 07:24:38,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:24:38,372 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:24:38,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:24:38,628 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 07:24:38,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:24:42,033 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 07:24:42,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [814182188] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:24:42,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732472940] [2022-12-14 07:24:42,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:24:42,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:24:42,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:24:42,035 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:24:42,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 07:24:43,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 07:24:43,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:24:43,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 07:24:43,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:24:43,433 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:24:43,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:24:43,634 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 07:24:43,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:24:48,111 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 07:24:48,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732472940] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:24:48,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:24:48,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 42 [2022-12-14 07:24:48,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595241978] [2022-12-14 07:24:48,112 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:24:48,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 07:24:48,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:24:48,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 07:24:48,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=1386, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 07:24:48,114 INFO L87 Difference]: Start difference. First operand 1415 states and 5484 transitions. Second operand has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:25:01,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:25:03,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:25:05,028 WARN L539 Checker$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 07:25:07,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:25:09,056 WARN L539 Checker$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 07:25:11,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:25:13,061 WARN L539 Checker$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 07:25:15,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:25:17,098 WARN L539 Checker$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 07:25:19,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:25:21,104 WARN L539 Checker$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 07:25:22,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:25:24,810 WARN L539 Checker$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 07:25:26,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:25:28,816 WARN L539 Checker$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 07:25:30,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:25:32,821 WARN L539 Checker$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 07:25:34,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:25:36,827 WARN L539 Checker$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 07:25:38,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:25:40,832 WARN L539 Checker$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 07:25:42,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:25:44,838 WARN L539 Checker$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 07:25:47,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:25:49,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:25:52,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:25:54,809 WARN L539 Checker$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 07:25:56,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:25:59,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:26:00,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:26:02,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:26:04,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:26:06,897 WARN L539 Checker$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 07:26:08,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:26:10,903 WARN L539 Checker$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 07:26:12,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:26:14,981 WARN L539 Checker$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 07:26:16,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:26:18,987 WARN L539 Checker$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 07:26:20,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:26:22,993 WARN L539 Checker$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 07:26:24,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:26:26,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:26:28,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:26:30,936 WARN L539 Checker$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 07:26:32,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:26:34,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:26:36,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:26:38,948 WARN L539 Checker$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 07:26:40,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:26:42,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:26:44,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:26:46,723 WARN L539 Checker$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 07:26:50,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:26:58,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:26:58,883 INFO L93 Difference]: Finished difference Result 12523 states and 50259 transitions. [2022-12-14 07:26:58,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 07:26:58,885 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 0 states have call successors, (0), 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 07:26:58,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:26:58,918 INFO L225 Difference]: With dead ends: 12523 [2022-12-14 07:26:58,918 INFO L226 Difference]: Without dead ends: 12523 [2022-12-14 07:26:58,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=910, Invalid=2170, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 07:26:58,919 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 4516 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 4948 mSolverCounterSat, 923 mSolverCounterUnsat, 46 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 117.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4516 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 5917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 923 IncrementalHoareTripleChecker+Valid, 4948 IncrementalHoareTripleChecker+Invalid, 46 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 118.7s IncrementalHoareTripleChecker+Time [2022-12-14 07:26:58,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4516 Valid, 453 Invalid, 5917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [923 Valid, 4948 Invalid, 46 Unknown, 0 Unchecked, 118.7s Time] [2022-12-14 07:26:58,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12523 states. [2022-12-14 07:26:59,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12523 to 1447. [2022-12-14 07:26:59,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1447 states, 1420 states have (on average 3.9056338028169013) internal successors, (5546), 1446 states have internal predecessors, (5546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:26:59,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1447 states to 1447 states and 5546 transitions. [2022-12-14 07:26:59,016 INFO L78 Accepts]: Start accepts. Automaton has 1447 states and 5546 transitions. Word has length 12 [2022-12-14 07:26:59,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:26:59,016 INFO L495 AbstractCegarLoop]: Abstraction has 1447 