./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 01:11:50,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:11:50,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:11:50,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:11:50,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:11:50,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:11:50,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:11:50,392 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:11:50,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:11:50,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:11:50,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:11:50,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:11:50,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:11:50,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:11:50,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:11:50,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:11:50,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:11:50,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:11:50,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:11:50,435 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:11:50,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:11:50,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:11:50,441 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:11:50,442 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:11:50,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:11:50,452 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:11:50,452 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:11:50,454 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:11:50,454 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:11:50,456 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:11:50,457 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:11:50,457 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:11:50,459 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:11:50,461 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:11:50,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:11:50,463 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:11:50,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:11:50,463 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:11:50,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:11:50,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:11:50,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:11:50,467 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-26 01:11:50,504 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:11:50,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:11:50,505 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:11:50,505 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:11:50,506 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:11:50,506 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:11:50,507 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:11:50,507 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:11:50,507 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:11:50,507 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 01:11:50,508 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:11:50,509 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:11:50,509 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 01:11:50,509 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 01:11:50,509 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:11:50,510 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 01:11:50,510 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 01:11:50,510 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 01:11:50,511 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 01:11:50,511 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 01:11:50,511 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:11:50,511 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 01:11:50,512 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 01:11:50,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:11:50,512 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 01:11:50,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:11:50,513 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 01:11:50,513 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 01:11:50,513 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 01:11:50,514 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:11:50,514 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 01:11:50,514 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 01:11:50,514 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:11:50,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:11:50,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:11:50,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:11:50,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:11:50,515 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 01:11:50,516 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:11:50,516 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 01:11:50,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 01:11:50,517 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:11:50,517 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_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 [2022-11-26 01:11:50,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:11:50,845 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:11:50,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:11:50,849 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:11:50,850 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:11:50,851 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2022-11-26 01:11:53,860 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:11:54,044 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:11:54,045 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2022-11-26 01:11:54,052 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/data/8d767db70/54babb9cebf5485e97b9c3c2ebae36cb/FLAG5e3b99d40 [2022-11-26 01:11:54,068 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/data/8d767db70/54babb9cebf5485e97b9c3c2ebae36cb [2022-11-26 01:11:54,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:11:54,072 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:11:54,074 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:11:54,074 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:11:54,078 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:11:54,079 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:11:54" (1/1) ... [2022-11-26 01:11:54,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d28ba68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:11:54, skipping insertion in model container [2022-11-26 01:11:54,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:11:54" (1/1) ... [2022-11-26 01:11:54,089 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:11:54,111 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:11:54,354 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_147b7f01-4695-4528-b906-e3c66e28a36d/sv-benchmarks/c/weaver/chl-word-subst.wvr.c[3345,3358] [2022-11-26 01:11:54,364 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:11:54,377 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-26 01:11:54,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4de21440 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:11:54, skipping insertion in model container [2022-11-26 01:11:54,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:11:54,378 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-26 01:11:54,380 INFO L158 Benchmark]: Toolchain (without parser) took 307.09ms. Allocated memory is still 174.1MB. Free memory was 137.5MB in the beginning and 141.2MB in the end (delta: -3.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-26 01:11:54,381 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 121.6MB. Free memory is still 89.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 01:11:54,382 INFO L158 Benchmark]: CACSL2BoogieTranslator took 304.37ms. Allocated memory is still 174.1MB. Free memory was 137.5MB in the beginning and 141.2MB in the end (delta: -3.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-26 01:11:54,383 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 121.6MB. Free memory is still 89.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 304.37ms. Allocated memory is still 174.1MB. Free memory was 137.5MB in the beginning and 141.2MB in the end (delta: -3.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 138]: 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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 01:11:56,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:11:56,719 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:11:56,747 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:11:56,751 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:11:56,754 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:11:56,759 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:11:56,763 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:11:56,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:11:56,770 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:11:56,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:11:56,774 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:11:56,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:11:56,778 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:11:56,779 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:11:56,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:11:56,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:11:56,787 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:11:56,796 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:11:56,798 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:11:56,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:11:56,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:11:56,802 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:11:56,803 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:11:56,806 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:11:56,806 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:11:56,807 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:11:56,808 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:11:56,808 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:11:56,809 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:11:56,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:11:56,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:11:56,811 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:11:56,812 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:11:56,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:11:56,813 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:11:56,814 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:11:56,825 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:11:56,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:11:56,826 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:11:56,827 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:11:56,831 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-26 01:11:56,874 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:11:56,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:11:56,875 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:11:56,875 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:11:56,876 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:11:56,876 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:11:56,876 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:11:56,877 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:11:56,877 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:11:56,877 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:11:56,877 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:11:56,877 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:11:56,878 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 01:11:56,878 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 01:11:56,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:11:56,879 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 01:11:56,879 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 01:11:56,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:11:56,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 01:11:56,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:11:56,879 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 01:11:56,880 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 01:11:56,880 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 01:11:56,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:11:56,880 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 01:11:56,880 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-26 01:11:56,881 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-26 01:11:56,881 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 01:11:56,881 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:11:56,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:11:56,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-26 01:11:56,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:11:56,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:11:56,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:11:56,884 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:11:56,884 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-26 01:11:56,885 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-26 01:11:56,886 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:11:56,886 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-26 01:11:56,886 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_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 [2022-11-26 01:11:57,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:11:57,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:11:57,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:11:57,314 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:11:57,314 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:11:57,316 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2022-11-26 01:12:00,475 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:12:00,712 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:12:00,718 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2022-11-26 01:12:00,729 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/data/344ee4edc/86a261fc05774d11a1568e75fee0c465/FLAG823fa1d88 [2022-11-26 01:12:00,752 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/data/344ee4edc/86a261fc05774d11a1568e75fee0c465 [2022-11-26 01:12:00,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:12:00,758 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:12:00,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:12:00,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:12:00,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:12:00,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:12:00" (1/1) ... [2022-11-26 01:12:00,767 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60db9290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:00, skipping insertion in model container [2022-11-26 01:12:00,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:12:00" (1/1) ... [2022-11-26 01:12:00,775 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:12:00,812 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:12:01,019 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/sv-benchmarks/c/weaver/chl-word-subst.wvr.c[3345,3358] [2022-11-26 01:12:01,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:12:01,042 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-26 01:12:01,046 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:12:01,070 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_147b7f01-4695-4528-b906-e3c66e28a36d/sv-benchmarks/c/weaver/chl-word-subst.wvr.c[3345,3358] [2022-11-26 01:12:01,074 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:12:01,091 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 01:12:01,119 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_147b7f01-4695-4528-b906-e3c66e28a36d/sv-benchmarks/c/weaver/chl-word-subst.wvr.c[3345,3358] [2022-11-26 01:12:01,123 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:12:01,138 INFO L208 MainTranslator]: Completed translation [2022-11-26 01:12:01,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:01 WrapperNode [2022-11-26 01:12:01,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:12:01,140 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 01:12:01,140 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 01:12:01,140 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 01:12:01,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:01" (1/1) ... [2022-11-26 01:12:01,161 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:01" (1/1) ... [2022-11-26 01:12:01,186 INFO L138 Inliner]: procedures = 27, calls = 45, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 167 [2022-11-26 01:12:01,186 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 01:12:01,187 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 01:12:01,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 01:12:01,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 01:12:01,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:01" (1/1) ... [2022-11-26 01:12:01,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:01" (1/1) ... [2022-11-26 01:12:01,202 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:01" (1/1) ... [2022-11-26 01:12:01,202 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:01" (1/1) ... [2022-11-26 01:12:01,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:01" (1/1) ... [2022-11-26 01:12:01,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:01" (1/1) ... [2022-11-26 01:12:01,222 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:01" (1/1) ... [2022-11-26 01:12:01,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:01" (1/1) ... [2022-11-26 01:12:01,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 01:12:01,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 01:12:01,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 01:12:01,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 01:12:01,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:01" (1/1) ... [2022-11-26 01:12:01,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:12:01,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:12:01,275 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 01:12:01,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 01:12:01,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 01:12:01,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-26 01:12:01,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 01:12:01,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-26 01:12:01,333 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-26 01:12:01,333 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-26 01:12:01,333 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-26 01:12:01,334 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-26 01:12:01,334 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-26 01:12:01,334 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-26 01:12:01,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 01:12:01,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 01:12:01,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 01:12:01,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 01:12:01,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-26 01:12:01,337 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-26 01:12:01,558 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 01:12:01,561 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 01:12:02,750 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 01:12:02,760 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 01:12:02,760 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-26 01:12:02,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:12:02 BoogieIcfgContainer [2022-11-26 01:12:02,763 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 01:12:02,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 01:12:02,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 01:12:02,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 01:12:02,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 01:12:00" (1/3) ... [2022-11-26 01:12:02,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63bf98b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:12:02, skipping insertion in model container [2022-11-26 01:12:02,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:01" (2/3) ... [2022-11-26 01:12:02,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63bf98b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:12:02, skipping insertion in model container [2022-11-26 01:12:02,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:12:02" (3/3) ... [2022-11-26 01:12:02,776 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-subst.wvr.c [2022-11-26 01:12:02,801 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 01:12:02,802 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2022-11-26 01:12:02,802 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-26 01:12:03,015 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-26 01:12:03,069 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-26 01:12:03,095 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 328 places, 347 transitions, 718 flow [2022-11-26 01:12:03,100 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 328 places, 347 transitions, 718 flow [2022-11-26 01:12:03,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 328 places, 347 transitions, 718 flow [2022-11-26 01:12:03,294 INFO L130 PetriNetUnfolder]: 29/344 cut-off events. [2022-11-26 01:12:03,294 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-26 01:12:03,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 344 events. 