states and 5546 transitions. [2022-12-14 07:26:59,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:26:59,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1447 states and 5546 transitions. [2022-12-14 07:26:59,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 07:26:59,017 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:26:59,017 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:26:59,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-12-14 07:26:59,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-14 07:26:59,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2022-12-14 07:26:59,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:26:59,621 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-14 07:26:59,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:26:59,622 INFO L85 PathProgramCache]: Analyzing trace with hash 2101528313, now seen corresponding path program 1 times [2022-12-14 07:26:59,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:26:59,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1025604464] [2022-12-14 07:26:59,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:26:59,624 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 07:26:59,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:26:59,626 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:26:59,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:26:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:26:59,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 07:26:59,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:26:59,909 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 07:26:59,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:27:00,071 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 07:27:00,072 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:27:00,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1025604464] [2022-12-14 07:27:00,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1025604464] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:27:00,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [770933098] [2022-12-14 07:27:00,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:27:00,072 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:27:00,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:27:00,073 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:27:00,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-12-14 07:27:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:27:00,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:27:00,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:27:00,347 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 07:27:00,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:27:00,382 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 07:27:00,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [770933098] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:27:00,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770615109] [2022-12-14 07:27:00,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:27:00,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:27:00,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:27:00,383 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:27:00,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-14 07:27:00,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:27:00,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 07:27:00,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:27:00,553 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 07:27:00,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:27:00,585 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 07:27:00,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770615109] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:27:00,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:27:00,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2022-12-14 07:27:00,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853669070] [2022-12-14 07:27:00,586 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:27:00,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 07:27:00,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:27:00,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 07:27:00,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-12-14 07:27:00,587 INFO L87 Difference]: Start difference. First operand 1447 states and 5546 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:27:02,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:27:02,378 INFO L93 Difference]: Finished difference Result 2090 states and 7715 transitions. [2022-12-14 07:27:02,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 07:27:02,379 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 07:27:02,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:27:02,387 INFO L225 Difference]: With dead ends: 2090 [2022-12-14 07:27:02,387 INFO L226 Difference]: Without dead ends: 2090 [2022-12-14 07:27:02,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-12-14 07:27:02,387 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 312 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:27:02,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 65 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 07:27:02,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2022-12-14 07:27:02,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 1605. [2022-12-14 07:27:02,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1578 states have (on average 3.9049429657794676) internal successors, (6162), 1604 states have internal predecessors, (6162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:27:02,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 6162 transitions. [2022-12-14 07:27:02,427 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 6162 transitions. Word has length 12 [2022-12-14 07:27:02,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:27:02,427 INFO L495 AbstractCegarLoop]: Abstraction has 1605 states and 6162 transitions. [2022-12-14 07:27:02,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:27:02,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 6162 transitions. [2022-12-14 07:27:02,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 07:27:02,428 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:27:02,428 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:27:02,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:27:02,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2022-12-14 07:27:02,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-14 07:27:03,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:27:03,031 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-14 07:27:03,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:27:03,032 INFO L85 PathProgramCache]: Analyzing trace with hash 2109656325, now seen corresponding path program 1 times [2022-12-14 07:27:03,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:27:03,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1109010817] [2022-12-14 07:27:03,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:27:03,033 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 07:27:03,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:27:03,036 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:27:03,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-12-14 07:27:03,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:27:03,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 07:27:03,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:27:03,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 07:27:03,292 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 07:27:03,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:27:03,335 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 07:27:03,347 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 07:27:03,348 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 07:27:03,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:27:03,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:27:03,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:27:03,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:27:03,888 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:27:03,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1109010817] [2022-12-14 