29/344 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 621 event pairs, 0 based on Foata normal form. 0/271 useless extension candidates. Maximal degree in co-relation 261. Up to 3 conditions per place. [2022-11-26 01:12:03,308 INFO L119 LiptonReduction]: Number of co-enabled transitions 12768 [2022-11-26 01:12:53,799 INFO L134 LiptonReduction]: Checked pairs total: 24989 [2022-11-26 01:12:53,799 INFO L136 LiptonReduction]: Total number of compositions: 387 [2022-11-26 01:12:53,807 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 85 places, 86 transitions, 196 flow [2022-11-26 01:12:54,323 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 10140 states, 7584 states have (on average 5.325290084388186) internal successors, (40387), 10139 states have internal predecessors, (40387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:54,346 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 01:12:54,352 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;@6b5904ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 01:12:54,353 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2022-11-26 01:12:54,391 INFO L276 IsEmpty]: Start isEmpty. Operand has 10140 states, 7584 states have (on average 5.325290084388186) internal successors, (40387), 10139 states have internal predecessors, (40387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:54,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-26 01:12:54,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:54,399 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-26 01:12:54,399 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 01:12:54,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:54,407 INFO L85 PathProgramCache]: Analyzing trace with hash 42934, now seen corresponding path program 1 times [2022-11-26 01:12:54,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:12:54,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941635511] [2022-11-26 01:12:54,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:54,422 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:12:54,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:12:54,430 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:12:54,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-26 01:12:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:54,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 01:12:54,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:54,869 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 01:12:54,870 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 [2022-11-26 01:12:55,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:55,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:12:55,003 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:12:55,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941635511] [2022-11-26 01:12:55,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941635511] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:55,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:55,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 01:12:55,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118729731] [2022-11-26 01:12:55,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:55,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:12:55,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:12:55,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:12:55,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:12:55,126 INFO L87 Difference]: Start difference. First operand has 10140 states, 7584 states have (on average 5.325290084388186) internal successors, (40387), 10139 states have internal predecessors, (40387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:56,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:56,663 INFO L93 Difference]: Finished difference Result 13522 states and 53984 transitions. [2022-11-26 01:12:56,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:12:56,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-26 01:12:56,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:57,021 INFO L225 Difference]: With dead ends: 13522 [2022-11-26 01:12:57,021 INFO L226 Difference]: Without dead ends: 13522 [2022-11-26 01:12:57,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:12:57,027 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:57,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 01:12:57,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13522 states. [2022-11-26 01:12:57,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13522 to 6766. [2022-11-26 01:12:57,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6766 states, 5263 states have (on average 5.131103933117994) internal successors, (27005), 6765 states have internal predecessors, (27005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:57,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6766 states to 6766 states and 27005 transitions. [2022-11-26 01:12:57,955 INFO L78 Accepts]: Start accepts. Automaton has 6766 states and 27005 transitions. Word has length 2 [2022-11-26 01:12:57,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:57,955 INFO L495 AbstractCegarLoop]: Abstraction has 6766 states and 27005 transitions. [2022-11-26 01:12:57,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:57,956 INFO L276 IsEmpty]: Start isEmpty. Operand 6766 states and 27005 transitions. [2022-11-26 01:12:57,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-26 01:12:57,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:57,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-26 01:12:58,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:58,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:12:58,181 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 01:12:58,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:58,182 INFO L85 PathProgramCache]: Analyzing trace with hash 42935, now seen corresponding path program 1 times [2022-11-26 01:12:58,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:12:58,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [539666343] [2022-11-26 01:12:58,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:58,182 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:12:58,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:12:58,199 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:12:58,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-26 01:12:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:58,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:12:58,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:58,361 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-26 01:12:58,362 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 [2022-11-26 01:12:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:58,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:12:58,380 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:12:58,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [539666343] [2022-11-26 01:12:58,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [539666343] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:58,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:58,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 01:12:58,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801557404] [2022-11-26 01:12:58,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:58,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:12:58,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:12:58,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:12:58,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:12:58,383 INFO L87 Difference]: Start difference. First operand 6766 states and 27005 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:58,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:58,890 INFO L93 Difference]: Finished difference Result 6763 states and 26999 transitions. [2022-11-26 01:12:58,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:12:58,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-26 01:12:58,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:59,005 INFO L225 Difference]: With dead ends: 6763 [2022-11-26 01:12:59,006 INFO L226 Difference]: Without dead ends: 6763 [2022-11-26 01:12:59,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:12:59,011 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:59,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:12:59,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2022-11-26 01:12:59,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6763. [2022-11-26 01:12:59,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 5263 states have (on average 5.129963898916968) internal successors, (26999), 6762 states have internal predecessors, (26999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:59,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 26999 transitions. [2022-11-26 01:12:59,482 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 26999 transitions. Word has length 2 [2022-11-26 01:12:59,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:59,483 INFO L495 AbstractCegarLoop]: Abstraction has 6763 states and 26999 transitions. [2022-11-26 01:12:59,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:59,484 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 26999 transitions. [2022-11-26 01:12:59,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-26 01:12:59,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:59,484 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-26 01:12:59,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:59,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:12:59,695 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 01:12:59,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:59,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1338455, now seen corresponding path program 1 times [2022-11-26 01:12:59,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:12:59,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988567327] [2022-11-26 01:12:59,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:59,696 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:12:59,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:12:59,719 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:12:59,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-26 01:12:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:59,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 01:12:59,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:59,996 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 01:12:59,997 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 [2022-11-26 01:13:00,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:00,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:13:00,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:00,319 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:13:00,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988567327] [2022-11-26 01:13:00,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988567327] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:13:00,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [605673327] [2022-11-26 01:13:00,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:13:00,320 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:13:00,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:13:00,326 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:13:00,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-26 01:13:00,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:13:00,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 01:13:00,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:00,617 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 01:13:00,618 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 [2022-11-26 01:13:00,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:00,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:13:00,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:00,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [605673327] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:13:00,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620330529] [2022-11-26 01:13:00,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:13:00,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:13:00,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:13:00,757 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:13:00,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 01:13:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:13:00,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 01:13:00,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:00,990 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 01:13:00,990 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 [2022-11-26 01:13:01,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:01,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:13:01,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:01,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620330529] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:13:01,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 01:13:01,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-26 01:13:01,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474012347] [2022-11-26 01:13:01,199 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 01:13:01,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 01:13:01,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:13:01,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 01:13:01,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-26 01:13:01,205 INFO L87 Difference]: Start difference. First operand 6763 states and 26999 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:13:02,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:04,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:06,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:13:06,996 INFO L93 Difference]: Finished difference Result 27031 states and 107960 transitions. [2022-11-26 01:13:06,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:13:06,997 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-26 01:13:06,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:13:07,207 INFO L225 Difference]: With dead ends: 27031 [2022-11-26 01:13:07,207 INFO L226 Difference]: Without dead ends: 27031 [2022-11-26 01:13:07,208 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 [2022-11-26 01:13:07,209 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 517 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:13:07,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 0 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-26 01:13:07,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27031 states. [2022-11-26 01:13:07,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27031 to 6772. [2022-11-26 01:13:07,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6772 states, 5272 states have (on average 5.125758725341426) internal successors, (27023), 6771 states have internal predecessors, (27023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:13:08,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6772 states to 6772 states and 27023 transitions. [2022-11-26 01:13:08,023 INFO L78 Accepts]: Start accepts. Automaton has 6772 states and 27023 transitions. Word has length 3 [2022-11-26 01:13:08,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:13:08,023 INFO L495 AbstractCegarLoop]: Abstraction has 6772 states and 27023 transitions. [2022-11-26 01:13:08,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:13:08,024 INFO L276 IsEmpty]: Start isEmpty. Operand 6772 states and 27023 transitions. [2022-11-26 01:13:08,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-26 01:13:08,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:13:08,030 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-26 01:13:08,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:08,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:08,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:08,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:13:08,640 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 01:13:08,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:13:08,642 INFO L85 PathProgramCache]: Analyzing trace with hash 41581335, now seen corresponding path program 1 times [2022-11-26 01:13:08,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:13:08,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [129091687] [2022-11-26 01:13:08,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:13:08,644 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:13:08,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:13:08,648 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:13:08,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-26 01:13:08,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:13:08,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 01:13:08,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:08,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:13:08,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:13:08,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:13:08,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:13:08,928 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-26 01:13:08,929 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 [2022-11-26 01:13:08,968 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-26 01:13:08,969 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 [2022-11-26 01:13:09,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:13:09,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-26 01:13:09,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:13:09,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-26 01:13:09,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:09,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:13:09,111 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:13:09,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [129091687] [2022-11-26 01:13:09,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [129091687] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:13:09,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:13:09,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:13:09,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608690840] [2022-11-26 01:13:09,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:13:09,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:13:09,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:13:09,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:13:09,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:13:09,113 INFO L87 Difference]: Start difference. First operand 6772 states and 27023 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) [2022-11-26 01:13:09,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:13:09,599 INFO L93 Difference]: Finished difference Result 5399 states and 20942 transitions. [2022-11-26 01:13:09,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:13:09,600 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 [2022-11-26 01:13:09,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:13:09,632 INFO L225 Difference]: With dead ends: 5399 [2022-11-26 01:13:09,632 INFO L226 Difference]: Without dead ends: 5399 [2022-11-26 01:13:09,632 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 [2022-11-26 01:13:09,633 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 138 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:13:09,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 0 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:13:09,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5399 states. [2022-11-26 01:13:09,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5399 to 5399. [2022-11-26 01:13:09,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5399 states, 4305 states have (on average 4.864576074332172) internal successors, (20942), 5398 states have internal predecessors, (20942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:13:09,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5399 states to 5399 states and 20942 transitions. [2022-11-26 01:13:09,935 INFO L78 Accepts]: Start accepts. Automaton has 5399 states and 20942 transitions. Word has length 4 [2022-11-26 01:13:09,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:13:09,936 INFO L495 AbstractCegarLoop]: Abstraction has 5399 states and 20942 transitions. [2022-11-26 01:13:09,936 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) [2022-11-26 01:13:09,936 INFO L276 IsEmpty]: Start isEmpty. Operand 5399 states and 20942 transitions. [2022-11-26 01:13:09,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-26 01:13:09,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:13:09,936 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-26 01:13:09,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:10,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:13:10,148 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 01:13:10,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:13:10,149 INFO L85 PathProgramCache]: Analyzing trace with hash 41581336, now seen corresponding path program 1 times [2022-11-26 01:13:10,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:13:10,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690565377] [2022-11-26 01:13:10,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:13:10,150 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:13:10,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:13:10,150 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:13:10,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-26 01:13:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:13:10,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 01:13:10,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:10,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:13:10,411 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-26 01:13:10,411 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 [2022-11-26 01:13:10,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:13:10,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 01:13:10,556 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 01:13:10,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 01:13:10,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:10,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:13:10,570 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:13:10,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690565377] [2022-11-26 01:13:10,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690565377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:13:10,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:13:10,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:13:10,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168182994] [2022-11-26 01:13:10,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:13:10,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:13:10,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:13:10,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:13:10,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:13:10,572 INFO L87 Difference]: Start difference. First operand 5399 states and 20942 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) [2022-11-26 01:13:10,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:13:10,967 INFO L93 Difference]: Finished difference Result 4026 states and 14861 transitions. [2022-11-26 01:13:10,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:13:10,968 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 [2022-11-26 01:13:10,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:13:10,989 INFO L225 Difference]: With dead ends: 4026 [2022-11-26 01:13:10,989 INFO L226 Difference]: Without dead ends: 4026 [2022-11-26 01:13:10,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:13:10,990 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 67 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:13:10,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 0 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:13:11,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2022-11-26 01:13:11,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 4026. [2022-11-26 01:13:11,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4026 states, 3338 states have (on average 4.452067106051528) internal successors, (14861), 4025 states have internal predecessors, (14861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:13:11,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4026 states to 4026 states and 14861 transitions. [2022-11-26 01:13:11,223 INFO L78 Accepts]: Start accepts. Automaton has 4026 states and 14861 transitions. Word has length 4 [2022-11-26 01:13:11,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:13:11,227 INFO L495 AbstractCegarLoop]: Abstraction has 4026 states and 14861 transitions. [2022-11-26 01:13:11,227 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) [2022-11-26 01:13:11,227 INFO L276 IsEmpty]: Start isEmpty. Operand 4026 states and 14861 transitions. [2022-11-26 01:13:11,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 01:13:11,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:13:11,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 01:13:11,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:11,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:13:11,441 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 01:13:11,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:13:11,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1304989203, now seen corresponding path program 1 times [2022-11-26 01:13:11,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:13:11,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057434893] [2022-11-26 01:13:11,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:13:11,445 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:13:11,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:13:11,450 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:13:11,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-26 01:13:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:13:11,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 01:13:11,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:11,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:13:11,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:13:11,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:13:11,721 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-26 01:13:11,721 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 [2022-11-26 01:13:11,736 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 [2022-11-26 01:13:11,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:13:11,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-26 01:13:11,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:13:11,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-26 01:13:11,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:11,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:13:11,883 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:13:11,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057434893] [2022-11-26 01:13:11,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057434893] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:13:11,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:13:11,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:13:11,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488872754] [2022-11-26 01:13:11,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:13:11,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:13:11,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:13:11,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:13:11,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:13:11,885 INFO L87 Difference]: Start difference. First operand 4026 states and 14861 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:13:12,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:13:12,320 INFO L93 Difference]: Finished difference Result 3914 states and 14509 transitions. [2022-11-26 01:13:12,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:13:12,320 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 01:13:12,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:13:12,334 INFO L225 Difference]: With dead ends: 3914 [2022-11-26 01:13:12,334 INFO L226 Difference]: Without dead ends: 3914 [2022-11-26 01:13:12,334 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 [2022-11-26 01:13:12,335 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 128 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:13:12,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 0 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:13:12,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3914 states. [2022-11-26 01:13:12,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3914 to 3914. [2022-11-26 01:13:12,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3914 states, 3280 states have (on average 4.423475609756098) internal successors, (14509), 3913 states have internal predecessors, (14509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:13:12,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3914 states to 3914 states and 14509 transitions. [2022-11-26 01:13:12,437 INFO L78 Accepts]: Start accepts. Automaton has 3914 states and 14509 transitions. Word has length 6 [2022-11-26 01:13:12,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:13:12,438 INFO L495 AbstractCegarLoop]: Abstraction has 3914 states and 14509 transitions. [2022-11-26 01:13:12,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:13:12,438 INFO L276 IsEmpty]: Start isEmpty. Operand 3914 states and 14509 transitions. [2022-11-26 01:13:12,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 01:13:12,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:13:12,439 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 01:13:12,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:12,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:13:12,657 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 01:13:12,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:13:12,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1304989204, now seen corresponding path program 1 times [2022-11-26 01:13:12,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:13:12,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1369347012] [2022-11-26 01:13:12,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:13:12,657 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:13:12,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:13:12,658 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:13:12,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-26 01:13:12,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:13:12,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 01:13:12,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:12,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:13:12,878 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-26 01:13:12,879 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 [2022-11-26 01:13:13,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:13:13,241 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-26 01:13:13,242 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 [2022-11-26 01:13:13,421 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-26 01:13:13,422 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 [2022-11-26 01:13:13,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:13,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:13:13,612 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:13:13,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1369347012] [2022-11-26 01:13:13,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1369347012] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:13:13,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:13:13,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:13:13,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872364710] [2022-11-26 01:13:13,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:13:13,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:13:13,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:13:13,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:13:13,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:13:13,614 INFO L87 Difference]: Start difference. First operand 3914 states and 14509 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:13:14,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:13:14,097 INFO L93 Difference]: Finished difference Result 3802 states and 14157 transitions. [2022-11-26 01:13:14,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:13:14,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 01:13:14,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:13:14,111 INFO L225 Difference]: With dead ends: 3802 [2022-11-26 01:13:14,111 INFO L226 Difference]: Without dead ends: 3802 [2022-11-26 01:13:14,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:13:14,112 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 124 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:13:14,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 0 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 01:13:14,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3802 states. [2022-11-26 01:13:14,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3802 to 3802. [2022-11-26 01:13:14,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3802 states, 3222 states have (on average 4.393854748603352) internal successors, (14157), 3801 states have internal predecessors, (14157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:13:14,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3802 states to 3802 states and 14157 transitions. [2022-11-26 01:13:14,215 INFO L78 Accepts]: Start accepts. Automaton has 3802 states and 14157 transitions. Word has length 6 [2022-11-26 01:13:14,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:13:14,216 INFO L495 AbstractCegarLoop]: Abstraction has 3802 states and 14157 transitions. [2022-11-26 01:13:14,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:13:14,216 INFO L276 IsEmpty]: Start isEmpty. Operand 3802 states and 14157 transitions. [2022-11-26 01:13:14,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 01:13:14,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:13:14,217 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-26 01:13:14,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-11-26 01:13:14,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:13:14,430 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 01:13:14,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:13:14,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1226655734, now seen corresponding path program 2 times [2022-11-26 01:13:14,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:13:14,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1929679783] [2022-11-26 01:13:14,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 01:13:14,433 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:13:14,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:13:14,436 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:13:14,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-26 01:13:14,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 01:13:14,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:13:14,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 01:13:14,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:14,703 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 01:13:14,703 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 [2022-11-26 01:13:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:14,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:13:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:15,516 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:13:15,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1929679783] [2022-11-26 01:13:15,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1929679783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:13:15,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1501868046] [2022-11-26 01:13:15,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 01:13:15,517 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:13:15,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:13:15,518 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:13:15,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-26 01:13:15,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 01:13:15,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:13:15,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 01:13:15,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:15,860 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 01:13:15,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 01:13:15,999 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:15,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:13:16,881 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:16,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1501868046] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:13:16,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488103525] [2022-11-26 01:13:16,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 01:13:16,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:13:16,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:13:16,887 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:13:16,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 01:13:17,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 01:13:17,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:13:17,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 01:13:17,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:17,155 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 01:13:17,156 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 17 treesize of output 44 [2022-11-26 01:13:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:17,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:13:17,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:17,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488103525] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:13:17,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 01:13:17,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-11-26 01:13:17,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063569373] [2022-11-26 01:13:17,388 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 01:13:17,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-26 01:13:17,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:13:17,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-26 01:13:17,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-26 01:13:17,390 INFO L87 Difference]: Start difference. First operand 3802 states and 14157 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) [2022-11-26 01:13:21,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:23,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:24,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:25,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:27,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:28,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:30,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:33,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:35,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:38,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:40,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:41,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:43,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:46,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:48,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:50,606 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 [] [2022-11-26 01:13:57,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:13:57,359 INFO L93 Difference]: Finished difference Result 34081 states and 127169 transitions. [2022-11-26 01:13:57,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-26 01:13:57,360 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 [2022-11-26 01:13:57,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:13:57,498 INFO L225 Difference]: With dead ends: 34081 [2022-11-26 01:13:57,499 INFO L226 Difference]: Without dead ends: 34081 [2022-11-26 01:13:57,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2022-11-26 01:13:57,500 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1541 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2067 mSolverCounterSat, 74 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1541 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2067 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.7s IncrementalHoareTripleChecker+Time [2022-11-26 01:13:57,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1541 Valid, 0 Invalid, 2151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2067 Invalid, 10 Unknown, 0 Unchecked, 37.7s Time] [2022-11-26 01:13:57,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34081 states. [2022-11-26 01:13:58,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34081 to 3813. [2022-11-26 01:13:58,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 3233 states have (on average 4.3857098669965975) internal successors, (14179), 3812 states have internal predecessors, (14179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:13:58,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 14179 transitions. [2022-11-26 01:13:58,205 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 14179 transitions. Word has length 6 [2022-11-26 01:13:58,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:13:58,205 INFO L495 AbstractCegarLoop]: Abstraction has 3813 states and 14179 transitions. [2022-11-26 01:13:58,205 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) [2022-11-26 01:13:58,205 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 14179 transitions. [2022-11-26 01:13:58,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 01:13:58,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:13:58,206 