07:27:03,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1109010817] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:27:03,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [79772885] [2022-12-14 07:27:03,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:27:03,889 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:27:03,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:27:03,889 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:27:03,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-12-14 07:27:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:27:04,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 07:27:04,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:27:04,262 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 07:27:04,270 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 07:27:04,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:27:04,291 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 07:27:04,304 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 07:27:04,305 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 07:27:04,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:27:04,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:27:04,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:27:04,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:27:04,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [79772885] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:27:04,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576958445] [2022-12-14 07:27:04,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:27:04,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:27:04,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:27:04,564 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:27:04,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-14 07:27:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:27:04,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 07:27:04,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:27:04,739 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 07:27:04,862 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-14 07:27:04,863 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 16 treesize of output 18 [2022-12-14 07:27:05,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:27:05,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:27:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:27:07,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576958445] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:27:07,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:27:07,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 7, 7] total 22 [2022-12-14 07:27:07,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904814398] [2022-12-14 07:27:07,763 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:27:07,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 07:27:07,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:27:07,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 07:27:07,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=410, Unknown=1, NotChecked=0, Total=506 [2022-12-14 07:27:07,763 INFO L87 Difference]: Start difference. First operand 1605 states and 6162 transitions. Second operand has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:27:23,147 WARN L233 SmtUtils]: Spent 10.73s on a formula simplification. DAG size of input: 48 DAG size of output: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:27:41,069 WARN L233 SmtUtils]: Spent 17.40s on a formula simplification. DAG size of input: 43 DAG size of output: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:28:17,606 WARN L233 SmtUtils]: Spent 25.06s on a formula simplification. DAG size of input: 54 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:28:35,607 WARN L233 SmtUtils]: Spent 14.90s on a formula simplification. DAG size of input: 49 DAG size of output: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:28:45,760 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 [1] [2022-12-14 07:28:47,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:28:50,345 WARN L539 Checker$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 07:29:14,936 WARN L233 SmtUtils]: Spent 21.51s on a formula simplification. DAG size of input: 60 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:29:17,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:29:34,738 WARN L233 SmtUtils]: Spent 15.16s on a formula simplification. DAG size of input: 58 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:29:36,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:29:39,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:29:41,588 WARN L539 Checker$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 07:29:44,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:29:46,401 WARN L539 Checker$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 07:29:48,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:29:50,854 WARN L539 Checker$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 07:29:52,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:29:55,558 WARN L539 Checker$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 07:29:57,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:29:59,859 WARN L539 Checker$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 07:30:01,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:30:23,721 WARN L233 SmtUtils]: Spent 21.68s on a formula simplification. DAG size of input: 51 DAG size of output: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:30:25,829 WARN L539 Checker$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 07:30:28,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:30:30,769 WARN L539 Checker$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 07:30:32,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:30:35,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:30:38,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:30:41,169 WARN L539 Checker$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 07:30:43,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:30:44,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:30:47,471 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 07:30:47,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:30:47,495 INFO L93 Difference]: Finished difference Result 4968 states and 19101 transitions. [2022-12-14 07:30:47,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 07:30:47,497 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 07:30:47,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:30:47,508 INFO L225 Difference]: With dead ends: 4968 [2022-12-14 07:30:47,508 INFO L226 Difference]: Without dead ends: 4968 [2022-12-14 07:30:47,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 159.9s TimeCoverageRelationStatistics Valid=545, Invalid=1710, Unknown=1, NotChecked=0, Total=2256 [2022-12-14 07:30:47,509 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1284 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 80 mSolverCounterUnsat, 23 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1284 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 23 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 63.