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:13:58,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:58,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:58,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:58,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 01:13:58,807 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 01:13:58,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:13:58,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1799959352, now seen corresponding path program 1 times [2022-11-26 01:13:58,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:13:58,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228813863] [2022-11-26 01:13:58,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:13:58,812 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:13:58,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:13:58,813 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:13:58,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-26 01:13:58,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:13:58,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 01:13:58,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:58,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:58,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:13:58,971 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:13:58,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228813863] [2022-11-26 01:13:58,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228813863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:13:58,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:13:58,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:13:58,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073475960] [2022-11-26 01:13:58,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:13:58,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:13:58,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:13:58,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:13:58,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:13:58,973 INFO L87 Difference]: Start difference. First operand 3813 states and 14179 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) [2022-11-26 01:13:59,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:13:59,922 INFO L93 Difference]: Finished difference Result 5299 states and 19058 transitions. [2022-11-26 01:13:59,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:13:59,923 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 [2022-11-26 01:13:59,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:13:59,936 INFO L225 Difference]: With dead ends: 5299 [2022-11-26 01:13:59,936 INFO L226 Difference]: Without dead ends: 5299 [2022-11-26 01:13:59,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:13:59,937 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 85 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 01:13:59,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 3 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 01:13:59,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5299 states. [2022-11-26 01:14:00,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5299 to 4337. [2022-11-26 01:14:00,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4337 states, 3757 states have (on average 4.341229704551504) internal successors, (16310), 4336 states have internal predecessors, (16310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:14:00,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4337 states to 4337 states and 16310 transitions. [2022-11-26 01:14:00,066 INFO L78 Accepts]: Start accepts. Automaton has 4337 states and 16310 transitions. Word has length 7 [2022-11-26 01:14:00,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:14:00,067 INFO L495 AbstractCegarLoop]: Abstraction has 4337 states and 16310 transitions. [2022-11-26 01:14:00,067 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) [2022-11-26 01:14:00,067 INFO L276 IsEmpty]: Start isEmpty. Operand 4337 states and 16310 transitions. [2022-11-26 01:14:00,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 01:14:00,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:14:00,069 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:14:00,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-26 01:14:00,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:14:00,282 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 01:14:00,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:14:00,283 INFO L85 PathProgramCache]: Analyzing trace with hash -35797331, now seen corresponding path program 1 times [2022-11-26 01:14:00,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:14:00,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1265761463] [2022-11-26 01:14:00,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:14:00,285 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:14:00,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:14:00,292 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:14:00,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-26 01:14:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:14:00,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 01:14:00,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:14:00,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:00,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:00,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:00,545 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-26 01:14:00,546 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 [2022-11-26 01:14:00,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-26 01:14:00,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:00,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-26 01:14:00,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:00,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-26 01:14:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:14:00,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:14:00,799 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:14:00,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1265761463] [2022-11-26 01:14:00,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1265761463] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:14:00,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:14:00,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:14:00,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236452] [2022-11-26 01:14:00,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:14:00,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:14:00,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:14:00,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:14:00,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:14:00,800 INFO L87 Difference]: Start difference. First operand 4337 states and 16310 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) [2022-11-26 01:14:01,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:14:01,184 INFO L93 Difference]: Finished difference Result 4106 states and 15549 transitions. [2022-11-26 01:14:01,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:14:01,185 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 [2022-11-26 01:14:01,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:14:01,199 INFO L225 Difference]: With dead ends: 4106 [2022-11-26 01:14:01,199 INFO L226 Difference]: Without dead ends: 4106 [2022-11-26 01:14:01,200 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 [2022-11-26 01:14:01,200 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 122 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:14:01,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 0 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:14:01,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2022-11-26 01:14:01,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4106. [2022-11-26 01:14:01,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4106 states, 3612 states have (on average 4.304817275747508) internal successors, (15549), 4105 states have internal predecessors, (15549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:14:01,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4106 states to 4106 states and 15549 transitions. [2022-11-26 01:14:01,304 INFO L78 Accepts]: Start accepts. Automaton has 4106 states and 15549 transitions. Word has length 8 [2022-11-26 01:14:01,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:14:01,304 INFO L495 AbstractCegarLoop]: Abstraction has 4106 states and 15549 transitions. [2022-11-26 01:14:01,304 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) [2022-11-26 01:14:01,304 INFO L276 IsEmpty]: Start isEmpty. Operand 4106 states and 15549 transitions. [2022-11-26 01:14:01,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 01:14:01,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:14:01,305 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:14:01,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-26 01:14:01,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:14:01,518 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 01:14:01,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:14:01,519 INFO L85 PathProgramCache]: Analyzing trace with hash -35797330, now seen corresponding path program 1 times [2022-11-26 01:14:01,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:14:01,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842007091] [2022-11-26 01:14:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:14:01,522 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:14:01,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:14:01,526 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:14:01,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-26 01:14:01,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:14:01,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 01:14:01,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:14:01,769 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-26 01:14:01,770 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 [2022-11-26 01:14:01,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:01,815 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 [2022-11-26 01:14:01,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:01,850 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 [2022-11-26 01:14:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:14:01,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:14:01,942 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:14:01,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842007091] [2022-11-26 01:14:01,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842007091] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:14:01,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:14:01,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:14:01,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346703449] [2022-11-26 01:14:01,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:14:01,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:14:01,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:14:01,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:14:01,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:14:01,944 INFO L87 Difference]: Start difference. First operand 4106 states and 15549 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) [2022-11-26 01:14:02,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:14:02,416 INFO L93 Difference]: Finished difference Result 3875 states and 14788 transitions. [2022-11-26 01:14:02,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:14:02,419 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 [2022-11-26 01:14:02,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:14:02,433 INFO L225 Difference]: With dead ends: 3875 [2022-11-26 01:14:02,433 INFO L226 Difference]: Without dead ends: 3875 [2022-11-26 01:14:02,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:14:02,434 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 114 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:14:02,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 0 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:14:02,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3875 states. [2022-11-26 01:14:02,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3875 to 3875. [2022-11-26 01:14:02,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3875 states, 3467 states have (on average 4.26535910008653) internal successors, (14788), 3874 states have internal predecessors, (14788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:14:02,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3875 states to 3875 states and 14788 transitions. [2022-11-26 01:14:02,591 INFO L78 Accepts]: Start accepts. Automaton has 3875 states and 14788 transitions. Word has length 8 [2022-11-26 01:14:02,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:14:02,591 INFO L495 AbstractCegarLoop]: Abstraction has 3875 states and 14788 transitions. [2022-11-26 01:14:02,591 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) [2022-11-26 01:14:02,592 INFO L276 IsEmpty]: Start isEmpty. Operand 3875 states and 14788 transitions. [2022-11-26 01:14:02,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 01:14:02,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:14:02,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:14:02,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-26 01:14:02,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:14:02,805 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 01:14:02,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:14:02,805 INFO L85 PathProgramCache]: Analyzing trace with hash 128723767, now seen corresponding path program 1 times [2022-11-26 01:14:02,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:14:02,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [229285146] [2022-11-26 01:14:02,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:14:02,806 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:14:02,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:14:02,812 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:14:02,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-26 01:14:02,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:14:02,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 01:14:02,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:14:03,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:14:03,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:14:03,010 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:14:03,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [229285146] [2022-11-26 01:14:03,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [229285146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:14:03,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:14:03,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:14:03,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436849666] [2022-11-26 01:14:03,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:14:03,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:14:03,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:14:03,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:14:03,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:14:03,011 INFO L87 Difference]: Start difference. First operand 3875 states and 14788 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:14:03,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:14:03,927 INFO L93 Difference]: Finished difference Result 5674 states and 21180 transitions. [2022-11-26 01:14:03,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:14:03,928 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-26 01:14:03,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:14:03,942 INFO L225 Difference]: With dead ends: 5674 [2022-11-26 01:14:03,942 INFO L226 Difference]: Without dead ends: 5674 [2022-11-26 01:14:03,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:14:03,943 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 75 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 01:14:03,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 3 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 01:14:03,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2022-11-26 01:14:04,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 3875. [2022-11-26 01:14:04,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3875 states, 3467 states have (on average 4.26535910008653) internal successors, (14788), 3874 states have internal predecessors, (14788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:14:04,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3875 states to 3875 states and 14788 transitions. [2022-11-26 01:14:04,026 INFO L78 Accepts]: Start accepts. Automaton has 3875 states and 14788 transitions. Word has length 8 [2022-11-26 01:14:04,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:14:04,026 INFO L495 AbstractCegarLoop]: Abstraction has 3875 states and 14788 transitions. [2022-11-26 01:14:04,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:14:04,026 INFO L276 IsEmpty]: Start isEmpty. Operand 3875 states and 14788 transitions. [2022-11-26 01:14:04,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 01:14:04,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:14:04,027 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:14:04,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-26 01:14:04,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:14:04,235 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 01:14:04,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:14:04,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1109717499, now seen corresponding path program 1 times [2022-11-26 01:14:04,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:14:04,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [956453161] [2022-11-26 01:14:04,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:14:04,239 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:14:04,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:14:04,243 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:14:04,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-26 01:14:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:14:04,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 01:14:04,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:14:04,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 01:14:04,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:14:04,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:14:04,485 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:14:04,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [956453161] [2022-11-26 01:14:04,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [956453161] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:14:04,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:14:04,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:14:04,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740758706] [2022-11-26 01:14:04,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:14:04,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:14:04,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:14:04,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:14:04,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:14:04,486 INFO L87 Difference]: Start difference. First operand 3875 states and 14788 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:14:05,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:14:05,277 INFO L93 Difference]: Finished difference Result 7131 states and 27138 transitions. [2022-11-26 01:14:05,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:14:05,278 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-26 01:14:05,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:14:05,304 INFO L225 Difference]: With dead ends: 7131 [2022-11-26 01:14:05,305 INFO L226 Difference]: Without dead ends: 7131 [2022-11-26 01:14:05,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:14:05,306 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 174 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 01:14:05,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 0 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 01:14:05,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7131 states. [2022-11-26 01:14:05,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7131 to 4145. [2022-11-26 01:14:05,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4145 states, 3737 states have (on average 4.514851485148514) internal successors, (16872), 4144 states have internal predecessors, (16872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:14:05,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4145 states to 4145 states and 16872 transitions. [2022-11-26 01:14:05,407 INFO L78 Accepts]: Start accepts. Automaton has 4145 states and 16872 transitions. Word has length 9 [2022-11-26 01:14:05,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:14:05,408 INFO L495 AbstractCegarLoop]: Abstraction has 4145 states and 16872 transitions. [2022-11-26 01:14:05,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:14:05,408 INFO L276 IsEmpty]: Start isEmpty. Operand 4145 states and 16872 transitions. [2022-11-26 01:14:05,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 01:14:05,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:14:05,409 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:14:05,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-26 01:14:05,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:14:05,622 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 01:14:05,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:14:05,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1109717498, now seen corresponding path program 1 times [2022-11-26 01:14:05,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:14:05,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [321202106] [2022-11-26 01:14:05,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:14:05,625 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:14:05,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:14:05,628 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:14:05,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-26 01:14:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:14:05,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 01:14:05,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:14:05,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-26 01:14:05,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:14:05,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:14:05,783 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:14:05,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [321202106] [2022-11-26 01:14:05,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [321202106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:14:05,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:14:05,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:14:05,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552596687] [2022-11-26 01:14:05,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:14:05,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:14:05,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:14:05,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:14:05,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:14:05,785 INFO L87 Difference]: Start difference. First operand 4145 states and 16872 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:14:06,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:14:06,138 INFO L93 Difference]: Finished difference Result 3161 states and 12808 transitions. [2022-11-26 01:14:06,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:14:06,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-26 01:14:06,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:14:06,146 INFO L225 Difference]: With dead ends: 3161 [2022-11-26 01:14:06,146 INFO L226 Difference]: Without dead ends: 3161 [2022-11-26 01:14:06,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:14:06,147 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 101 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:14:06,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 0 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:14:06,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3161 states. [2022-11-26 01:14:06,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3161 to 3161. [2022-11-26 01:14:06,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3161 states, 2906 states have (on average 4.407432897453544) internal successors, (12808), 3160 states have internal predecessors, (12808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:14:06,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3161 states to 3161 states and 12808 transitions. [2022-11-26 01:14:06,196 INFO L78 Accepts]: Start accepts. Automaton has 3161 states and 12808 transitions. Word has length 9 [2022-11-26 01:14:06,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:14:06,196 INFO L495 AbstractCegarLoop]: Abstraction has 3161 states and 12808 transitions. [2022-11-26 01:14:06,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:14:06,196 INFO L276 IsEmpty]: Start isEmpty. Operand 3161 states and 12808 transitions. [2022-11-26 01:14:06,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 01:14:06,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:14:06,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:14:06,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-26 01:14:06,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:14:06,403 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 01:14:06,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:14:06,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1109717561, now seen corresponding path program 1 times [2022-11-26 01:14:06,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:14:06,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793335865] [2022-11-26 01:14:06,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:14:06,407 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:14:06,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:14:06,412 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:14:06,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-26 01:14:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:14:06,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 01:14:06,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:14:06,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:14:06,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:14:06,631 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:14:06,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793335865] [2022-11-26 01:14:06,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [793335865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:14:06,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:14:06,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:14:06,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88476673] [2022-11-26 01:14:06,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:14:06,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:14:06,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:14:06,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:14:06,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:14:06,632 INFO L87 Difference]: Start difference. First operand 3161 states and 12808 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) [2022-11-26 01:14:07,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:14:07,403 INFO L93 Difference]: Finished difference Result 3422 states and 13592 transitions. [2022-11-26 01:14:07,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:14:07,403 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 [2022-11-26 01:14:07,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:14:07,412 INFO L225 Difference]: With dead ends: 3422 [2022-11-26 01:14:07,412 INFO L226 Difference]: Without dead ends: 3422 [2022-11-26 01:14:07,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:14:07,413 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 44 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 01:14:07,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 4 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 01:14:07,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2022-11-26 01:14:07,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 3284. [2022-11-26 01:14:07,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3284 states, 3029 states have (on average 4.3803235391218225) internal successors, (13268), 3283 states have internal predecessors, (13268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:14:07,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3284 states to 3284 states and 13268 transitions. [2022-11-26 01:14:07,499 INFO L78 Accepts]: Start accepts. Automaton has 3284 states and 13268 transitions. Word has length 9 [2022-11-26 01:14:07,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:14:07,499 INFO L495 AbstractCegarLoop]: Abstraction has 3284 states and 13268 transitions. [2022-11-26 01:14:07,499 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) [2022-11-26 01:14:07,500 INFO L276 IsEmpty]: Start isEmpty. Operand 3284 states and 13268 transitions. [2022-11-26 01:14:07,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 01:14:07,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:14:07,500 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1] [2022-11-26 01:14:07,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-26 01:14:07,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:14:07,708 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 01:14:07,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:14:07,709 INFO L85 PathProgramCache]: Analyzing trace with hash -765156062, now seen corresponding path program 1 times [2022-11-26 01:14:07,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:14:07,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896988773] [2022-11-26 01:14:07,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:14:07,711 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:14:07,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:14:07,715 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:14:07,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-26 01:14:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:14:07,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 01:14:07,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:14:07,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 01:14:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:14:08,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:14:09,563 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:14:09,564 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:14:09,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896988773] [2022-11-26 01:14:09,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [896988773] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:14:09,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [450808733] [2022-11-26 01:14:09,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:14:09,564 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:14:09,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:14:09,567 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:14:09,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-26 01:14:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:14:09,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 01:14:09,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:14:09,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 01:14:10,062 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:14:10,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:14:10,635 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:14:10,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [450808733] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:14:10,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769677699] [2022-11-26 01:14:10,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:14:10,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:14:10,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:14:10,637 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:14:10,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-26 01:14:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:14:10,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 01:14:10,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:14:10,790 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 01:14:10,905 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:14:10,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:14:11,197 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:14:11,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769677699] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:14:11,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 01:14:11,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 19 [2022-11-26 01:14:11,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992965174] [2022-11-26 01:14:11,198 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 01:14:11,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 01:14:11,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:14:11,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 01:14:11,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2022-11-26 01:14:11,200 INFO L87 Difference]: Start difference. First operand 3284 states and 13268 transitions. Second operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:14:15,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:14:16,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:14:18,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:14:20,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:14:22,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:14:24,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:14:27,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:14:29,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:14:31,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:14:33,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:14:35,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:14:37,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:14:39,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:14:41,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:14:44,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:14:51,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:14:51,255 INFO L93 Difference]: Finished difference Result 29155 states and 118618 transitions. [2022-11-26 01:14:51,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-26 01:14:51,257 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-26 01:14:51,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:14:51,389 INFO L225 Difference]: With dead ends: 29155 [2022-11-26 01:14:51,390 INFO L226 Difference]: Without dead ends: 29155 [2022-11-26 01:14:51,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=251, Invalid=451, Unknown=0, NotChecked=0, Total=702 [2022-11-26 01:14:51,391 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1849 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3054 mSolverCounterSat, 196 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1849 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 3054 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:14:51,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1849 Valid, 0 Invalid, 3258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 3054 Invalid, 8 Unknown, 0 Unchecked, 36.1s Time] [2022-11-26 01:14:51,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29155 states. [2022-11-26 01:14:51,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29155 to 3307. [2022-11-26 01:14:51,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3307 states, 3052 states have (on average 4.362385321100917) internal successors, (13314), 3306 states have internal predecessors, (13314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:14:51,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3307 states to 3307 states and 13314 transitions. [2022-11-26 01:14:51,709 INFO L78 Accepts]: Start accepts. Automaton has 3307 states and 13314 transitions. Word has length 9 [2022-11-26 01:14:51,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:14:51,709 INFO L495 AbstractCegarLoop]: Abstraction has 3307 states and 13314 transitions. [2022-11-26 01:14:51,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:14:51,710 INFO L276 IsEmpty]: Start isEmpty. Operand 3307 states and 13314 transitions. [2022-11-26 01:14:51,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 01:14:51,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:14:51,710 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:14:51,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-26 01:14:51,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-26 01:14:52,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-26 01:14:52,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:14:52,319 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 01:14:52,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:14:52,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1453746304, now seen corresponding path program 1 times [2022-11-26 01:14:52,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:14:52,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257617974] [2022-11-26 01:14:52,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:14:52,323 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:14:52,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:14:52,327 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:14:52,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-26 01:14:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:14:52,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 01:14:52,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:14:52,643 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-26 01:14:52,643 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 [2022-11-26 01:14:52,682 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 01:14:52,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-26 01:14:52,711 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 01:14:52,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 01:14:52,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:14:52,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:14:52,728 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:14:52,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257617974] [2022-11-26 01:14:52,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257617974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:14:52,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:14:52,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:14:52,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576667332] [2022-11-26 01:14:52,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:14:52,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:14:52,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:14:52,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:14:52,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:14:52,730 INFO L87 Difference]: Start difference. First operand 3307 states and 13314 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:14:53,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:14:53,053 INFO L93 Difference]: Finished difference Result 2523 states and 10098 transitions. [2022-11-26 01:14:53,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:14:53,054 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-26 01:14:53,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:14:53,061 INFO L225 Difference]: With dead ends: 2523 [2022-11-26 01:14:53,061 INFO L226 Difference]: Without dead ends: 2523 [2022-11-26 01:14:53,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:14:53,062 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 97 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:14:53,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 0 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:14:53,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2523 states. [2022-11-26 01:14:53,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2523 to 2523. [2022-11-26 01:14:53,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2523 states, 2380 states have (on average 4.242857142857143) internal successors, (10098), 2522 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:14:53,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2523 states to 2523 states and 10098 transitions. [2022-11-26 01:14:53,132 INFO L78 Accepts]: Start accepts. Automaton has 2523 states and 10098 transitions. Word has length 9 [2022-11-26 01:14:53,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:14:53,133 INFO L495 AbstractCegarLoop]: Abstraction has 2523 states and 10098 transitions. [2022-11-26 01:14:53,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:14:53,133 INFO L276 IsEmpty]: Start isEmpty. Operand 2523 states and 10098 transitions. [2022-11-26 01:14:53,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 01:14:53,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:14:53,134 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:14:53,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-26 01:14:53,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:14:53,341 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 01:14:53,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:14:53,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1453746305, now seen corresponding path program 1 times [2022-11-26 01:14:53,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:14:53,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017921808] [2022-11-26 01:14:53,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:14:53,346 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:14:53,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:14:53,349 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:14:53,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-26 01:14:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:14:53,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-26 01:14:53,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:14:53,706 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 01:14:53,706 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 [2022-11-26 01:14:53,845 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-26 01:14:53,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-26 01:14:53,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:53,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:14:54,020 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 