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:30:47,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1284 Valid, 100 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 930 Invalid, 23 Unknown, 0 Unchecked, 63.1s Time] [2022-12-14 07:30:47,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4968 states. [2022-12-14 07:30:47,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4968 to 2032. [2022-12-14 07:30:47,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 2005 states have (on average 4.287780548628429) internal successors, (8597), 2031 states have internal predecessors, (8597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:30:47,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 8597 transitions. [2022-12-14 07:30:47,583 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 8597 transitions. Word has length 12 [2022-12-14 07:30:47,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:30:47,583 INFO L495 AbstractCegarLoop]: Abstraction has 2032 states and 8597 transitions. [2022-12-14 07:30:47,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:30:47,583 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 8597 transitions. [2022-12-14 07:30:47,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 07:30:47,584 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:30:47,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:30:47,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-12-14 07:30:47,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2022-12-14 07:30:47,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-12-14 07:30:48,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:30:48,186 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-14 07:30:48,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:30:48,187 INFO L85 PathProgramCache]: Analyzing trace with hash 2109656327, now seen corresponding path program 1 times [2022-12-14 07:30:48,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:30:48,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996849074] [2022-12-14 07:30:48,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:30:48,187 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 07:30:48,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:30:48,189 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:30:48,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-12-14 07:30:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:30:48,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:30:48,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:30:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:30:48,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:30:48,584 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 25 treesize of output 21 [2022-12-14 07:30:48,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:30:48,663 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:30:48,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996849074] [2022-12-14 07:30:48,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996849074] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:30:48,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1121246796] [2022-12-14 07:30:48,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:30:48,663 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:30:48,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:30:48,664 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:30:48,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-12-14 07:30:48,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:30:48,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 07:30:48,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:30:48,983 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 07:30:49,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:30:49,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:30:49,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:30:49,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1121246796] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:30:49,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180802293] [2022-12-14 07:30:49,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:30:49,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:30:49,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:30:49,471 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:30:49,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-14 07:30:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:30:49,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 07:30:49,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:30:49,714 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 07:30:49,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:30:49,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:30:50,081 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 07:30:50,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180802293] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 07:30:50,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2022-12-14 07:30:50,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5, 6, 6, 5] total 24 [2022-12-14 07:30:50,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528143077] [2022-12-14 07:30:50,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:30:50,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:30:50,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:30:50,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:30:50,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-12-14 07:30:50,082 INFO L87 Difference]: Start difference. First operand 2032 states and 8597 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 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 07:30:51,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:30:51,370 INFO L93 Difference]: Finished difference Result 2646 states and 10149 transitions. [2022-12-14 07:30:51,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:30:51,372 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 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 12 [2022-12-14 07:30:51,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:30:51,383 INFO L225 Difference]: With dead ends: 2646 [2022-12-14 07:30:51,383 INFO L226 Difference]: Without dead ends: 2646 [2022-12-14 07:30:51,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-12-14 07:30:51,383 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 164 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:30:51,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 21 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 07:30:51,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2022-12-14 07:30:51,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2032. [2022-12-14 07:30:51,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 2005 states have (on average 4.129177057356609) internal successors, (8279), 2031 states have internal predecessors, (8279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:30:51,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 8279 transitions. [2022-12-14 07:30:51,414 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 8279 transitions. Word has length 12 [2022-12-14 07:30:51,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:30:51,414 INFO L495 AbstractCegarLoop]: Abstraction has 2032 states and 8279 transitions. [2022-12-14 07:30:51,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 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 07:30:51,414 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 8279 transitions. [2022-12-14 07:30:51,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 07:30:51,414 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:30:51,414 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:30:51,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-12-14 07:30:51,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-12-14 07:30:51,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-14 07:30:52,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:30:52,018 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-14 07:30:52,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:30:52,019 INFO L85 PathProgramCache]: Analyzing trace with hash 2109656329, now seen corresponding path program 1 times [2022-12-14 07:30:52,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:30:52,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674301456] [2022-12-14 07:30:52,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:30:52,020 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 07:30:52,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:30:52,023 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:30:52,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-12-14 07:30:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:30:52,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 07:30:52,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:30:52,332 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:30:52,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:30:52,452 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 07:30:52,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 07:30:52,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:52,532 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 07:30:52,543 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 07:30:52,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 07:30:52,580 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-14 07:30:52,580 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 16 treesize of