01:14:54,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-26 01:14:54,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:54,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:14:54,102 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 01:14:54,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 01:14:54,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:14:54,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:14:55,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:14:55,118 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:14:55,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017921808] [2022-11-26 01:14:55,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017921808] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:14:55,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1010701331] [2022-11-26 01:14:55,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:14:55,119 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:14:55,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:14:55,120 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:14:55,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-26 01:14:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:14:55,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 01:14:55,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:14:55,546 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 01:14:55,546 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 [2022-11-26 01:14:55,682 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-26 01:14:55,683 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 [2022-11-26 01:14:55,887 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 01:14:55,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-26 01:14:55,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:14:55,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:55,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:14:55,982 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 01:14:55,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 01:14:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:14:56,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:14:56,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:14:56,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1010701331] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:14:56,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317638453] [2022-11-26 01:14:56,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:14:56,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:14:56,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:14:56,507 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:14:56,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-26 01:14:56,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:14:56,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 01:14:56,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:14:56,781 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 01:14:56,781 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 [2022-11-26 01:14:56,919 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 01:14:56,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-26 01:14:56,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:14:56,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:56,987 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 [2022-11-26 01:14:57,006 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 01:14:57,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 01:14:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:14:57,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:14:57,792 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:14:57,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 172 [2022-11-26 01:15:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:15:01,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317638453] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:15:01,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 01:15:01,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2022-11-26 01:15:01,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061825167] [2022-11-26 01:15:01,746 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 01:15:01,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-26 01:15:01,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:15:01,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-26 01:15:01,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=189, Unknown=1, NotChecked=0, Total=240 [2022-11-26 01:15:01,747 INFO L87 Difference]: Start difference. First operand 2523 states and 10098 transitions. Second operand has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:15:32,501 WARN L233 SmtUtils]: Spent 30.27s on a formula simplification. DAG size of input: 50 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:15:59,528 WARN L233 SmtUtils]: Spent 25.53s on a formula simplification. DAG size of input: 67 DAG size of output: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:16:27,497 WARN L233 SmtUtils]: Spent 26.67s on a formula simplification. DAG size of input: 67 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:16:37,642 WARN L233 SmtUtils]: Spent 6.48s on a formula simplification. DAG size of input: 49 DAG size of output: 45 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:17:05,722 WARN L233 SmtUtils]: Spent 26.97s on a formula simplification. DAG size of input: 69 DAG size of output: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:17:43,702 WARN L233 SmtUtils]: Spent 29.25s on a formula simplification. DAG size of input: 73 DAG size of output: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:18:02,843 WARN L233 SmtUtils]: Spent 18.50s on a formula simplification. DAG size of input: 66 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:18:22,273 WARN L233 SmtUtils]: Spent 12.01s on a formula simplification. DAG size of input: 72 DAG size of output: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:18:50,641 WARN L233 SmtUtils]: Spent 26.90s on a formula simplification. DAG size of input: 73 DAG size of output: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:19:18,143 WARN L233 SmtUtils]: Spent 25.27s on a formula simplification. DAG size of input: 59 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:19:29,759 WARN L233 SmtUtils]: Spent 10.89s on a formula simplification. DAG size of input: 72 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:19:37,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:19:37,865 INFO L93 Difference]: Finished difference Result 37170 states and 149045 transitions. [2022-11-26 01:19:37,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-26 01:19:37,866 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-26 01:19:37,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:19:38,006 INFO L225 Difference]: With dead ends: 37170 [2022-11-26 01:19:38,006 INFO L226 Difference]: Without dead ends: 37170 [2022-11-26 01:19:38,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 269.2s TimeCoverageRelationStatistics Valid=500, Invalid=1479, Unknown=1, NotChecked=0, Total=1980 [2022-11-26 01:19:38,007 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2522 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2522 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:19:38,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2522 Valid, 0 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1462 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2022-11-26 01:19:38,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37170 states. [2022-11-26 01:19:38,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37170 to 2705. [2022-11-26 01:19:38,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2705 states, 2582 states have (on average 4.409372579395817) internal successors, (11385), 2704 states have internal predecessors, (11385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:19:38,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2705 states to 2705 states and 11385 transitions. [2022-11-26 01:19:38,313 INFO L78 Accepts]: Start accepts. Automaton has 2705 states and 11385 transitions. Word has length 9 [2022-11-26 01:19:38,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:19:38,313 INFO L495 AbstractCegarLoop]: Abstraction has 2705 states and 11385 transitions. [2022-11-26 01:19:38,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:19:38,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2705 states and 11385 transitions. [2022-11-26 01:19:38,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 01:19:38,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:19:38,314 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:19:38,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-26 01:19:38,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-26 01:19:38,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-26 01:19:38,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:19:38,917 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 01:19:38,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:19:38,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1453746514, now seen corresponding path program 1 times [2022-11-26 01:19:38,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:19:38,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237129705] [2022-11-26 01:19:38,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:19:38,921 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:19:38,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:19:38,922 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:19:38,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-26 01:19:39,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:19:39,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 01:19:39,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:19:39,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-26 01:19:39,207 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 01:19:39,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-26 01:19:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:19:39,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:19:39,225 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:19:39,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237129705] [2022-11-26 01:19:39,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237129705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:19:39,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:19:39,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:19:39,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668056021] [2022-11-26 01:19:39,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:19:39,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:19:39,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:19:39,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:19:39,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:19:39,226 INFO L87 Difference]: Start difference. First operand 2705 states and 11385 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:19:39,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:19:39,565 INFO L93 Difference]: Finished difference Result 2067 states and 8632 transitions. [2022-11-26 01:19:39,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:19:39,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-26 01:19:39,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:19:39,570 INFO L225 Difference]: With dead ends: 2067 [2022-11-26 01:19:39,570 INFO L226 Difference]: Without dead ends: 2067 [2022-11-26 01:19:39,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:19:39,571 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 88 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:19:39,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 0 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:19:39,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2022-11-26 01:19:39,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 2067. [2022-11-26 01:19:39,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 2004 states have (on average 4.307385229540918) internal successors, (8632), 2066 states have internal predecessors, (8632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:19:39,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 8632 transitions. [2022-11-26 01:19:39,605 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 8632 transitions. Word has length 9 [2022-11-26 01:19:39,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:19:39,605 INFO L495 AbstractCegarLoop]: Abstraction has 2067 states and 8632 transitions. [2022-11-26 01:19:39,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:19:39,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 8632 transitions. [2022-11-26 01:19:39,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 01:19:39,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:19:39,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:19:39,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-26 01:19:39,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:19:39,820 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 01:19:39,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:19:39,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1453746515, now seen corresponding path program 1 times [2022-11-26 01:19:39,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:19:39,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703470223] [2022-11-26 01:19:39,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:19:39,823 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:19:39,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:19:39,826 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:19:39,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-26 01:19:40,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:19:40,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 01:19:40,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:19:40,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 01:19:40,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-26 01:19:40,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:19:40,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:19:40,198 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 01:19:40,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 01:19:40,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:19:40,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:19:42,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:19:42,789 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:19:42,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703470223] [2022-11-26 01:19:42,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703470223] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:19:42,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1812656682] [2022-11-26 01:19:42,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:19:42,789 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:19:42,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:19:42,791 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:19:42,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-26 01:19:43,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:19:43,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 01:19:43,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:19:43,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-26 01:19:43,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 01:19:43,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:19:43,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:19:43,252 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 01:19:43,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 01:19:43,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:19:43,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:19:43,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:19:43,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1812656682] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:19:43,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472442223] [2022-11-26 01:19:43,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:19:43,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:19:43,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:19:43,551 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:19:43,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-26 01:19:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:19:43,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 01:19:43,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:19:43,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-26 01:19:43,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 01:19:43,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:19:43,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:19:43,809 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 01:19:43,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 01:19:43,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:19:43,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:19:44,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:19:44,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472442223] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:19:44,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 01:19:44,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 11 [2022-11-26 01:19:44,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173120403] [2022-11-26 01:19:44,077 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 01:19:44,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 01:19:44,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:19:44,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 01:19:44,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-26 01:19:44,079 INFO L87 Difference]: Start difference. First operand 2067 states and 8632 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 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) [2022-11-26 01:20:00,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:20:00,648 INFO L93 Difference]: Finished difference Result 28939 states and 118273 transitions. [2022-11-26 01:20:00,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-26 01:20:00,649 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 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 9 [2022-11-26 01:20:00,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:20:00,754 INFO L225 Difference]: With dead ends: 28939 [2022-11-26 01:20:00,754 INFO L226 Difference]: Without dead ends: 28939 [2022-11-26 01:20:00,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=357, Invalid=1125, Unknown=0, NotChecked=0, Total=1482 [2022-11-26 01:20:00,755 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1383 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1433 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1383 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:20:00,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1383 Valid, 0 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1433 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-11-26 01:20:00,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28939 states. [2022-11-26 01:20:00,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28939 to 2491. [2022-11-26 01:20:00,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2491 states, 2443 states have (on average 4.470323372902169) internal successors, (10921), 2490 states have internal predecessors, (10921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:20:01,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2491 states to 2491 states and 10921 transitions. [2022-11-26 01:20:01,002 INFO L78 Accepts]: Start accepts. Automaton has 2491 states and 10921 transitions. Word has length 9 [2022-11-26 01:20:01,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:20:01,003 INFO L495 AbstractCegarLoop]: Abstraction has 2491 states and 10921 transitions. [2022-11-26 01:20:01,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 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) [2022-11-26 01:20:01,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2491 states and 10921 transitions. [2022-11-26 01:20:01,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 01:20:01,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:20:01,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:20:01,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-26 01:20:01,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-26 01:20:01,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-26 01:20:01,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 01:20:01,606 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 01:20:01,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:20:01,608 INFO L85 PathProgramCache]: Analyzing trace with hash -849346041, now seen corresponding path program 1 times [2022-11-26 01:20:01,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:20:01,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1856956097] [2022-11-26 01:20:01,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:20:01,610 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:20:01,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:20:01,611 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:20:01,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-26 01:20:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:20:01,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 