output 18 [2022-12-14 07:30:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:30:52,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:30:57,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:30:57,323 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:30:57,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674301456] [2022-12-14 07:30:57,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674301456] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:30:57,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [795519714] [2022-12-14 07:30:57,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:30:57,324 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:30:57,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:30:57,324 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:30:57,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-12-14 07:30:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:30:57,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 07:30:57,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:30:57,676 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:30:57,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:30:57,790 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 07:30:57,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 07:30:57,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:30:57,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 07:30:57,953 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 07:30:57,953 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 07:30:58,076 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2022-12-14 07:30:58,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-12-14 07:30:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:30:58,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:31:00,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:31:00,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [795519714] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:31:00,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675516458] [2022-12-14 07:31:00,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:31:00,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:31:00,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:31:00,506 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:31:00,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-14 07:31:00,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:31:00,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 07:31:00,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:31:00,746 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:31:00,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:31:00,838 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 07:31:00,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 07:31:00,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:31:00,915 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 07:31:00,923 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 07:31:00,924 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 07:31:00,955 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-14 07:31:00,955 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 16 treesize of output 18 [2022-12-14 07:31:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:31:01,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:31:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:31:07,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675516458] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:31:07,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:31:07,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 7, 7] total 24 [2022-12-14 07:31:07,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514740728] [2022-12-14 07:31:07,457 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:31:07,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 07:31:07,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:31:07,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 07:31:07,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=515, Unknown=1, NotChecked=0, Total=650 [2022-12-14 07:31:07,458 INFO L87 Difference]: Start difference. First operand 2032 states and 8279 transitions. Second operand has 26 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:14,502 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 07:31:30,322 WARN L233 SmtUtils]: Spent 12.22s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:31:32,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:31:42,174 WARN L233 SmtUtils]: Spent 6.64s on a formula simplification. DAG size of input: 60 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:31:55,826 WARN L233 SmtUtils]: Spent 10.44s on a formula simplification. DAG size of input: 67 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:32:06,681 WARN L233 SmtUtils]: Spent 8.18s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:32:35,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:32:37,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:32:45,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:32:47,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:47,917 INFO L93 Difference]: Finished difference Result 5895 states and 22550 transitions. [2022-12-14 07:32:47,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 07:32:47,918 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 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 07:32:47,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:47,932 INFO L225 Difference]: With dead ends: 5895 [2022-12-14 07:32:47,932 INFO L226 Difference]: Without dead ends: 5895 [2022-12-14 07:32:47,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 90.8s TimeCoverageRelationStatistics Valid=614, Invalid=2036, Unknown=2, NotChecked=0, Total=2652 [2022-12-14 07:32:47,933 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1296 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 120 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1296 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:47,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1296 Valid, 123 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1326 Invalid, 5 Unknown, 0 Unchecked, 22.6s Time] [2022-12-14 07:32:47,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5895 states. [2022-12-14 07:32:47,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5895 to 2320. [2022-12-14 07:32:47,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 2293 states have (on average 4.048408198866114) internal successors, (9283), 2319 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:48,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 9283 transitions. [2022-12-14 07:32:48,004 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 9283 transitions. Word has length 12 [2022-12-14 07:32:48,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:48,004 INFO L495 AbstractCegarLoop]: Abstraction has 2320 states and 9283 transitions. [2022-12-14 07:32:48,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:48,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 9283 transitions. [2022-12-14 07:32:48,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 07:32:48,004 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:48,004 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:48,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-12-14 07:32:48,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-14 07:32:48,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2022-12-14 07:32:48,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:32:48,608 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-14 07:32:48,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:48,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1019959430, now seen corresponding path program 2 times [2022-12-14 07:32:48,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:32:48,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [24545435] [2022-12-14 07:32:48,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:32:48,611 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 07:32:48,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:32:48,613 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:32:48,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-12-14 07:32:48,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 07:32:48,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:32:48,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 07:32:48,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:32:48,873 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:32:48,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:32:49,000 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 07:32:49,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 07:32:49,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:49,102 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 07:32:49,111 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 07:32:49,111 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 07:32:49,155 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-14 07:32:49,155 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 16 treesize of output 18 [2022-12-14 07:32:49,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:32:49,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:32:49,228 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:32:49,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [24545435] [2022-12-14 07:32:49,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [24545435] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:32:49,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:32:49,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:32:49,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660256630] [2022-12-14 07:32:49,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:32:49,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:32:49,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:32:49,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:32:49,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:32:49,230 INFO L87 Difference]: Start difference. First operand 2320 states and 9283 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:49,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:49,634 INFO L93 Difference]: Finished difference Result 2686 states and 10415 transitions. [2022-12-14 07:32:49,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:32:49,634 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 07:32:49,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:49,640 INFO L225 Difference]: With dead ends: 2686 [2022-12-14 07:32:49,640 INFO L226 Difference]: Without dead ends: 2686 [2022-12-14 07:32:49,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:32:49,641 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 109 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:49,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 7 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:32:49,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2022-12-14 07:32:49,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 2010. [2022-12-14 07:32:49,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 1983 states have (on average 3.952092788703984) internal successors, (7837), 2009 states have internal predecessors, (7837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:49,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 7837 transitions. [2022-12-14 07:32:49,689 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 7837 transitions. Word has length 13 [2022-12-14 07:32:49,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:49,689 INFO L495 AbstractCegarLoop]: Abstraction has 2010 states and 7837 transitions. [2022-12-14 07:32:49,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:49,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 7837 transitions. [2022-12-14 07:32:49,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 07:32:49,690 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:49,690 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:49,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-12-14 07:32:49,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:32:49,892 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-14 07:32:49,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:49,893 INFO L85 PathProgramCache]: Analyzing trace with hash 974841606, now seen corresponding path program 1 times [2022-12-14 07:32:49,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:32:49,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410407160] [2022-12-14 07:32:49,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:49,894 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 07:32:49,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:32:49,897 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:32:49,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-12-14 07:32:50,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:32:50,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 07:32:50,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:32:50,178 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 07:32:50,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:32:50,337 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 07:32:50,338 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:32:50,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410407160] [2022-12-14 07:32:50,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1410407160] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:32:50,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [157794307] [2022-12-14 07:32:50,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:50,338 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:32:50,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:32:50,339 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:32:50,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-12-14 07:32:50,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:32:50,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:32:50,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:32:50,645 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 07:32:50,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:32:50,685 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 07:32:50,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [157794307] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:32:50,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708152153] [2022-12-14 07:32:50,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:50,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:32:50,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:32:50,687 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:32:50,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-14 07:32:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:32:50,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 07:32:50,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:32:50,887 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 07:32:50,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:32:50,929 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 07:32:50,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708152153] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:32:50,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:32:50,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2022-12-14 07:32:50,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347077851] [2022-12-14 07:32:50,930 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:32:50,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 07:32:50,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:32:50,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 07:32:50,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-12-14 07:32:50,931 INFO L87 Difference]: Start difference. First operand 2010 states and 7837 transitions. Second operand has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:52,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:52,952 INFO L93 Difference]: Finished difference Result 2098 states and 7757 transitions. [2022-12-14 07:32:52,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 07:32:52,953 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 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 07:32:52,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:52,957 INFO L225 Difference]: With dead ends: 2098 [2022-12-14 07:32:52,957 INFO L226 Difference]: Without dead ends: 2098 [2022-12-14 07:32:52,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-12-14 07:32:52,958 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 284 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:52,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 80 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 07:32:52,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2022-12-14 07:32:52,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1763. [2022-12-14 07:32:52,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1736 states have (on average 3.879032258064516) internal successors, (6734), 1762 states have internal predecessors, (6734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:52,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 6734 transitions. [2022-12-14 07:32:52,982 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 6734 transitions. Word has length 13 [2022-12-14 07:32:52,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:52,982 INFO L495 AbstractCegarLoop]: Abstraction has 1763 states and 6734 transitions. [2022-12-14 07:32:52,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:52,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 6734 transitions. [2022-12-14 07:32:52,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 07:32:52,983 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:52,983 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:52,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2022-12-14 07:32:53,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-12-14 07:32:53,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-12-14 07:32:53,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:32:53,585 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-14 07:32:53,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:53,586 INFO L85 PathProgramCache]: Analyzing trace with hash 641633073, now seen corresponding path program 1 times [2022-12-14 07:32:53,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:32:53,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1609689968] [2022-12-14 07:32:53,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:53,587 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 07:32:53,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:32:53,588 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:32:53,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-12-14 07:32:53,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:32:53,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 07:32:53,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:32:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:32:53,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:32:53,849 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:32:53,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1609689968] [2022-12-14 07:32:53,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1609689968] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:32:53,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:32:53,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:32:53,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853560389] [2022-12-14 07:32:53,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:32:53,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:32:53,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:32:53,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:32:53,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:32:53,851 INFO L87 Difference]: Start difference. First operand 1763 states and 6734 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 07:32:54,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:54,471 INFO L93 Difference]: Finished difference Result 2463 states and 8944 transitions. [2022-12-14 07:32:54,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:32:54,471 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 07:32:54,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:54,478 INFO L225 Difference]: With dead ends: 2463 [2022-12-14 07:32:54,478 INFO L226 Difference]: Without dead ends: 2387 [2022-12-14 07:32:54,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:32:54,479 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 81 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:54,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 17 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:32:54,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2022-12-14 07:32:54,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 1657. [2022-12-14 07:32:54,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1619 states have (on average 3.5558987029030265) internal successors, (5757), 1656 states have internal predecessors, (5757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:54,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 5757 transitions. [2022-12-14 07:32:54,510 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 5757 transitions. Word has length 13 [2022-12-14 07:32:54,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:54,510 INFO L495 AbstractCegarLoop]: Abstraction has 1657 states and 5757 transitions. [2022-12-14 07:32:54,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 07:32:54,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 5757 transitions. [2022-12-14 07:32:54,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 07:32:54,510 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:54,510 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:54,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-12-14 07:32:54,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:32:54,712 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-14 07:32:54,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:54,713 INFO L85 PathProgramCache]: Analyzing trace with hash -920265011, now seen corresponding path program 2 times [2022-12-14 07:32:54,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:32:54,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [103702703] [2022-12-14 07:32:54,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:32:54,715 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 07:32:54,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:32:54,717 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:32:54,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-12-14 07:32:54,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 07:32:54,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:32:54,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 07:32:54,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:32:54,983 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:32:54,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:32:55,077 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 07:32:55,077 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 07:32:55,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:55,164 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 07:32:55,177 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 07:32:55,177 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 07:32:55,217 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-14 07:32:55,218 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 16 treesize of output 18 [2022-12-14 07:32:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:32:55,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:32:55,290 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:32:55,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [103702703] [2022-12-14 07:32:55,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [103702703] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:32:55,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:32:55,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:32:55,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996073398] [2022-12-14 07:32:55,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:32:55,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:32:55,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:32:55,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:32:55,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:32:55,291 INFO L87 Difference]: Start difference. First operand 1657 states and 5757 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 07:32:55,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:55,702 INFO L93 Difference]: Finished difference Result 1611 states and 5443 transitions. [2022-12-14 07:32:55,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:32:55,703 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 15 [2022-12-14 07:32:55,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:55,707 INFO L225 Difference]: With dead ends: 1611 [2022-12-14 07:32:55,707 INFO L226 Difference]: Without dead ends: 1587 [2022-12-14 07:32:55,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:32:55,707 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 91 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:55,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 7 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:32:55,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2022-12-14 07:32:55,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1255. [2022-12-14 07:32:55,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1217 states have (on average 3.552177485620378) internal successors, (4323), 1254 states have internal predecessors, (4323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:55,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 4323 transitions. [2022-12-14 07:32:55,728 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 4323 transitions. Word has length 15 [2022-12-14 07:32:55,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:55,728 INFO L495 AbstractCegarLoop]: Abstraction has 1255 states and 4323 transitions. [2022-12-14 07:32:55,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 07:32:55,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 4323 transitions. [2022-12-14 07:32:55,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 07:32:55,729 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:55,729 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:55,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-12-14 07:32:55,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:32:55,931 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-14 07:32:55,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:55,932 INFO L85 PathProgramCache]: Analyzing trace with hash 505157312, now seen corresponding path program 2 times [2022-12-14 07:32:55,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:32:55,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1767770923] [2022-12-14 07:32:55,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:32:55,933 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 07:32:55,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:32:55,934 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:32:55,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-12-14 07:32:56,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 07:32:56,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:32:56,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 07:32:56,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:32:56,193 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:32:56,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:32:56,228 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-14 07:32:56,229 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 16 treesize of output 18 [2022-12-14 07:32:56,239 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 07:32:56,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:56,304 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-12-14 07:32:56,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-12-14 07:32:56,316 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 07:32:56,316 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 07:32:56,478 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 07:32:56,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:32:56,478 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:32:56,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1767770923] [2022-12-14 07:32:56,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1767770923] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:32:56,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:32:56,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:32:56,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492503279] [2022-12-14 07:32:56,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:32:56,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:32:56,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:32:56,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:32:56,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:32:56,479 INFO L87 Difference]: Start difference. First operand 1255 states and 4323 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 07:32:56,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:56,772 INFO L93 Difference]: Finished difference Result 1037 states and 3512 transitions. [2022-12-14 07:32:56,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:32:56,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 15 [2022-12-14 07:32:56,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:56,775 INFO L225 Difference]: With dead ends: 1037 [2022-12-14 07:32:56,775 INFO L226 Difference]: Without dead ends: 1037 [2022-12-14 07:32:56,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:32:56,775 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 90 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:56,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 3 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:32:56,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2022-12-14 07:32:56,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 1037. [2022-12-14 07:32:56,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 1017 states have (on average 3.4532940019665683) internal successors, (3512), 1036 states have internal predecessors, (3512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:56,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 3512 transitions. [2022-12-14 07:32:56,787 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 3512 transitions. Word has length 15 [2022-12-14 07:32:56,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:56,787 INFO L495 AbstractCegarLoop]: Abstraction has 1037 states and 3512 transitions. [2022-12-14 07:32:56,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 07:32:56,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 3512 transitions. [2022-12-14 07:32:56,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 07:32:56,788 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:56,788 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:32:56,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-12-14 07:32:56,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:32:56,990 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-14 07:32:56,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:56,991 INFO L85 PathProgramCache]: Analyzing trace with hash 505157185, now seen corresponding path program 1 times [2022-12-14 07:32:56,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:32:56,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31426325] [2022-12-14 07:32:56,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:32:56,993 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 07:32:56,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:32:56,995 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -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 07:32:56,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33d19738-f1c5-4a14-9a2c-3d47e2fe653b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-12-14 07:32:57,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:32:57,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 07:32:57,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:32:57,366 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:32:57,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:32:57,463 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 07:32:57,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 07:32:57,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:32:57,604 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 19 treesize of output 19 [2022-12-14 07:32:57,615 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 07:32:57,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 07:32:57,704 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-14 07:32:57,704 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 16 treesize of output 18 [2022-12-14 07:32:57,976 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:32:57,976 INFO L328 TraceCheckSpWp]: Computing backward predicates...