01:20:01,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:20:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:20:01,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:20:01,839 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:20:01,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1856956097] [2022-11-26 01:20:01,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1856956097] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:20:01,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:20:01,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:20:01,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862127138] [2022-11-26 01:20:01,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:20:01,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:20:01,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:20:01,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:20:01,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:20:01,841 INFO L87 Difference]: Start difference. First operand 2491 states and 10921 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:20:02,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:20:02,646 INFO L93 Difference]: Finished difference Result 3459 states and 14647 transitions. [2022-11-26 01:20:02,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:20:02,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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 [2022-11-26 01:20:02,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:20:02,655 INFO L225 Difference]: With dead ends: 3459 [2022-11-26 01:20:02,655 INFO L226 Difference]: Without dead ends: 3459 [2022-11-26 01:20:02,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:20:02,656 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 84 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 01:20:02,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 5 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 01:20:02,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3459 states. [2022-11-26 01:20:02,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3459 to 2833. [2022-11-26 01:20:02,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2833 states, 2785 states have (on average 4.501615798922801) internal successors, (12537), 2832 states have internal predecessors, (12537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:20:02,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 12537 transitions. [2022-11-26 01:20:02,702 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 12537 transitions. Word has length 10 [2022-11-26 01:20:02,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:20:02,703 INFO L495 AbstractCegarLoop]: Abstraction has 2833 states and 12537 transitions. [2022-11-26 01:20:02,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:20:02,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 12537 transitions. [2022-11-26 01:20:02,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 01:20:02,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:20:02,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:20:02,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-26 01:20:02,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:20:02,907 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 01:20:02,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:20:02,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1285497160, now seen corresponding path program 1 times [2022-11-26 01:20:02,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:20:02,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [278187736] [2022-11-26 01:20:02,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:20:02,910 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:20:02,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:20:02,913 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:20:02,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-26 01:20:03,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:20:03,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 01:20:03,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:20:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:20:03,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:20:03,218 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:20:03,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [278187736] [2022-11-26 01:20:03,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [278187736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:20:03,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:20:03,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:20:03,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716226259] [2022-11-26 01:20:03,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:20:03,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:20:03,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:20:03,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:20:03,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:20:03,220 INFO L87 Difference]: Start difference. First operand 2833 states and 12537 transitions. Second operand has 5 states, 4 states have (on average 2.75) 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) [2022-11-26 01:20:03,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:20:03,980 INFO L93 Difference]: Finished difference Result 3119 states and 13215 transitions. [2022-11-26 01:20:03,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:20:03,980 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) 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 [2022-11-26 01:20:03,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:20:03,989 INFO L225 Difference]: With dead ends: 3119 [2022-11-26 01:20:03,989 INFO L226 Difference]: Without dead ends: 3119 [2022-11-26 01:20:03,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:20:03,989 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 49 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 01:20:03,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 3 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 01:20:03,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3119 states. [2022-11-26 01:20:04,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3119 to 2942. [2022-11-26 01:20:04,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2942 states, 2894 states have (on average 4.413614374568072) internal successors, (12773), 2941 states have internal predecessors, (12773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:20:04,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2942 states to 2942 states and 12773 transitions. [2022-11-26 01:20:04,036 INFO L78 Accepts]: Start accepts. Automaton has 2942 states and 12773 transitions. Word has length 11 [2022-11-26 01:20:04,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:20:04,036 INFO L495 AbstractCegarLoop]: Abstraction has 2942 states and 12773 transitions. [2022-11-26 01:20:04,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) 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) [2022-11-26 01:20:04,037 INFO L276 IsEmpty]: Start isEmpty. Operand 2942 states and 12773 transitions. [2022-11-26 01:20:04,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 01:20:04,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:20:04,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:20:04,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-26 01:20:04,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:20:04,243 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 01:20:04,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:20:04,245 INFO L85 PathProgramCache]: Analyzing trace with hash -492174103, now seen corresponding path program 1 times [2022-11-26 01:20:04,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:20:04,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [792464621] [2022-11-26 01:20:04,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:20:04,247 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:20:04,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:20:04,251 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:20:04,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-26 01:20:04,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:20:04,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-26 01:20:04,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:20:04,632 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 01:20:04,632 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 [2022-11-26 01:20:04,767 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-26 01:20:04,767 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 [2022-11-26 01:20:04,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:20:04,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:20:04,894 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 01:20:04,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 01:20:04,960 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-26 01:20:04,960 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 22 [2022-11-26 01:20:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:20:05,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:20:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:20:06,540 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:20:06,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [792464621] [2022-11-26 01:20:06,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [792464621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:20:06,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1139622560] [2022-11-26 01:20:06,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:20:06,540 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:20:06,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:20:06,542 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:20:06,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-26 01:20:06,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:20:06,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-26 01:20:06,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:20:06,984 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 01:20:06,985 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 [2022-11-26 01:20:07,121 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-26 01:20:07,122 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 [2022-11-26 01:20:07,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:20:07,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:20:07,352 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 01:20:07,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 01:20:07,397 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-26 01:20:07,397 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 22 [2022-11-26 01:20:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:20:07,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:20:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:20:08,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1139622560] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:20:08,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873370228] [2022-11-26 01:20:08,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:20:08,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:20:08,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:20:08,558 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:20:08,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-26 01:20:08,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:20:08,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-26 01:20:08,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:20:08,879 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 01:20:08,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 01:20:08,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:20:08,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:20:09,019 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 01:20:09,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 01:20:09,071 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-26 01:20:09,071 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 22 [2022-11-26 01:20:09,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:20:09,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:20:09,931 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:20:09,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 75 [2022-11-26 01:20:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:20:12,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873370228] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:20:12,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 01:20:12,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7, 6, 7] total 19 [2022-11-26 01:20:12,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015200065] [2022-11-26 01:20:12,283 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 01:20:12,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-26 01:20:12,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:20:12,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-26 01:20:12,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=341, Unknown=1, NotChecked=0, Total=420 [2022-11-26 01:20:12,284 INFO L87 Difference]: Start difference. First operand 2942 states and 12773 transitions. Second operand has 21 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:20:42,012 WARN L233 SmtUtils]: Spent 29.10s on a formula simplification. DAG size of input: 47 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:21:16,456 WARN L233 SmtUtils]: Spent 32.63s on a formula simplification. DAG size of input: 59 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:21:18,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:21:49,023 WARN L233 SmtUtils]: Spent 26.87s on a formula simplification. DAG size of input: 55 DAG size of output: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:22:58,862 WARN L233 SmtUtils]: Spent 1.12m on a formula simplification. DAG size of input: 57 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:23:01,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-26 01:23:02,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:23:17,113 WARN L233 SmtUtils]: Spent 14.31s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:23:30,571 WARN L233 SmtUtils]: Spent 12.68s on a formula simplification. DAG size of input: 54 DAG size of output: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:23:50,892 WARN L233 SmtUtils]: Spent 19.02s on a formula simplification. DAG size of input: 56 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:23:53,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-26 01:24:27,727 WARN L233 SmtUtils]: Spent 31.97s on a formula simplification. DAG size of input: 64 DAG size of output: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:24:44,688 WARN L233 SmtUtils]: Spent 7.60s on a formula simplification. DAG size of input: 63 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:25:20,930 WARN L233 SmtUtils]: Spent 32.91s 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) [2022-11-26 01:25:35,181 WARN L233 SmtUtils]: Spent 9.17s on a formula simplification. DAG size of input: 60 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:25:40,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:25:40,565 INFO L93 Difference]: Finished difference Result 17161 states and 70399 transitions. [2022-11-26 01:25:40,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-26 01:25:40,566 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-26 01:25:40,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:25:40,617 INFO L225 Difference]: With dead ends: 17161 [2022-11-26 01:25:40,617 INFO L226 Difference]: Without dead ends: 17161 [2022-11-26 01:25:40,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 309.3s TimeCoverageRelationStatistics Valid=526, Invalid=1920, Unknown=4, NotChecked=0, Total=2450 [2022-11-26 01:25:40,618 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1634 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1919 mSolverCounterSat, 101 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1634 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1919 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:25:40,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1634 Valid, 0 Invalid, 2021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1919 Invalid, 1 Unknown, 0 Unchecked, 23.6s Time] [2022-11-26 01:25:40,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17161 states. [2022-11-26 01:25:40,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17161 to 3152. [2022-11-26 01:25:40,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3152 states, 3113 states have (on average 4.423385801477674) internal successors, (13770), 3151 states have internal predecessors, (13770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:25:40,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3152 states to 3152 states and 13770 transitions. [2022-11-26 01:25:40,765 INFO L78 Accepts]: Start accepts. Automaton has 3152 states and 13770 transitions. Word has length 11 [2022-11-26 01:25:40,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:25:40,765 INFO L495 AbstractCegarLoop]: Abstraction has 3152 states and 13770 transitions. [2022-11-26 01:25:40,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:25:40,765 INFO L276 IsEmpty]: Start isEmpty. Operand 3152 states and 13770 transitions. [2022-11-26 01:25:40,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 01:25:40,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:25:40,766 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:25:40,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-26 01:25:40,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-11-26 01:25:41,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-26 01:25:41,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:25:41,369 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 01:25:41,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:25:41,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1185868735, now seen corresponding path program 1 times [2022-11-26 01:25:41,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:25:41,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853390088] [2022-11-26 01:25:41,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:25:41,373 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:25:41,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:25:41,374 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:25:41,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-26 01:25:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:25:41,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 01:25:41,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:25:41,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:25:41,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:25:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:25:41,886 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:25:41,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853390088] [2022-11-26 01:25:41,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853390088] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:25:41,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [705002797] [2022-11-26 01:25:41,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:25:41,887 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:25:41,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:25:41,891 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:25:41,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-26 01:25:42,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:25:42,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 01:25:42,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:25:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:25:42,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:25:42,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:25:42,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [705002797] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:25:42,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289334393] [2022-11-26 01:25:42,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:25:42,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:25:42,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:25:42,621 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:25:42,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-26 01:25:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:25:42,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 01:25:42,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:25:42,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:25:42,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:25:42,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:25:42,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289334393] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:25:42,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 01:25:42,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 5, 5] total 21 [2022-11-26 01:25:42,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205349514] [2022-11-26 01:25:42,897 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 01:25:42,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-26 01:25:42,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:25:42,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-26 01:25:42,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-11-26 01:25:42,900 INFO L87 Difference]: Start difference. First operand 3152 states and 13770 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:25:53,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:25:53,336 INFO L93 Difference]: Finished difference Result 11451 states and 44572 transitions. [2022-11-26 01:25:53,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-26 01:25:53,337 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 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 [2022-11-26 01:25:53,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:25:53,365 INFO L225 Difference]: With dead ends: 11451 [2022-11-26 01:25:53,365 INFO L226 Difference]: Without dead ends: 11451 [2022-11-26 01:25:53,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=542, Invalid=2214, Unknown=0, NotChecked=0, Total=2756 [2022-11-26 01:25:53,366 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1286 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3301 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1286 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 3301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-11-26 01:25:53,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1286 Valid, 0 Invalid, 3331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 3301 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2022-11-26 01:25:53,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11451 states. [2022-11-26 01:25:53,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11451 to 4715. [2022-11-26 01:25:53,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4715 states, 4676 states have (on average 4.5863986313088105) internal successors, (21446), 4714 states have internal predecessors, (21446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:25:53,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4715 states to 4715 states and 21446 transitions. [2022-11-26 01:25:53,490 INFO L78 Accepts]: Start accepts. Automaton has 4715 states and 21446 transitions. Word has length 11 [2022-11-26 01:25:53,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:25:53,490 INFO L495 AbstractCegarLoop]: Abstraction has 4715 states and 21446 transitions. [2022-11-26 01:25:53,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:25:53,490 INFO L276 IsEmpty]: Start isEmpty. Operand 4715 states and 21446 transitions. [2022-11-26 01:25:53,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 01:25:53,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:25:53,492 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:25:53,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-11-26 01:25:53,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-26 01:25:53,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-26 01:25:54,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:25:54,096 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 01:25:54,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:25:54,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1777401697, now seen corresponding path program 1 times [2022-11-26 01:25:54,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:25:54,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [815585364] [2022-11-26 01:25:54,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:25:54,100 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:25:54,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:25:54,112 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:25:54,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-26 01:25:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:25:54,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 01:25:54,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:25:54,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:25:54,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:25:54,433 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:25:54,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [815585364] [2022-11-26 01:25:54,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [815585364] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:25:54,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:25:54,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:25:54,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725730569] [2022-11-26 01:25:54,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:25:54,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:25:54,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:25:54,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:25:54,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:25:54,435 INFO L87 Difference]: Start difference. First operand 4715 states and 21446 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:25:55,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:25:55,190 INFO L93 Difference]: Finished difference Result 5057 states and 22176 transitions. [2022-11-26 01:25:55,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:25:55,191 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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 [2022-11-26 01:25:55,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:25:55,203 INFO L225 Difference]: With dead ends: 5057 [2022-11-26 01:25:55,203 INFO L226 Difference]: Without dead ends: 5057 [2022-11-26 01:25:55,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:25:55,204 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 72 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 01:25:55,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 5 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 01:25:55,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5057 states. [2022-11-26 01:25:55,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5057 to 4671. [2022-11-26 01:25:55,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4671 states, 4632 states have (on average 4.525906735751295) internal successors, (20964), 4670 states have internal predecessors, (20964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:25:55,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4671 states to 4671 states and 20964 transitions. [2022-11-26 01:25:55,286 INFO L78 Accepts]: Start accepts. Automaton has 4671 states and 20964 transitions. Word has length 12 [2022-11-26 01:25:55,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:25:55,286 INFO L495 AbstractCegarLoop]: Abstraction has 4671 states and 20964 transitions. [2022-11-26 01:25:55,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:25:55,286 INFO L276 IsEmpty]: Start isEmpty. Operand 4671 states and 20964 transitions. [2022-11-26 01:25:55,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 01:25:55,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:25:55,287 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:25:55,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-11-26 01:25:55,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:25:55,489 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 01:25:55,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:25:55,490 INFO L85 PathProgramCache]: Analyzing trace with hash 318092874, now seen corresponding path program 2 times [2022-11-26 01:25:55,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:25:55,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [22246623] [2022-11-26 01:25:55,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 01:25:55,492 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:25:55,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:25:55,497 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:25:55,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-26 01:25:55,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-26 01:25:55,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:25:55,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 01:25:55,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:25:55,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-26 01:25:55,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 01:25:55,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:25:55,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:25:55,821 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 01:25:55,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 01:25:55,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 01:25:55,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:25:55,893 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:25:55,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [22246623] [2022-11-26 01:25:55,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [22246623] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:25:55,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:25:55,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:25:55,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464332618] [2022-11-26 01:25:55,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:25:55,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:25:55,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:25:55,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:25:55,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:25:55,895 INFO L87 Difference]: Start difference. First operand 4671 states and 20964 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:25:56,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:25:56,645 INFO L93 Difference]: Finished difference Result 6013 states and 25880 transitions. [2022-11-26 01:25:56,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:25:56,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-26 01:25:56,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:25:56,661 INFO L225 Difference]: With dead ends: 6013 [2022-11-26 01:25:56,661 INFO L226 Difference]: Without dead ends: 6013 [2022-11-26 01:25:56,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:25:56,662 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 81 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 01:25:56,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 0 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 01:25:56,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6013 states. [2022-11-26 01:25:56,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6013 to 3852. [2022-11-26 01:25:56,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3852 states, 3813 states have (on average 4.398111723052715) internal successors, (16770), 3851 states have internal predecessors, (16770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:25:56,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3852 states to 3852 states and 16770 transitions. [2022-11-26 01:25:56,747 INFO L78 Accepts]: Start accepts. Automaton has 3852 states and 16770 transitions. Word has length 12 [2022-11-26 01:25:56,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:25:56,747 INFO L495 AbstractCegarLoop]: Abstraction has 3852 states and 16770 transitions. [2022-11-26 01:25:56,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:25:56,748 INFO L276 IsEmpty]: Start isEmpty. Operand 3852 states and 16770 transitions. [2022-11-26 01:25:56,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 01:25:56,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:25:56,749 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:25:56,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-26 01:25:56,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:25:56,951 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 01:25:56,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:25:56,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1990340384, now seen corresponding path program 2 times [2022-11-26 01:25:56,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:25:56,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834427951] [2022-11-26 01:25:56,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 01:25:56,955 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:25:56,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:25:56,966 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:25:56,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-26 01:25:57,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-26 01:25:57,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:25:57,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 01:25:57,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:25:57,286 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 01:25:57,286 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 [2022-11-26 01:25:57,434 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-26 01:25:57,434 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 [2022-11-26 01:25:57,574 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 01:25:57,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-26 01:25:57,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:25:57,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:25:57,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:25:57,651 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 01:25:57,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 01:25:57,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 01:25:57,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:25:57,725 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:25:57,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834427951] [2022-11-26 01:25:57,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834427951] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:25:57,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:25:57,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:25:57,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487149377] [2022-11-26 01:25:57,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:25:57,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:25:57,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:25:57,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:25:57,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:25:57,726 INFO L87 Difference]: Start difference. First operand 3852 states and 16770 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:25:58,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:25:58,478 INFO L93 Difference]: Finished difference Result 4902 states and 20438 transitions. [2022-11-26 01:25:58,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:25:58,479 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-26 01:25:58,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:25:58,491 INFO L225 Difference]: With dead ends: 4902 [2022-11-26 01:25:58,491 INFO L226 Difference]: Without dead ends: 4902 [2022-11-26 01:25:58,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:25:58,492 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 124 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 01:25:58,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 0 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 01:25:58,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4902 states. [2022-11-26 01:25:58,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4902 to 3248. [2022-11-26 01:25:58,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 3209 states have (on average 4.2380803988781555) internal successors, (13600), 3247 states have internal predecessors, (13600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:25:58,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 13600 transitions. [2022-11-26 01:25:58,552 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 13600 transitions. Word has length 12 [2022-11-26 01:25:58,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:25:58,552 INFO L495 AbstractCegarLoop]: Abstraction has 3248 states and 13600 transitions. [2022-11-26 01:25:58,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:25:58,552 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 13600 transitions. [2022-11-26 01:25:58,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 01:25:58,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:25:58,553 INFO L195 NwaCegarLoop]: trace histogram [9, 1, 1, 1, 1] [2022-11-26 01:25:58,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-26 01:25:58,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:25:58,755 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-26 01:25:58,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:25:58,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1983817291, now seen corresponding path program 1 times [2022-11-26 01:25:58,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:25:58,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [712483803] [2022-11-26 01:25:58,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:25:58,758 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:25:58,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:25:58,761 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:25:58,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-26 01:25:58,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:25:58,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 01:25:58,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:25:58,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 01:25:59,403 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:25:59,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:26:02,385 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:26:02,386 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:26:02,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [712483803] [2022-11-26 01:26:02,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [712483803] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:26:02,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2110020616] [2022-11-26 01:26:02,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:26:02,387 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:26:02,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:26:02,389 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:26:02,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-26 01:26:02,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:26:02,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 01:26:02,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:26:02,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 01:26:03,400 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:26:03,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:26:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:26:07,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2110020616] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:26:07,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39049302] [2022-11-26 01:26:07,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:26:07,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:26:07,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:26:07,173 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:26:07,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_147b7f01-4695-4528-b906-e3c66e28a36d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-26 01:26:07,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:26:07,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 01:26:07,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:26:07,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 01:26:07,564 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:26:07,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:26:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:26:08,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39049302] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:26:08,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 01:26:08,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 39 [2022-11-26 01:26:08,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856711762] [2022-11-26 01:26:08,287 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 01:26:08,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-26 01:26:08,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:26:08,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-26 01:26:08,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=1105, Unknown=0, NotChecked=0, Total=1560 [2022-11-26 01:26:08,289 INFO L87 Difference]: Start difference. First operand 3248 states and 13600 transitions. Second operand has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:26:16,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:26:18,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:26:20,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:26:22,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:26:24,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:26:26,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:26:28,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:26:30,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:26:32,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:26:34,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:26:36,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:26:38,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:26:40,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:26:42,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:26:44,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:26:46,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:26:48,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:26:51,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:26:53,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []