./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 24c46cfa0dbb54d68ea1c1d9e6e82d14a582b1d00782b6decedd8126f489ee67 --- 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-6b4ec56 [2022-11-20 11:20:20,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:20:20,445 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:20:20,474 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:20:20,475 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:20:20,476 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:20:20,478 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:20:20,481 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:20:20,483 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:20:20,484 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:20:20,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:20:20,488 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:20:20,488 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:20:20,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:20:20,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:20:20,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:20:20,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:20:20,496 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:20:20,499 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:20:20,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:20:20,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:20:20,506 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:20:20,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:20:20,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:20:20,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:20:20,514 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:20:20,515 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:20:20,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:20:20,517 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:20:20,519 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:20:20,519 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:20:20,521 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:20:20,522 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:20:20,523 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:20:20,525 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:20:20,525 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:20:20,526 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:20:20,527 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:20:20,527 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:20:20,529 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:20:20,530 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:20:20,531 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 11:20:20,558 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:20:20,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:20:20,559 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:20:20,560 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:20:20,561 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:20:20,561 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:20:20,562 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:20:20,562 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:20:20,563 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:20:20,563 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:20:20,563 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:20:20,564 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 11:20:20,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:20:20,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:20:20,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:20:20,565 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 11:20:20,565 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 11:20:20,565 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 11:20:20,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:20:20,566 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 11:20:20,566 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:20:20,566 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:20:20,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:20:20,567 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:20:20,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:20:20,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:20:20,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:20:20,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:20:20,568 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:20:20,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:20:20,569 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_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24c46cfa0dbb54d68ea1c1d9e6e82d14a582b1d00782b6decedd8126f489ee67 [2022-11-20 11:20:20,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:20:21,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:20:21,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:20:21,043 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:20:21,043 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:20:21,045 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2022-11-20 11:20:24,977 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:20:25,291 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:20:25,292 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2022-11-20 11:20:25,305 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/data/1568c9ee0/2a56eab5317a47059e5c3ac4b682df1f/FLAG9322f4f27 [2022-11-20 11:20:25,364 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/data/1568c9ee0/2a56eab5317a47059e5c3ac4b682df1f [2022-11-20 11:20:25,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:20:25,371 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:20:25,375 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:20:25,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:20:25,387 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:20:25,388 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:20:25" (1/1) ... [2022-11-20 11:20:25,389 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@316046f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:20:25, skipping insertion in model container [2022-11-20 11:20:25,390 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:20:25" (1/1) ... [2022-11-20 11:20:25,427 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:20:25,464 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:20:25,722 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_876911b1-ec59-460e-97b4-128fdc7aee08/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c[3018,3031] [2022-11-20 11:20:25,734 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:20:25,748 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) [2022-11-20 11:20:25,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@15980697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:20:25, skipping insertion in model container [2022-11-20 11:20:25,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:20:25,750 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-20 11:20:25,752 INFO L158 Benchmark]: Toolchain (without parser) took 379.46ms. Allocated memory is still 163.6MB. Free memory was 137.1MB in the beginning and 127.1MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 11:20:25,752 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 121.6MB. Free memory is still 89.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 11:20:25,753 INFO L158 Benchmark]: CACSL2BoogieTranslator took 374.29ms. Allocated memory is still 163.6MB. Free memory was 137.1MB in the beginning and 127.1MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 11:20:25,755 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 121.6MB. Free memory is still 89.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 374.29ms. Allocated memory is still 163.6MB. Free memory was 137.1MB in the beginning and 127.1MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 129]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 24c46cfa0dbb54d68ea1c1d9e6e82d14a582b1d00782b6decedd8126f489ee67 --- 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-6b4ec56 [2022-11-20 11:20:28,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:20:28,635 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:20:28,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:20:28,686 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:20:28,691 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:20:28,695 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:20:28,699 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:20:28,702 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:20:28,709 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:20:28,711 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:20:28,713 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:20:28,714 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:20:28,717 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:20:28,719 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:20:28,725 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:20:28,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:20:28,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:20:28,733 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:20:28,737 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:20:28,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:20:28,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:20:28,746 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:20:28,748 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:20:28,756 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:20:28,761 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:20:28,762 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:20:28,763 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:20:28,765 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:20:28,767 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:20:28,767 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:20:28,769 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:20:28,771 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:20:28,794 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:20:28,797 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:20:28,798 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:20:28,799 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:20:28,799 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:20:28,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:20:28,801 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:20:28,802 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:20:28,803 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-20 11:20:28,855 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:20:28,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:20:28,858 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:20:28,858 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:20:28,859 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:20:28,860 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:20:28,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:20:28,861 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:20:28,861 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:20:28,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:20:28,863 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:20:28,863 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 11:20:28,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:20:28,864 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:20:28,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:20:28,864 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 11:20:28,865 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 11:20:28,865 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 11:20:28,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:20:28,866 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 11:20:28,866 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 11:20:28,866 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 11:20:28,866 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:20:28,867 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:20:28,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:20:28,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:20:28,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:20:28,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:20:28,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:20:28,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:20:28,869 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-20 11:20:28,869 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 11:20:28,870 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 11:20:28,870 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_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24c46cfa0dbb54d68ea1c1d9e6e82d14a582b1d00782b6decedd8126f489ee67 [2022-11-20 11:20:29,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:20:29,470 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:20:29,474 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:20:29,476 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:20:29,477 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:20:29,480 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2022-11-20 11:20:33,502 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:20:33,817 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:20:33,818 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2022-11-20 11:20:33,835 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/data/b3797d80f/b95d3adc743c4dee908867b3ebbb2d7b/FLAGf13d568ab [2022-11-20 11:20:33,860 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/data/b3797d80f/b95d3adc743c4dee908867b3ebbb2d7b [2022-11-20 11:20:33,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:20:33,866 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:20:33,870 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:20:33,870 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:20:33,874 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:20:33,875 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:20:33" (1/1) ... [2022-11-20 11:20:33,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@273bd3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:20:33, skipping insertion in model container [2022-11-20 11:20:33,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:20:33" (1/1) ... [2022-11-20 11:20:33,886 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:20:33,926 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:20:34,240 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_876911b1-ec59-460e-97b4-128fdc7aee08/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c[3018,3031] [2022-11-20 11:20:34,269 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:20:34,294 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-20 11:20:34,311 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:20:34,350 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_876911b1-ec59-460e-97b4-128fdc7aee08/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c[3018,3031] [2022-11-20 11:20:34,361 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:20:34,367 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:20:34,396 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_876911b1-ec59-460e-97b4-128fdc7aee08/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c[3018,3031] [2022-11-20 11:20:34,400 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:20:34,432 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:20:34,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:20:34 WrapperNode [2022-11-20 11:20:34,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:20:34,434 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:20:34,434 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:20:34,435 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:20:34,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:20:34" (1/1) ... [2022-11-20 11:20:34,464 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:20:34" (1/1) ... [2022-11-20 11:20:34,495 INFO L138 Inliner]: procedures = 28, calls = 63, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 135 [2022-11-20 11:20:34,496 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:20:34,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:20:34,497 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:20:34,497 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:20:34,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:20:34" (1/1) ... [2022-11-20 11:20:34,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:20:34" (1/1) ... [2022-11-20 11:20:34,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:20:34" (1/1) ... [2022-11-20 11:20:34,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:20:34" (1/1) ... [2022-11-20 11:20:34,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:20:34" (1/1) ... [2022-11-20 11:20:34,550 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:20:34" (1/1) ... [2022-11-20 11:20:34,565 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:20:34" (1/1) ... [2022-11-20 11:20:34,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:20:34" (1/1) ... [2022-11-20 11:20:34,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:20:34,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:20:34,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:20:34,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:20:34,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:20:34" (1/1) ... [2022-11-20 11:20:34,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:20:34,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:20:34,626 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:20:34,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:20:34,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:20:34,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 11:20:34,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:20:34,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-20 11:20:34,672 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 11:20:34,673 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 11:20:34,673 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 11:20:34,673 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 11:20:34,673 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 11:20:34,673 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 11:20:34,674 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-20 11:20:34,674 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-20 11:20:34,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 11:20:34,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 11:20:34,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 11:20:34,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:20:34,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:20:34,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:20:34,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-20 11:20:34,677 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 11:20:34,840 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:20:34,843 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:20:35,782 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:20:36,108 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:20:36,108 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-20 11:20:36,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:20:36 BoogieIcfgContainer [2022-11-20 11:20:36,112 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:20:36,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:20:36,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:20:36,119 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:20:36,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:20:33" (1/3) ... [2022-11-20 11:20:36,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70e56139 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:20:36, skipping insertion in model container [2022-11-20 11:20:36,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:20:34" (2/3) ... [2022-11-20 11:20:36,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70e56139 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:20:36, skipping insertion in model container [2022-11-20 11:20:36,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:20:36" (3/3) ... [2022-11-20 11:20:36,127 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-inc.wvr.c [2022-11-20 11:20:36,153 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:20:36,154 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2022-11-20 11:20:36,154 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:20:36,333 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-20 11:20:36,394 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 11:20:36,430 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 210 transitions, 452 flow [2022-11-20 11:20:36,440 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 210 transitions, 452 flow [2022-11-20 11:20:36,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 210 transitions, 452 flow [2022-11-20 11:20:36,623 INFO L130 PetriNetUnfolder]: 12/206 cut-off events. [2022-11-20 11:20:36,624 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-20 11:20:36,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 206 events. 12/206 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 278 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 161. Up to 2 conditions per place. [2022-11-20 11:20:36,640 INFO L119 LiptonReduction]: Number of co-enabled transitions 4948 [2022-11-20 11:21:18,449 WARN L233 SmtUtils]: Spent 7.96s on a formula simplification. DAG size of input: 134 DAG size of output: 133 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 11:21:22,099 INFO L134 LiptonReduction]: Checked pairs total: 8738 [2022-11-20 11:21:22,099 INFO L136 LiptonReduction]: Total number of compositions: 199 [2022-11-20 11:21:22,110 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 82 places, 73 transitions, 178 flow [2022-11-20 11:21:22,893 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 12050 states, 10104 states have (on average 4.84986144101346) internal successors, (49003), 12049 states have internal predecessors, (49003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:22,918 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:21:22,924 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;@76297705, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:21:22,924 INFO L358 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2022-11-20 11:21:22,959 INFO L276 IsEmpty]: Start isEmpty. Operand has 12050 states, 10104 states have (on average 4.84986144101346) internal successors, (49003), 12049 states have internal predecessors, (49003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:22,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 11:21:22,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:22,966 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 11:21:22,966 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:21:22,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:22,973 INFO L85 PathProgramCache]: Analyzing trace with hash 27476, now seen corresponding path program 1 times [2022-11-20 11:21:22,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:21:22,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499524769] [2022-11-20 11:21:22,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:22,990 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 [2022-11-20 11:21:22,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:21:23,004 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:21:23,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:21:23,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:23,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:21:23,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:23,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:21:23,348 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:21:23,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499524769] [2022-11-20 11:21:23,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1499524769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:21:23,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:21:23,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:21:23,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451509862] [2022-11-20 11:21:23,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:21:23,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:21:23,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:21:23,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:21:23,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:21:23,428 INFO L87 Difference]: Start difference. First operand has 12050 states, 10104 states have (on average 4.84986144101346) internal successors, (49003), 12049 states have internal predecessors, (49003), 0 states have call successors, (0), 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) [2022-11-20 11:21:24,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:24,093 INFO L93 Difference]: Finished difference Result 4508 states and 18077 transitions. [2022-11-20 11:21:24,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:21:24,098 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 [2022-11-20 11:21:24,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:24,234 INFO L225 Difference]: With dead ends: 4508 [2022-11-20 11:21:24,234 INFO L226 Difference]: Without dead ends: 4508 [2022-11-20 11:21:24,236 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 [2022-11-20 11:21:24,244 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:21:24,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:21:24,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4508 states. [2022-11-20 11:21:24,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4508 to 4506. [2022-11-20 11:21:24,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4506 states, 4029 states have (on average 4.486721270786796) internal successors, (18077), 4505 states have internal predecessors, (18077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:24,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4506 states to 4506 states and 18077 transitions. [2022-11-20 11:21:24,863 INFO L78 Accepts]: Start accepts. Automaton has 4506 states and 18077 transitions. Word has length 2 [2022-11-20 11:21:24,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:24,873 INFO L495 AbstractCegarLoop]: Abstraction has 4506 states and 18077 transitions. [2022-11-20 11:21:24,873 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) [2022-11-20 11:21:24,873 INFO L276 IsEmpty]: Start isEmpty. Operand 4506 states and 18077 transitions. [2022-11-20 11:21:24,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 11:21:24,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:24,874 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 11:21:24,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:21:25,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:21:25,075 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:21:25,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:25,077 INFO L85 PathProgramCache]: Analyzing trace with hash 27384, now seen corresponding path program 1 times [2022-11-20 11:21:25,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:21:25,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853868125] [2022-11-20 11:21:25,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:25,078 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:21:25,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:21:25,080 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:21:25,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:21:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:25,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:21:25,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:25,500 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 11:21:25,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 11:21:25,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:25,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:21:25,578 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:21:25,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853868125] [2022-11-20 11:21:25,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853868125] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:21:25,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:21:25,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:21:25,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743367031] [2022-11-20 11:21:25,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:21:25,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:21:25,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:21:25,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:21:25,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:21:25,583 INFO L87 Difference]: Start difference. First operand 4506 states and 18077 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) [2022-11-20 11:21:26,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:26,084 INFO L93 Difference]: Finished difference Result 4505 states and 18075 transitions. [2022-11-20 11:21:26,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:21:26,085 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 [2022-11-20 11:21:26,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:26,168 INFO L225 Difference]: With dead ends: 4505 [2022-11-20 11:21:26,169 INFO L226 Difference]: Without dead ends: 4505 [2022-11-20 11:21:26,169 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 [2022-11-20 11:21:26,171 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:21:26,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 3 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:21:26,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4505 states. [2022-11-20 11:21:26,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4505 to 4505. [2022-11-20 11:21:26,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4505 states, 4029 states have (on average 4.486224869694714) internal successors, (18075), 4504 states have internal predecessors, (18075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:26,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4505 states to 4505 states and 18075 transitions. [2022-11-20 11:21:26,618 INFO L78 Accepts]: Start accepts. Automaton has 4505 states and 18075 transitions. Word has length 2 [2022-11-20 11:21:26,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:26,618 INFO L495 AbstractCegarLoop]: Abstraction has 4505 states and 18075 transitions. [2022-11-20 11:21:26,619 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) [2022-11-20 11:21:26,620 INFO L276 IsEmpty]: Start isEmpty. Operand 4505 states and 18075 transitions. [2022-11-20 11:21:26,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 11:21:26,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:26,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 11:21:26,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:21:26,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:21:26,832 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:21:26,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:26,833 INFO L85 PathProgramCache]: Analyzing trace with hash 27385, now seen corresponding path program 1 times [2022-11-20 11:21:26,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:21:26,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772416909] [2022-11-20 11:21:26,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:26,834 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:21:26,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:21:26,837 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:21:26,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:21:26,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:26,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:21:26,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:27,202 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:21:27,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:21:27,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:27,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:21:27,255 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:21:27,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772416909] [2022-11-20 11:21:27,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772416909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:21:27,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:21:27,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:21:27,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729451789] [2022-11-20 11:21:27,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:21:27,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:21:27,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:21:27,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:21:27,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:21:27,257 INFO L87 Difference]: Start difference. First operand 4505 states and 18075 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) [2022-11-20 11:21:27,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:27,692 INFO L93 Difference]: Finished difference Result 4505 states and 18074 transitions. [2022-11-20 11:21:27,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:21:27,693 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 [2022-11-20 11:21:27,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:27,744 INFO L225 Difference]: With dead ends: 4505 [2022-11-20 11:21:27,745 INFO L226 Difference]: Without dead ends: 4505 [2022-11-20 11:21:27,745 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 [2022-11-20 11:21:27,746 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:21:27,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:21:27,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4505 states. [2022-11-20 11:21:27,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4505 to 4505. [2022-11-20 11:21:27,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4505 states, 4029 states have (on average 4.485976669148672) internal successors, (18074), 4504 states have internal predecessors, (18074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:27,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4505 states to 4505 states and 18074 transitions. [2022-11-20 11:21:27,997 INFO L78 Accepts]: Start accepts. Automaton has 4505 states and 18074 transitions. Word has length 2 [2022-11-20 11:21:27,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:27,997 INFO L495 AbstractCegarLoop]: Abstraction has 4505 states and 18074 transitions. [2022-11-20 11:21:27,997 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) [2022-11-20 11:21:27,997 INFO L276 IsEmpty]: Start isEmpty. Operand 4505 states and 18074 transitions. [2022-11-20 11:21:27,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 11:21:27,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:27,998 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 11:21:28,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-11-20 11:21:28,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:21:28,210 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:21:28,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:28,210 INFO L85 PathProgramCache]: Analyzing trace with hash 851797, now seen corresponding path program 1 times [2022-11-20 11:21:28,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:21:28,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490662617] [2022-11-20 11:21:28,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:28,212 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:21:28,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:21:28,213 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:21:28,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-20 11:21:28,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:28,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:21:28,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:28,477 INFO L321 Elim1Store]: treesize reduction 210, result has 13.6 percent of original size [2022-11-20 11:21:28,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 73 [2022-11-20 11:21:28,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:21:28,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:21:28,583 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:21:28,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1490662617] [2022-11-20 11:21:28,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1490662617] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:21:28,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:21:28,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:21:28,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349021552] [2022-11-20 11:21:28,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:21:28,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:21:28,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:21:28,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:21:28,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:21:28,586 INFO L87 Difference]: Start difference. First operand 4505 states and 18074 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:28,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:28,855 INFO L93 Difference]: Finished difference Result 4504 states and 18073 transitions. [2022-11-20 11:21:28,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:21:28,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 11:21:28,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:28,891 INFO L225 Difference]: With dead ends: 4504 [2022-11-20 11:21:28,891 INFO L226 Difference]: Without dead ends: 4504 [2022-11-20 11:21:28,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:21:28,895 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:21:28,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2022-11-20 11:21:28,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4504 states. [2022-11-20 11:21:29,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4504 to 4504. [2022-11-20 11:21:29,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4504 states, 4029 states have (on average 4.485728468602631) internal successors, (18073), 4503 states have internal predecessors, (18073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:29,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4504 states to 4504 states and 18073 transitions. [2022-11-20 11:21:29,183 INFO L78 Accepts]: Start accepts. Automaton has 4504 states and 18073 transitions. Word has length 3 [2022-11-20 11:21:29,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:29,184 INFO L495 AbstractCegarLoop]: Abstraction has 4504 states and 18073 transitions. [2022-11-20 11:21:29,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:29,185 INFO L276 IsEmpty]: Start isEmpty. Operand 4504 states and 18073 transitions. [2022-11-20 11:21:29,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 11:21:29,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:29,200 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 11:21:29,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:21:29,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:21:29,411 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:21:29,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:29,411 INFO L85 PathProgramCache]: Analyzing trace with hash 851798, now seen corresponding path program 1 times [2022-11-20 11:21:29,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:21:29,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174489628] [2022-11-20 11:21:29,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:29,412 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 [2022-11-20 11:21:29,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:21:29,416 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:21:29,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-20 11:21:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:29,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 11:21:29,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:29,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:21:29,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:21:29,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:21:29,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:21:29,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:21:29,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:21:29,802 INFO L321 Elim1Store]: treesize reduction 48, result has 43.5 percent of original size [2022-11-20 11:21:29,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 44 [2022-11-20 11:21:29,845 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-11-20 11:21:29,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2022-11-20 11:21:30,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:30,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:21:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:30,484 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:21:30,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174489628] [2022-11-20 11:21:30,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174489628] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:21:30,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:21:30,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-20 11:21:30,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980067173] [2022-11-20 11:21:30,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:21:30,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:21:30,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:21:30,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:21:30,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:21:30,486 INFO L87 Difference]: Start difference. First operand 4504 states and 18073 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2022-11-20 11:21:31,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:31,622 INFO L93 Difference]: Finished difference Result 4506 states and 18079 transitions. [2022-11-20 11:21:31,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:21:31,623 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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 3 [2022-11-20 11:21:31,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:31,663 INFO L225 Difference]: With dead ends: 4506 [2022-11-20 11:21:31,663 INFO L226 Difference]: Without dead ends: 4506 [2022-11-20 11:21:31,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:21:31,664 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 72 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:21:31,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 20 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 137 Invalid, 0 Unknown, 74 Unchecked, 0.8s Time] [2022-11-20 11:21:31,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4506 states. [2022-11-20 11:21:31,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4506 to 4506. [2022-11-20 11:21:31,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4506 states, 4031 states have (on average 4.484991317290995) internal successors, (18079), 4505 states have internal predecessors, (18079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:32,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4506 states to 4506 states and 18079 transitions. [2022-11-20 11:21:32,012 INFO L78 Accepts]: Start accepts. Automaton has 4506 states and 18079 transitions. Word has length 3 [2022-11-20 11:21:32,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:32,012 INFO L495 AbstractCegarLoop]: Abstraction has 4506 states and 18079 transitions. [2022-11-20 11:21:32,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2022-11-20 11:21:32,013 INFO L276 IsEmpty]: Start isEmpty. Operand 4506 states and 18079 transitions. [2022-11-20 11:21:32,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 11:21:32,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:32,013 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 11:21:32,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:21:32,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:21:32,225 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:21:32,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:32,226 INFO L85 PathProgramCache]: Analyzing trace with hash 851706, now seen corresponding path program 1 times [2022-11-20 11:21:32,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:21:32,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2131187264] [2022-11-20 11:21:32,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:32,227 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 [2022-11-20 11:21:32,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:21:32,228 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:21:32,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:21:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:32,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 11:21:32,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:32,538 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:21:32,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:21:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:32,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:21:32,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:32,835 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:21:32,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2131187264] [2022-11-20 11:21:32,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2131187264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:21:32,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:21:32,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-20 11:21:32,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534425481] [2022-11-20 11:21:32,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:21:32,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:21:32,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:21:32,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:21:32,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:21:32,838 INFO L87 Difference]: Start difference. First operand 4506 states and 18079 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2022-11-20 11:21:33,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:33,782 INFO L93 Difference]: Finished difference Result 9006 states and 36147 transitions. [2022-11-20 11:21:33,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:21:33,783 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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 3 [2022-11-20 11:21:33,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:33,833 INFO L225 Difference]: With dead ends: 9006 [2022-11-20 11:21:33,834 INFO L226 Difference]: Without dead ends: 9006 [2022-11-20 11:21:33,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:21:33,835 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 161 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:21:33,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 9 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 11:21:33,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9006 states. [2022-11-20 11:21:34,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9006 to 4507. [2022-11-20 11:21:34,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4507 states, 4032 states have (on average 4.484126984126984) internal successors, (18080), 4506 states have internal predecessors, (18080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:34,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4507 states to 4507 states and 18080 transitions. [2022-11-20 11:21:34,255 INFO L78 Accepts]: Start accepts. Automaton has 4507 states and 18080 transitions. Word has length 3 [2022-11-20 11:21:34,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:34,256 INFO L495 AbstractCegarLoop]: Abstraction has 4507 states and 18080 transitions. [2022-11-20 11:21:34,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2022-11-20 11:21:34,256 INFO L276 IsEmpty]: Start isEmpty. Operand 4507 states and 18080 transitions. [2022-11-20 11:21:34,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 11:21:34,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:34,256 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 11:21:34,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-11-20 11:21:34,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:21:34,466 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:21:34,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:34,466 INFO L85 PathProgramCache]: Analyzing trace with hash 818598779, now seen corresponding path program 1 times [2022-11-20 11:21:34,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:21:34,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489459204] [2022-11-20 11:21:34,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:34,467 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 [2022-11-20 11:21:34,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:21:34,468 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:21:34,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:21:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:34,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:21:34,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:34,720 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 11:21:34,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 11:21:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:21:34,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:21:34,755 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:21:34,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489459204] [2022-11-20 11:21:34,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489459204] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:21:34,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:21:34,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:21:34,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355380696] [2022-11-20 11:21:34,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:21:34,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:21:34,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:21:34,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:21:34,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:21:34,757 INFO L87 Difference]: Start difference. First operand 4507 states and 18080 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:35,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:35,001 INFO L93 Difference]: Finished difference Result 2139 states and 8460 transitions. [2022-11-20 11:21:35,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:21:35,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 11:21:35,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:35,011 INFO L225 Difference]: With dead ends: 2139 [2022-11-20 11:21:35,011 INFO L226 Difference]: Without dead ends: 2139 [2022-11-20 11:21:35,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:21:35,012 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 96 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:21:35,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 1 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:21:35,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2022-11-20 11:21:35,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 2139. [2022-11-20 11:21:35,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2139 states, 2005 states have (on average 4.219451371571072) internal successors, (8460), 2138 states have internal predecessors, (8460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:35,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 8460 transitions. [2022-11-20 11:21:35,081 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 8460 transitions. Word has length 5 [2022-11-20 11:21:35,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:35,081 INFO L495 AbstractCegarLoop]: Abstraction has 2139 states and 8460 transitions. [2022-11-20 11:21:35,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:35,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 8460 transitions. [2022-11-20 11:21:35,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 11:21:35,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:35,082 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 11:21:35,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:21:35,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:21:35,294 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:21:35,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:35,294 INFO L85 PathProgramCache]: Analyzing trace with hash 818598780, now seen corresponding path program 1 times [2022-11-20 11:21:35,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:21:35,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [617292067] [2022-11-20 11:21:35,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:35,295 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 [2022-11-20 11:21:35,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:21:35,296 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:21:35,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:21:35,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:35,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:21:35,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:35,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:35,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:21:35,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-20 11:21:35,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:35,668 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:21:35,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [617292067] [2022-11-20 11:21:35,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [617292067] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:21:35,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:21:35,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-20 11:21:35,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151453774] [2022-11-20 11:21:35,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:21:35,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:21:35,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:21:35,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:21:35,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:21:35,670 INFO L87 Difference]: Start difference. First operand 2139 states and 8460 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) [2022-11-20 11:21:36,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:36,390 INFO L93 Difference]: Finished difference Result 3054 states and 12003 transitions. [2022-11-20 11:21:36,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:21:36,390 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 5 [2022-11-20 11:21:36,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:36,400 INFO L225 Difference]: With dead ends: 3054 [2022-11-20 11:21:36,400 INFO L226 Difference]: Without dead ends: 3054 [2022-11-20 11:21:36,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:21:36,400 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 325 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:21:36,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 3 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:21:36,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3054 states. [2022-11-20 11:21:36,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3054 to 1531. [2022-11-20 11:21:36,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1463 states have (on average 4.1066302118933695) internal successors, (6008), 1530 states have internal predecessors, (6008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:36,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 6008 transitions. [2022-11-20 11:21:36,464 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 6008 transitions. Word has length 5 [2022-11-20 11:21:36,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:36,464 INFO L495 AbstractCegarLoop]: Abstraction has 1531 states and 6008 transitions. [2022-11-20 11:21:36,465 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) [2022-11-20 11:21:36,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 6008 transitions. [2022-11-20 11:21:36,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 11:21:36,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:36,465 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 11:21:36,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-11-20 11:21:36,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:21:36,677 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:21:36,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:36,677 INFO L85 PathProgramCache]: Analyzing trace with hash 818599008, now seen corresponding path program 1 times [2022-11-20 11:21:36,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:21:36,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1170676005] [2022-11-20 11:21:36,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:36,678 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 [2022-11-20 11:21:36,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:21:36,679 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:21:36,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:21:36,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:36,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:21:36,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:36,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:21:36,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:21:36,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:21:36,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:21:37,125 INFO L321 Elim1Store]: treesize reduction 74, result has 36.8 percent of original size [2022-11-20 11:21:37,126 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 4 case distinctions, treesize of input 20 treesize of output 50 [2022-11-20 11:21:37,200 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-20 11:21:37,201 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 308 treesize of output 303 [2022-11-20 11:21:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:37,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:21:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:38,208 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:21:38,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1170676005] [2022-11-20 11:21:38,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1170676005] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:21:38,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:21:38,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-20 11:21:38,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162230998] [2022-11-20 11:21:38,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:21:38,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:21:38,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:21:38,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:21:38,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:21:38,210 INFO L87 Difference]: Start difference. First operand 1531 states and 6008 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) [2022-11-20 11:21:39,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:39,154 INFO L93 Difference]: Finished difference Result 1535 states and 6016 transitions. [2022-11-20 11:21:39,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:21:39,155 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 5 [2022-11-20 11:21:39,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:39,161 INFO L225 Difference]: With dead ends: 1535 [2022-11-20 11:21:39,163 INFO L226 Difference]: Without dead ends: 1535 [2022-11-20 11:21:39,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:21:39,166 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:21:39,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 9 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 143 Invalid, 0 Unknown, 100 Unchecked, 0.8s Time] [2022-11-20 11:21:39,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2022-11-20 11:21:39,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1533. [2022-11-20 11:21:39,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1465 states have (on average 4.103754266211604) internal successors, (6012), 1532 states have internal predecessors, (6012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:39,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 6012 transitions. [2022-11-20 11:21:39,235 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 6012 transitions. Word has length 5 [2022-11-20 11:21:39,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:39,235 INFO L495 AbstractCegarLoop]: Abstraction has 1533 states and 6012 transitions. [2022-11-20 11:21:39,235 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) [2022-11-20 11:21:39,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 6012 transitions. [2022-11-20 11:21:39,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 11:21:39,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:39,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 11:21:39,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:21:39,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:21:39,449 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:21:39,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:39,450 INFO L85 PathProgramCache]: Analyzing trace with hash 818599009, now seen corresponding path program 1 times [2022-11-20 11:21:39,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:21:39,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1254089550] [2022-11-20 11:21:39,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:39,450 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:21:39,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:21:39,452 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:21:39,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:21:39,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:39,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:21:39,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:39,796 INFO L321 Elim1Store]: treesize reduction 194, result has 13.0 percent of original size [2022-11-20 11:21:39,796 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 7 case distinctions, treesize of input 49 treesize of output 62 [2022-11-20 11:21:40,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:21:40,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:21:40,108 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:21:40,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1254089550] [2022-11-20 11:21:40,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1254089550] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:21:40,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:21:40,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:21:40,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352542669] [2022-11-20 11:21:40,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:21:40,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:21:40,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:21:40,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:21:40,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:21:40,111 INFO L87 Difference]: Start difference. First operand 1533 states and 6012 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:40,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:40,300 INFO L93 Difference]: Finished difference Result 1532 states and 6009 transitions. [2022-11-20 11:21:40,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:21:40,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 11:21:40,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:40,310 INFO L225 Difference]: With dead ends: 1532 [2022-11-20 11:21:40,310 INFO L226 Difference]: Without dead ends: 1532 [2022-11-20 11:21:40,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:21:40,311 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:21:40,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-11-20 11:21:40,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2022-11-20 11:21:40,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 1532. [2022-11-20 11:21:40,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1464 states have (on average 4.104508196721311) internal successors, (6009), 1531 states have internal predecessors, (6009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:40,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 6009 transitions. [2022-11-20 11:21:40,429 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 6009 transitions. Word has length 5 [2022-11-20 11:21:40,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:40,429 INFO L495 AbstractCegarLoop]: Abstraction has 1532 states and 6009 transitions. [2022-11-20 11:21:40,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:40,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 6009 transitions. [2022-11-20 11:21:40,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 11:21:40,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:40,431 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1] [2022-11-20 11:21:40,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:21:40,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:21:40,650 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:21:40,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:40,651 INFO L85 PathProgramCache]: Analyzing trace with hash 818578230, now seen corresponding path program 2 times [2022-11-20 11:21:40,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:21:40,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [666622939] [2022-11-20 11:21:40,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:21:40,652 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:21:40,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:21:40,653 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:21:40,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-20 11:21:40,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:21:40,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:21:40,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:21:40,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:40,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:21:40,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:21:40,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:21:40,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:21:40,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:21:40,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:21:41,058 INFO L321 Elim1Store]: treesize reduction 48, result has 43.5 percent of original size [2022-11-20 11:21:41,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 44 [2022-11-20 11:21:41,108 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-11-20 11:21:41,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2022-11-20 11:21:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:21:41,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:21:41,276 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:21:41,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [666622939] [2022-11-20 11:21:41,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [666622939] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:21:41,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:21:41,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:21:41,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281575633] [2022-11-20 11:21:41,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:21:41,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:21:41,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:21:41,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:21:41,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:21:41,278 INFO L87 Difference]: Start difference. First operand 1532 states and 6009 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:41,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:41,440 INFO L93 Difference]: Finished difference Result 1531 states and 6007 transitions. [2022-11-20 11:21:41,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:21:41,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 11:21:41,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:41,445 INFO L225 Difference]: With dead ends: 1531 [2022-11-20 11:21:41,445 INFO L226 Difference]: Without dead ends: 1531 [2022-11-20 11:21:41,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:21:41,446 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:21:41,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-11-20 11:21:41,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2022-11-20 11:21:41,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 1531. [2022-11-20 11:21:41,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1464 states have (on average 4.103142076502732) internal successors, (6007), 1530 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:41,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 6007 transitions. [2022-11-20 11:21:41,489 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 6007 transitions. Word has length 5 [2022-11-20 11:21:41,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:41,489 INFO L495 AbstractCegarLoop]: Abstraction has 1531 states and 6007 transitions. [2022-11-20 11:21:41,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:41,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 6007 transitions. [2022-11-20 11:21:41,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 11:21:41,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:41,490 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 11:21:41,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-20 11:21:41,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:21:41,694 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:21:41,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:41,694 INFO L85 PathProgramCache]: Analyzing trace with hash -393240771, now seen corresponding path program 1 times [2022-11-20 11:21:41,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:21:41,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602548485] [2022-11-20 11:21:41,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:41,695 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 [2022-11-20 11:21:41,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:21:41,696 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:21:41,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-20 11:21:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:41,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:21:41,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:41,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:21:41,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:21:41,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:21:41,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:21:41,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:21:42,115 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2022-11-20 11:21:42,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-11-20 11:21:42,161 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-20 11:21:42,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2022-11-20 11:21:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:42,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:21:43,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:43,208 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:21:43,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602548485] [2022-11-20 11:21:43,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602548485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:21:43,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:21:43,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-20 11:21:43,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093351415] [2022-11-20 11:21:43,209 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:21:43,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:21:43,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:21:43,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:21:43,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:21:43,210 INFO L87 Difference]: Start difference. First operand 1531 states and 6007 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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) [2022-11-20 11:21:43,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:43,930 INFO L93 Difference]: Finished difference Result 1535 states and 6016 transitions. [2022-11-20 11:21:43,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:21:43,931 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 11:21:43,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:43,937 INFO L225 Difference]: With dead ends: 1535 [2022-11-20 11:21:43,937 INFO L226 Difference]: Without dead ends: 1535 [2022-11-20 11:21:43,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:21:43,938 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 40 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:21:43,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 8 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 108 Invalid, 0 Unknown, 99 Unchecked, 0.6s Time] [2022-11-20 11:21:43,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2022-11-20 11:21:44,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1532. [2022-11-20 11:21:44,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1465 states have (on average 4.102389078498294) internal successors, (6010), 1531 states have internal predecessors, (6010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:44,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 6010 transitions. [2022-11-20 11:21:44,013 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 6010 transitions. Word has length 6 [2022-11-20 11:21:44,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:44,014 INFO L495 AbstractCegarLoop]: Abstraction has 1532 states and 6010 transitions. [2022-11-20 11:21:44,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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) [2022-11-20 11:21:44,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 6010 transitions. [2022-11-20 11:21:44,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 11:21:44,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:44,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 11:21:44,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-11-20 11:21:44,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:21:44,215 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:21:44,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:44,216 INFO L85 PathProgramCache]: Analyzing trace with hash -393240770, now seen corresponding path program 1 times [2022-11-20 11:21:44,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:21:44,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [261585648] [2022-11-20 11:21:44,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:44,216 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 [2022-11-20 11:21:44,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:21:44,218 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:21:44,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:21:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:44,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:21:44,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:44,553 INFO L321 Elim1Store]: treesize reduction 194, result has 13.0 percent of original size [2022-11-20 11:21:44,553 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 7 case distinctions, treesize of input 49 treesize of output 62 [2022-11-20 11:21:44,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:21:44,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:21:44,896 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:21:44,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [261585648] [2022-11-20 11:21:44,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [261585648] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:21:44,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:21:44,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:21:44,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601107245] [2022-11-20 11:21:44,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:21:44,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:21:44,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:21:44,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:21:44,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:21:44,898 INFO L87 Difference]: Start difference. First operand 1532 states and 6010 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-11-20 11:21:45,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:45,077 INFO L93 Difference]: Finished difference Result 1531 states and 6007 transitions. [2022-11-20 11:21:45,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:21:45,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2022-11-20 11:21:45,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:45,084 INFO L225 Difference]: With dead ends: 1531 [2022-11-20 11:21:45,085 INFO L226 Difference]: Without dead ends: 1531 [2022-11-20 11:21:45,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:21:45,086 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:21:45,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-11-20 11:21:45,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2022-11-20 11:21:45,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 1531. [2022-11-20 11:21:45,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1464 states have (on average 4.103142076502732) internal successors, (6007), 1530 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:45,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 6007 transitions. [2022-11-20 11:21:45,139 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 6007 transitions. Word has length 6 [2022-11-20 11:21:45,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:45,140 INFO L495 AbstractCegarLoop]: Abstraction has 1531 states and 6007 transitions. [2022-11-20 11:21:45,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-11-20 11:21:45,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 6007 transitions. [2022-11-20 11:21:45,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 11:21:45,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:45,141 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-20 11:21:45,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:21:45,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:21:45,356 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:21:45,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:45,356 INFO L85 PathProgramCache]: Analyzing trace with hash -393878727, now seen corresponding path program 2 times [2022-11-20 11:21:45,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:21:45,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [163128543] [2022-11-20 11:21:45,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:21:45,357 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 [2022-11-20 11:21:45,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:21:45,359 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:21:45,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:21:45,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:21:45,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:21:45,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 11:21:45,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:45,767 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:21:45,767 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:21:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:45,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:21:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:46,818 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:21:46,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [163128543] [2022-11-20 11:21:46,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [163128543] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:21:46,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:21:46,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 11:21:46,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307534256] [2022-11-20 11:21:46,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:21:46,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:21:46,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:21:46,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:21:46,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:21:46,820 INFO L87 Difference]: Start difference. First operand 1531 states and 6007 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:54,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:54,004 INFO L93 Difference]: Finished difference Result 13698 states and 53934 transitions. [2022-11-20 11:21:54,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:21:54,005 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 11:21:54,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:54,068 INFO L225 Difference]: With dead ends: 13698 [2022-11-20 11:21:54,068 INFO L226 Difference]: Without dead ends: 13698 [2022-11-20 11:21:54,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:21:54,068 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1242 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1242 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:21:54,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1242 Valid, 24 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-20 11:21:54,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13698 states. [2022-11-20 11:21:54,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13698 to 1537. [2022-11-20 11:21:54,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1470 states have (on average 4.094557823129252) internal successors, (6019), 1536 states have internal predecessors, (6019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:54,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 6019 transitions. [2022-11-20 11:21:54,247 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 6019 transitions. Word has length 6 [2022-11-20 11:21:54,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:54,247 INFO L495 AbstractCegarLoop]: Abstraction has 1537 states and 6019 transitions. [2022-11-20 11:21:54,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:54,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 6019 transitions. [2022-11-20 11:21:54,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 11:21:54,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:54,249 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:21:54,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:21:54,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:21:54,466 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:21:54,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:54,466 INFO L85 PathProgramCache]: Analyzing trace with hash 694436480, now seen corresponding path program 1 times [2022-11-20 11:21:54,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:21:54,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [760591769] [2022-11-20 11:21:54,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:54,467 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 [2022-11-20 11:21:54,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:21:54,468 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:21:54,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:21:54,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:54,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:21:54,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:54,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:21:54,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:21:54,649 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:21:54,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [760591769] [2022-11-20 11:21:54,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [760591769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:21:54,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:21:54,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:21:54,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247672439] [2022-11-20 11:21:54,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:21:54,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:21:54,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:21:54,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:21:54,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:21:54,650 INFO L87 Difference]: Start difference. First operand 1537 states and 6019 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2022-11-20 11:21:55,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:55,171 INFO L93 Difference]: Finished difference Result 2303 states and 8959 transitions. [2022-11-20 11:21:55,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:21:55,171 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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 [2022-11-20 11:21:55,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:55,180 INFO L225 Difference]: With dead ends: 2303 [2022-11-20 11:21:55,181 INFO L226 Difference]: Without dead ends: 2303 [2022-11-20 11:21:55,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:21:55,190 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 185 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:21:55,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 5 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:21:55,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2022-11-20 11:21:55,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 1801. [2022-11-20 11:21:55,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1734 states have (on average 4.239331026528259) internal successors, (7351), 1800 states have internal predecessors, (7351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:55,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 7351 transitions. [2022-11-20 11:21:55,262 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 7351 transitions. Word has length 7 [2022-11-20 11:21:55,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:55,262 INFO L495 AbstractCegarLoop]: Abstraction has 1801 states and 7351 transitions. [2022-11-20 11:21:55,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2022-11-20 11:21:55,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 7351 transitions. [2022-11-20 11:21:55,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 11:21:55,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:55,264 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:21:55,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:21:55,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:21:55,480 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:21:55,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:55,481 INFO L85 PathProgramCache]: Analyzing trace with hash 694436580, now seen corresponding path program 1 times [2022-11-20 11:21:55,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:21:55,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1668112689] [2022-11-20 11:21:55,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:55,482 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 [2022-11-20 11:21:55,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:21:55,484 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:21:55,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:21:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:55,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 11:21:55,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:55,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:21:55,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:21:55,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:21:55,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:21:55,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:21:55,860 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2022-11-20 11:21:55,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-11-20 11:21:55,893 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-20 11:21:55,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2022-11-20 11:21:56,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:56,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:21:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:56,789 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:21:56,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1668112689] [2022-11-20 11:21:56,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1668112689] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:21:56,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:21:56,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-20 11:21:56,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320548515] [2022-11-20 11:21:56,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:21:56,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:21:56,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:21:56,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:21:56,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:21:56,792 INFO L87 Difference]: Start difference. First operand 1801 states and 7351 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:57,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:57,473 INFO L93 Difference]: Finished difference Result 1806 states and 7364 transitions. [2022-11-20 11:21:57,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:21:57,473 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2022-11-20 11:21:57,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:57,481 INFO L225 Difference]: With dead ends: 1806 [2022-11-20 11:21:57,481 INFO L226 Difference]: Without dead ends: 1806 [2022-11-20 11:21:57,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:21:57,491 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:21:57,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 9 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 128 Invalid, 0 Unknown, 99 Unchecked, 0.6s Time] [2022-11-20 11:21:57,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2022-11-20 11:21:57,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1802. [2022-11-20 11:21:57,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1735 states have (on average 4.239193083573487) internal successors, (7355), 1801 states have internal predecessors, (7355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:57,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 7355 transitions. [2022-11-20 11:21:57,564 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 7355 transitions. Word has length 7 [2022-11-20 11:21:57,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:57,565 INFO L495 AbstractCegarLoop]: Abstraction has 1802 states and 7355 transitions. [2022-11-20 11:21:57,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:57,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 7355 transitions. [2022-11-20 11:21:57,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 11:21:57,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:57,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:21:57,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:21:57,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:21:57,779 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:21:57,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:57,780 INFO L85 PathProgramCache]: Analyzing trace with hash 694436581, now seen corresponding path program 1 times [2022-11-20 11:21:57,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:21:57,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254466531] [2022-11-20 11:21:57,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:57,781 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 [2022-11-20 11:21:57,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:21:57,782 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:21:57,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:21:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:57,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:21:57,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:58,086 INFO L321 Elim1Store]: treesize reduction 194, result has 13.0 percent of original size [2022-11-20 11:21:58,086 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 7 case distinctions, treesize of input 49 treesize of output 62 [2022-11-20 11:21:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:21:58,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:21:58,462 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:21:58,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254466531] [2022-11-20 11:21:58,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254466531] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:21:58,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:21:58,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:21:58,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149276192] [2022-11-20 11:21:58,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:21:58,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:21:58,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:21:58,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:21:58,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:21:58,465 INFO L87 Difference]: Start difference. First operand 1802 states and 7355 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:58,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:58,616 INFO L93 Difference]: Finished difference Result 1801 states and 7351 transitions. [2022-11-20 11:21:58,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:21:58,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 11:21:58,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:58,626 INFO L225 Difference]: With dead ends: 1801 [2022-11-20 11:21:58,626 INFO L226 Difference]: Without dead ends: 1801 [2022-11-20 11:21:58,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:21:58,627 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:21:58,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-11-20 11:21:58,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2022-11-20 11:21:58,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 1801. [2022-11-20 11:21:58,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1734 states have (on average 4.239331026528259) internal successors, (7351), 1800 states have internal predecessors, (7351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:58,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 7351 transitions. [2022-11-20 11:21:58,695 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 7351 transitions. Word has length 7 [2022-11-20 11:21:58,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:58,695 INFO L495 AbstractCegarLoop]: Abstraction has 1801 states and 7351 transitions. [2022-11-20 11:21:58,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:58,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 7351 transitions. [2022-11-20 11:21:58,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 11:21:58,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:58,696 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:21:58,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:21:58,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:21:58,908 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:21:58,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:58,909 INFO L85 PathProgramCache]: Analyzing trace with hash 694650597, now seen corresponding path program 1 times [2022-11-20 11:21:58,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:21:58,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612777132] [2022-11-20 11:21:58,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:58,910 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 [2022-11-20 11:21:58,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:21:58,912 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:21:58,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:21:59,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:59,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:21:59,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:59,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:21:59,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:21:59,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:21:59,345 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-20 11:21:59,346 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 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-20 11:21:59,369 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 [2022-11-20 11:21:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:59,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:22:00,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:22:00,021 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:22:00,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612777132] [2022-11-20 11:22:00,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612777132] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:22:00,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:22:00,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-20 11:22:00,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42755762] [2022-11-20 11:22:00,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:22:00,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:22:00,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:22:00,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:22:00,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:22:00,023 INFO L87 Difference]: Start difference. First operand 1801 states and 7351 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:00,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:00,739 INFO L93 Difference]: Finished difference Result 3611 states and 14750 transitions. [2022-11-20 11:22:00,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:22:00,740 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2022-11-20 11:22:00,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:00,752 INFO L225 Difference]: With dead ends: 3611 [2022-11-20 11:22:00,752 INFO L226 Difference]: Without dead ends: 3611 [2022-11-20 11:22:00,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:22:00,753 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 172 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:00,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 4 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 126 Invalid, 0 Unknown, 174 Unchecked, 0.6s Time] [2022-11-20 11:22:00,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3611 states. [2022-11-20 11:22:00,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3611 to 1832. [2022-11-20 11:22:00,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1767 states have (on average 4.233729485002829) internal successors, (7481), 1831 states have internal predecessors, (7481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:00,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 7481 transitions. [2022-11-20 11:22:00,824 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 7481 transitions. Word has length 7 [2022-11-20 11:22:00,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:00,825 INFO L495 AbstractCegarLoop]: Abstraction has 1832 states and 7481 transitions. [2022-11-20 11:22:00,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:00,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 7481 transitions. [2022-11-20 11:22:00,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 11:22:00,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:00,826 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:00,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:22:01,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:22:01,037 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:22:01,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:01,038 INFO L85 PathProgramCache]: Analyzing trace with hash 694650598, now seen corresponding path program 1 times [2022-11-20 11:22:01,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:22:01,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216277654] [2022-11-20 11:22:01,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:01,038 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 [2022-11-20 11:22:01,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:22:01,040 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:22:01,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:22:01,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:01,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:22:01,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:01,323 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2022-11-20 11:22:01,324 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 5 case distinctions, treesize of input 36 treesize of output 51 [2022-11-20 11:22:01,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:22:01,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:22:01,565 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:22:01,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216277654] [2022-11-20 11:22:01,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216277654] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:22:01,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:22:01,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:22:01,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957256109] [2022-11-20 11:22:01,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:22:01,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:22:01,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:22:01,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:22:01,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:22:01,567 INFO L87 Difference]: Start difference. First operand 1832 states and 7481 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:01,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:01,694 INFO L93 Difference]: Finished difference Result 1831 states and 7477 transitions. [2022-11-20 11:22:01,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:22:01,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 11:22:01,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:01,702 INFO L225 Difference]: With dead ends: 1831 [2022-11-20 11:22:01,702 INFO L226 Difference]: Without dead ends: 1831 [2022-11-20 11:22:01,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:22:01,703 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:01,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-11-20 11:22:01,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2022-11-20 11:22:01,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1831. [2022-11-20 11:22:01,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1766 states have (on average 4.233861834654586) internal successors, (7477), 1830 states have internal predecessors, (7477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:01,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 7477 transitions. [2022-11-20 11:22:01,752 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 7477 transitions. Word has length 7 [2022-11-20 11:22:01,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:01,752 INFO L495 AbstractCegarLoop]: Abstraction has 1831 states and 7477 transitions. [2022-11-20 11:22:01,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:01,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 7477 transitions. [2022-11-20 11:22:01,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 11:22:01,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:01,753 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2022-11-20 11:22:01,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:22:01,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:22:01,965 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:22:01,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:01,966 INFO L85 PathProgramCache]: Analyzing trace with hash 674684992, now seen corresponding path program 2 times [2022-11-20 11:22:01,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:22:01,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1607505694] [2022-11-20 11:22:01,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:22:01,967 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 [2022-11-20 11:22:01,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:22:01,968 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:22:01,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:22:02,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:22:02,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:22:02,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:22:02,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:02,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:22:02,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:22:02,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:22:02,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:22:02,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:22:02,273 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2022-11-20 11:22:02,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-11-20 11:22:02,305 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-20 11:22:02,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2022-11-20 11:22:02,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:22:02,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:22:02,461 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:22:02,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1607505694] [2022-11-20 11:22:02,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1607505694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:22:02,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:22:02,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:22:02,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782284920] [2022-11-20 11:22:02,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:22:02,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:22:02,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:22:02,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:22:02,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:22:02,462 INFO L87 Difference]: Start difference. First operand 1831 states and 7477 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:02,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:02,602 INFO L93 Difference]: Finished difference Result 1830 states and 7475 transitions. [2022-11-20 11:22:02,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:22:02,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 11:22:02,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:02,608 INFO L225 Difference]: With dead ends: 1830 [2022-11-20 11:22:02,609 INFO L226 Difference]: Without dead ends: 1830 [2022-11-20 11:22:02,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:22:02,609 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:02,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-11-20 11:22:02,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2022-11-20 11:22:02,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1830. [2022-11-20 11:22:02,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1765 states have (on average 4.235127478753541) internal successors, (7475), 1829 states have internal predecessors, (7475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:02,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 7475 transitions. [2022-11-20 11:22:02,641 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 7475 transitions. Word has length 7 [2022-11-20 11:22:02,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:02,642 INFO L495 AbstractCegarLoop]: Abstraction has 1830 states and 7475 transitions. [2022-11-20 11:22:02,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:02,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 7475 transitions. [2022-11-20 11:22:02,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 11:22:02,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:02,642 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:02,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:22:02,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:22:02,844 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:22:02,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:02,844 INFO L85 PathProgramCache]: Analyzing trace with hash 52698473, now seen corresponding path program 1 times [2022-11-20 11:22:02,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:22:02,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1276085836] [2022-11-20 11:22:02,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:02,844 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 [2022-11-20 11:22:02,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:22:02,845 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:22:02,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-20 11:22:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:02,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:22:02,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:03,185 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:22:03,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:22:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:22:03,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:22:03,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:22:03,807 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:22:03,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1276085836] [2022-11-20 11:22:03,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1276085836] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:22:03,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:22:03,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:22:03,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896288817] [2022-11-20 11:22:03,808 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:22:03,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:22:03,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:22:03,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:22:03,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:22:03,809 INFO L87 Difference]: Start difference. First operand 1830 states and 7475 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:06,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:06,040 INFO L93 Difference]: Finished difference Result 3108 states and 12757 transitions. [2022-11-20 11:22:06,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:22:06,041 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 11:22:06,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:06,052 INFO L225 Difference]: With dead ends: 3108 [2022-11-20 11:22:06,052 INFO L226 Difference]: Without dead ends: 3108 [2022-11-20 11:22:06,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:22:06,053 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 360 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:06,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 9 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-20 11:22:06,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3108 states. [2022-11-20 11:22:06,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3108 to 2643. [2022-11-20 11:22:06,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2643 states, 2578 states have (on average 4.383242823894492) internal successors, (11300), 2642 states have internal predecessors, (11300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:06,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2643 states to 2643 states and 11300 transitions. [2022-11-20 11:22:06,127 INFO L78 Accepts]: Start accepts. Automaton has 2643 states and 11300 transitions. Word has length 8 [2022-11-20 11:22:06,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:06,128 INFO L495 AbstractCegarLoop]: Abstraction has 2643 states and 11300 transitions. [2022-11-20 11:22:06,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:06,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2643 states and 11300 transitions. [2022-11-20 11:22:06,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 11:22:06,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:06,129 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:06,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-20 11:22:06,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:22:06,340 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:22:06,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:06,341 INFO L85 PathProgramCache]: Analyzing trace with hash 52698573, now seen corresponding path program 1 times [2022-11-20 11:22:06,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:22:06,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2077005449] [2022-11-20 11:22:06,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:06,341 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 [2022-11-20 11:22:06,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:22:06,342 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:22:06,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-20 11:22:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:06,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:22:06,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:06,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:22:06,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:22:06,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:22:06,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:22:06,705 INFO L321 Elim1Store]: treesize reduction 74, result has 36.8 percent of original size [2022-11-20 11:22:06,705 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 4 case distinctions, treesize of input 20 treesize of output 50 [2022-11-20 11:22:06,748 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-20 11:22:06,748 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 154 treesize of output 153 [2022-11-20 11:22:07,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:22:07,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:22:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:22:07,594 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:22:07,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2077005449] [2022-11-20 11:22:07,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2077005449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:22:07,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:22:07,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-20 11:22:07,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829364955] [2022-11-20 11:22:07,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:22:07,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:22:07,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:22:07,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:22:07,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:22:07,596 INFO L87 Difference]: Start difference. First operand 2643 states and 11300 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:08,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:08,166 INFO L93 Difference]: Finished difference Result 2651 states and 11320 transitions. [2022-11-20 11:22:08,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:22:08,167 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 11:22:08,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:08,175 INFO L225 Difference]: With dead ends: 2651 [2022-11-20 11:22:08,175 INFO L226 Difference]: Without dead ends: 2651 [2022-11-20 11:22:08,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:22:08,176 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 38 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:08,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 7 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 97 Invalid, 0 Unknown, 70 Unchecked, 0.5s Time] [2022-11-20 11:22:08,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2022-11-20 11:22:08,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2643. [2022-11-20 11:22:08,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2643 states, 2578 states have (on average 4.381691233514352) internal successors, (11296), 2642 states have internal predecessors, (11296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:08,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2643 states to 2643 states and 11296 transitions. [2022-11-20 11:22:08,231 INFO L78 Accepts]: Start accepts. Automaton has 2643 states and 11296 transitions. Word has length 8 [2022-11-20 11:22:08,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:08,232 INFO L495 AbstractCegarLoop]: Abstraction has 2643 states and 11296 transitions. [2022-11-20 11:22:08,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:08,232 INFO L276 IsEmpty]: Start isEmpty. Operand 2643 states and 11296 transitions. [2022-11-20 11:22:08,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 11:22:08,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:08,233 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:08,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-11-20 11:22:08,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:22:08,439 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:22:08,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:08,439 INFO L85 PathProgramCache]: Analyzing trace with hash 52698574, now seen corresponding path program 1 times [2022-11-20 11:22:08,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:22:08,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389862133] [2022-11-20 11:22:08,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:08,440 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 [2022-11-20 11:22:08,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:22:08,441 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:22:08,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:22:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:08,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:22:08,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:08,759 INFO L321 Elim1Store]: treesize reduction 194, result has 13.0 percent of original size [2022-11-20 11:22:08,760 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 7 case distinctions, treesize of input 49 treesize of output 62 [2022-11-20 11:22:09,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:22:09,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:22:09,186 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:22:09,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1389862133] [2022-11-20 11:22:09,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1389862133] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:22:09,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:22:09,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:22:09,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059536253] [2022-11-20 11:22:09,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:22:09,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:22:09,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:22:09,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:22:09,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:22:09,187 INFO L87 Difference]: Start difference. First operand 2643 states and 11296 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2022-11-20 11:22:09,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:09,334 INFO L93 Difference]: Finished difference Result 2639 states and 11279 transitions. [2022-11-20 11:22:09,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:22:09,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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 [2022-11-20 11:22:09,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:09,344 INFO L225 Difference]: With dead ends: 2639 [2022-11-20 11:22:09,345 INFO L226 Difference]: Without dead ends: 2639 [2022-11-20 11:22:09,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:22:09,345 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:09,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-11-20 11:22:09,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2022-11-20 11:22:09,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 2639. [2022-11-20 11:22:09,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2639 states, 2574 states have (on average 4.381895881895882) internal successors, (11279), 2638 states have internal predecessors, (11279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:09,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2639 states to 2639 states and 11279 transitions. [2022-11-20 11:22:09,436 INFO L78 Accepts]: Start accepts. Automaton has 2639 states and 11279 transitions. Word has length 8 [2022-11-20 11:22:09,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:09,436 INFO L495 AbstractCegarLoop]: Abstraction has 2639 states and 11279 transitions. [2022-11-20 11:22:09,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2022-11-20 11:22:09,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2639 states and 11279 transitions. [2022-11-20 11:22:09,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 11:22:09,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:09,437 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:09,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-11-20 11:22:09,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:22:09,651 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:22:09,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:09,652 INFO L85 PathProgramCache]: Analyzing trace with hash 52760195, now seen corresponding path program 1 times [2022-11-20 11:22:09,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:22:09,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313482765] [2022-11-20 11:22:09,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:09,652 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:22:09,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:22:09,654 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:22:09,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:22:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:09,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:22:09,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:09,951 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2022-11-20 11:22:09,952 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 5 case distinctions, treesize of input 36 treesize of output 51 [2022-11-20 11:22:10,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:22:10,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:22:10,269 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:22:10,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313482765] [2022-11-20 11:22:10,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313482765] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:22:10,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:22:10,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:22:10,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933944103] [2022-11-20 11:22:10,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:22:10,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:22:10,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:22:10,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:22:10,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:22:10,270 INFO L87 Difference]: Start difference. First operand 2639 states and 11279 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2022-11-20 11:22:10,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:10,409 INFO L93 Difference]: Finished difference Result 2638 states and 11275 transitions. [2022-11-20 11:22:10,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:22:10,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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 [2022-11-20 11:22:10,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:10,420 INFO L225 Difference]: With dead ends: 2638 [2022-11-20 11:22:10,420 INFO L226 Difference]: Without dead ends: 2638 [2022-11-20 11:22:10,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:22:10,421 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:10,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-11-20 11:22:10,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2638 states. [2022-11-20 11:22:10,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2638 to 2638. [2022-11-20 11:22:10,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 2573 states have (on average 4.382044306257288) internal successors, (11275), 2637 states have internal predecessors, (11275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:10,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 11275 transitions. [2022-11-20 11:22:10,508 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 11275 transitions. Word has length 8 [2022-11-20 11:22:10,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:10,509 INFO L495 AbstractCegarLoop]: Abstraction has 2638 states and 11275 transitions. [2022-11-20 11:22:10,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2022-11-20 11:22:10,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 11275 transitions. [2022-11-20 11:22:10,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 11:22:10,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:10,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:10,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-11-20 11:22:10,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:22:10,710 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:22:10,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:10,710 INFO L85 PathProgramCache]: Analyzing trace with hash 59326553, now seen corresponding path program 1 times [2022-11-20 11:22:10,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:22:10,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888144237] [2022-11-20 11:22:10,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:10,711 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 [2022-11-20 11:22:10,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:22:10,712 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:22:10,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-20 11:22:10,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:10,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:22:10,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:11,013 INFO L321 Elim1Store]: treesize reduction 180, result has 15.5 percent of original size [2022-11-20 11:22:11,013 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 5 case distinctions, treesize of input 36 treesize of output 55 [2022-11-20 11:22:11,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:22:11,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:22:11,057 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:22:11,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888144237] [2022-11-20 11:22:11,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888144237] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:22:11,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:22:11,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:22:11,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542121049] [2022-11-20 11:22:11,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:22:11,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:22:11,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:22:11,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:22:11,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:22:11,058 INFO L87 Difference]: Start difference. First operand 2638 states and 11275 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2022-11-20 11:22:11,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:11,277 INFO L93 Difference]: Finished difference Result 2587 states and 11068 transitions. [2022-11-20 11:22:11,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:22:11,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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 [2022-11-20 11:22:11,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:11,287 INFO L225 Difference]: With dead ends: 2587 [2022-11-20 11:22:11,288 INFO L226 Difference]: Without dead ends: 2587 [2022-11-20 11:22:11,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:22:11,289 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:11,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 1 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:22:11,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2022-11-20 11:22:11,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 2587. [2022-11-20 11:22:11,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2587 states, 2528 states have (on average 4.378164556962025) internal successors, (11068), 2586 states have internal predecessors, (11068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:11,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2587 states to 2587 states and 11068 transitions. [2022-11-20 11:22:11,370 INFO L78 Accepts]: Start accepts. Automaton has 2587 states and 11068 transitions. Word has length 8 [2022-11-20 11:22:11,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:11,370 INFO L495 AbstractCegarLoop]: Abstraction has 2587 states and 11068 transitions. [2022-11-20 11:22:11,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2022-11-20 11:22:11,370 INFO L276 IsEmpty]: Start isEmpty. Operand 2587 states and 11068 transitions. [2022-11-20 11:22:11,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 11:22:11,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:11,371 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2022-11-20 11:22:11,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-20 11:22:11,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:22:11,585 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:22:11,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:11,586 INFO L85 PathProgramCache]: Analyzing trace with hash -559607971, now seen corresponding path program 2 times [2022-11-20 11:22:11,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:22:11,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1265676304] [2022-11-20 11:22:11,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:22:11,586 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 [2022-11-20 11:22:11,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:22:11,587 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:22:11,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-20 11:22:11,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:22:11,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:22:11,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:22:11,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:11,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:22:11,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:22:11,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:22:11,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:22:11,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:22:12,001 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2022-11-20 11:22:12,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-11-20 11:22:12,043 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-20 11:22:12,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2022-11-20 11:22:12,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:22:12,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:22:12,303 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:22:12,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1265676304] [2022-11-20 11:22:12,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1265676304] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:22:12,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:22:12,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:22:12,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381755939] [2022-11-20 11:22:12,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:22:12,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:22:12,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:22:12,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:22:12,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:22:12,305 INFO L87 Difference]: Start difference. First operand 2587 states and 11068 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) [2022-11-20 11:22:12,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:12,469 INFO L93 Difference]: Finished difference Result 2586 states and 11066 transitions. [2022-11-20 11:22:12,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:22:12,469 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 8 [2022-11-20 11:22:12,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:12,483 INFO L225 Difference]: With dead ends: 2586 [2022-11-20 11:22:12,483 INFO L226 Difference]: Without dead ends: 2586 [2022-11-20 11:22:12,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:22:12,484 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:12,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 82 Unchecked, 0.1s Time] [2022-11-20 11:22:12,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2586 states. [2022-11-20 11:22:12,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2586 to 2586. [2022-11-20 11:22:12,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2586 states, 2527 states have (on average 4.379105658884052) internal successors, (11066), 2585 states have internal predecessors, (11066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:12,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2586 states to 2586 states and 11066 transitions. [2022-11-20 11:22:12,569 INFO L78 Accepts]: Start accepts. Automaton has 2586 states and 11066 transitions. Word has length 8 [2022-11-20 11:22:12,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:12,569 INFO L495 AbstractCegarLoop]: Abstraction has 2586 states and 11066 transitions. [2022-11-20 11:22:12,569 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) [2022-11-20 11:22:12,570 INFO L276 IsEmpty]: Start isEmpty. Operand 2586 states and 11066 transitions. [2022-11-20 11:22:12,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:22:12,570 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:12,571 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:12,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-20 11:22:12,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:22:12,784 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:22:12,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:12,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1633655875, now seen corresponding path program 1 times [2022-11-20 11:22:12,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:22:12,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339368449] [2022-11-20 11:22:12,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:12,785 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 [2022-11-20 11:22:12,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:22:12,787 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:22:12,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:22:13,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:13,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 11:22:13,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:13,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:22:13,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:22:13,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:22:13,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:22:13,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:22:13,260 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2022-11-20 11:22:13,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-11-20 11:22:13,295 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-20 11:22:13,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2022-11-20 11:22:14,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:22:14,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:22:14,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:22:14,492 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:22:14,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339368449] [2022-11-20 11:22:14,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339368449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:22:14,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:22:14,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:22:14,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221823629] [2022-11-20 11:22:14,492 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:22:14,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:22:14,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:22:14,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:22:14,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:22:14,493 INFO L87 Difference]: Start difference. First operand 2586 states and 11066 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:14,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:14,621 INFO L93 Difference]: Finished difference Result 2588 states and 11069 transitions. [2022-11-20 11:22:14,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:22:14,621 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 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 [2022-11-20 11:22:14,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:14,629 INFO L225 Difference]: With dead ends: 2588 [2022-11-20 11:22:14,629 INFO L226 Difference]: Without dead ends: 2588 [2022-11-20 11:22:14,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:22:14,629 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:14,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 119 Unchecked, 0.1s Time] [2022-11-20 11:22:14,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2022-11-20 11:22:14,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 2586. [2022-11-20 11:22:14,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2586 states, 2527 states have (on average 4.3787099327265535) internal successors, (11065), 2585 states have internal predecessors, (11065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:14,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2586 states to 2586 states and 11065 transitions. [2022-11-20 11:22:14,679 INFO L78 Accepts]: Start accepts. Automaton has 2586 states and 11065 transitions. Word has length 9 [2022-11-20 11:22:14,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:14,679 INFO L495 AbstractCegarLoop]: Abstraction has 2586 states and 11065 transitions. [2022-11-20 11:22:14,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:14,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2586 states and 11065 transitions. [2022-11-20 11:22:14,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:22:14,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:14,680 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:14,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:22:14,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:22:14,880 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:22:14,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:14,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1633655876, now seen corresponding path program 1 times [2022-11-20 11:22:14,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:22:14,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [789583072] [2022-11-20 11:22:14,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:14,881 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 [2022-11-20 11:22:14,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:22:14,882 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:22:14,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:22:15,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:15,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:22:15,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:15,182 INFO L321 Elim1Store]: treesize reduction 194, result has 13.0 percent of original size [2022-11-20 11:22:15,182 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 7 case distinctions, treesize of input 49 treesize of output 62 [2022-11-20 11:22:15,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:22:15,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:22:15,574 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:22:15,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [789583072] [2022-11-20 11:22:15,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [789583072] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:22:15,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:22:15,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:22:15,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016360234] [2022-11-20 11:22:15,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:22:15,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:22:15,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:22:15,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:22:15,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:22:15,576 INFO L87 Difference]: Start difference. First operand 2586 states and 11065 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:15,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:15,706 INFO L93 Difference]: Finished difference Result 2585 states and 11061 transitions. [2022-11-20 11:22:15,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:22:15,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 11:22:15,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:15,719 INFO L225 Difference]: With dead ends: 2585 [2022-11-20 11:22:15,719 INFO L226 Difference]: Without dead ends: 2585 [2022-11-20 11:22:15,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:22:15,720 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:15,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-11-20 11:22:15,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2585 states. [2022-11-20 11:22:15,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2585 to 2585. [2022-11-20 11:22:15,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2585 states, 2527 states have (on average 4.377127028096557) internal successors, (11061), 2584 states have internal predecessors, (11061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:15,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2585 states to 2585 states and 11061 transitions. [2022-11-20 11:22:15,783 INFO L78 Accepts]: Start accepts. Automaton has 2585 states and 11061 transitions. Word has length 9 [2022-11-20 11:22:15,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:15,783 INFO L495 AbstractCegarLoop]: Abstraction has 2585 states and 11061 transitions. [2022-11-20 11:22:15,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:15,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2585 states and 11061 transitions. [2022-11-20 11:22:15,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:22:15,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:15,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:15,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 11:22:15,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:22:15,984 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:22:15,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:15,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1839315000, now seen corresponding path program 1 times [2022-11-20 11:22:15,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:22:15,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543933377] [2022-11-20 11:22:15,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:15,985 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 [2022-11-20 11:22:15,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:22:15,986 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:22:15,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-20 11:22:16,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:16,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:22:16,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:16,389 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:22:16,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:22:16,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:22:16,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:22:16,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:22:16,953 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:22:16,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543933377] [2022-11-20 11:22:16,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543933377] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:22:16,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:22:16,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-20 11:22:16,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793119513] [2022-11-20 11:22:16,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:22:16,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:22:16,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:22:16,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:22:16,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:22:16,955 INFO L87 Difference]: Start difference. First operand 2585 states and 11061 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:17,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:17,680 INFO L93 Difference]: Finished difference Result 5268 states and 22666 transitions. [2022-11-20 11:22:17,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:22:17,680 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 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 [2022-11-20 11:22:17,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:17,698 INFO L225 Difference]: With dead ends: 5268 [2022-11-20 11:22:17,698 INFO L226 Difference]: Without dead ends: 5268 [2022-11-20 11:22:17,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:22:17,699 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 146 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:17,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 6 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 124 Invalid, 0 Unknown, 177 Unchecked, 0.6s Time] [2022-11-20 11:22:17,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2022-11-20 11:22:17,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 2808. [2022-11-20 11:22:17,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2808 states, 2751 states have (on average 4.423118865866957) internal successors, (12168), 2807 states have internal predecessors, (12168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:17,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2808 states to 2808 states and 12168 transitions. [2022-11-20 11:22:17,771 INFO L78 Accepts]: Start accepts. Automaton has 2808 states and 12168 transitions. Word has length 9 [2022-11-20 11:22:17,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:17,771 INFO L495 AbstractCegarLoop]: Abstraction has 2808 states and 12168 transitions. [2022-11-20 11:22:17,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:17,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2808 states and 12168 transitions. [2022-11-20 11:22:17,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:22:17,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:17,772 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:17,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-20 11:22:17,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:22:17,985 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:22:17,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:17,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1839315002, now seen corresponding path program 1 times [2022-11-20 11:22:17,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:22:17,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293277387] [2022-11-20 11:22:17,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:17,986 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 [2022-11-20 11:22:17,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:22:17,987 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:22:17,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-20 11:22:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:18,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:22:18,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:18,312 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2022-11-20 11:22:18,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 36 [2022-11-20 11:22:18,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:22:18,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:22:18,351 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:22:18,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1293277387] [2022-11-20 11:22:18,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1293277387] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:22:18,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:22:18,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:22:18,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510739779] [2022-11-20 11:22:18,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:22:18,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:22:18,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:22:18,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:22:18,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:22:18,353 INFO L87 Difference]: Start difference. First operand 2808 states and 12168 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:18,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:18,514 INFO L93 Difference]: Finished difference Result 2626 states and 11205 transitions. [2022-11-20 11:22:18,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:22:18,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 11:22:18,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:18,522 INFO L225 Difference]: With dead ends: 2626 [2022-11-20 11:22:18,522 INFO L226 Difference]: Without dead ends: 2626 [2022-11-20 11:22:18,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:22:18,523 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:18,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:22:18,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2022-11-20 11:22:18,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 2626. [2022-11-20 11:22:18,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2626 states, 2578 states have (on average 4.346392552366176) internal successors, (11205), 2625 states have internal predecessors, (11205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:18,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2626 states to 2626 states and 11205 transitions. [2022-11-20 11:22:18,575 INFO L78 Accepts]: Start accepts. Automaton has 2626 states and 11205 transitions. Word has length 9 [2022-11-20 11:22:18,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:18,575 INFO L495 AbstractCegarLoop]: Abstraction has 2626 states and 11205 transitions. [2022-11-20 11:22:18,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:18,575 INFO L276 IsEmpty]: Start isEmpty. Operand 2626 states and 11205 transitions. [2022-11-20 11:22:18,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:22:18,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:18,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:18,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 11:22:18,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:22:18,776 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:22:18,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:18,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1839121778, now seen corresponding path program 1 times [2022-11-20 11:22:18,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:22:18,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026052886] [2022-11-20 11:22:18,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:18,777 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 [2022-11-20 11:22:18,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:22:18,778 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:22:18,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:22:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:18,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:22:18,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:18,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:22:18,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:22:18,979 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:22:18,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026052886] [2022-11-20 11:22:18,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026052886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:22:18,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:22:18,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:22:18,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50587895] [2022-11-20 11:22:18,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:22:18,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:22:18,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:22:18,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:22:18,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:22:18,981 INFO L87 Difference]: Start difference. First operand 2626 states and 11205 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) [2022-11-20 11:22:19,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:19,470 INFO L93 Difference]: Finished difference Result 3702 states and 15815 transitions. [2022-11-20 11:22:19,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:22:19,470 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 9 [2022-11-20 11:22:19,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:19,481 INFO L225 Difference]: With dead ends: 3702 [2022-11-20 11:22:19,481 INFO L226 Difference]: Without dead ends: 3702 [2022-11-20 11:22:19,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:22:19,482 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 154 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:19,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 6 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:22:19,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2022-11-20 11:22:19,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 3135. [2022-11-20 11:22:19,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3135 states, 3087 states have (on average 4.5092322643343055) internal successors, (13920), 3134 states have internal predecessors, (13920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:19,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3135 states to 3135 states and 13920 transitions. [2022-11-20 11:22:19,557 INFO L78 Accepts]: Start accepts. Automaton has 3135 states and 13920 transitions. Word has length 9 [2022-11-20 11:22:19,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:19,557 INFO L495 AbstractCegarLoop]: Abstraction has 3135 states and 13920 transitions. [2022-11-20 11:22:19,558 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) [2022-11-20 11:22:19,558 INFO L276 IsEmpty]: Start isEmpty. Operand 3135 states and 13920 transitions. [2022-11-20 11:22:19,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:22:19,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:19,558 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:19,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-11-20 11:22:19,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:22:19,764 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:22:19,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:19,764 INFO L85 PathProgramCache]: Analyzing trace with hash -167765307, now seen corresponding path program 2 times [2022-11-20 11:22:19,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:22:19,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803760688] [2022-11-20 11:22:19,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:22:19,765 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 [2022-11-20 11:22:19,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:22:19,765 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:22:19,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:22:19,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:22:19,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:22:19,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:22:19,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:19,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:22:19,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:22:19,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:22:20,102 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-20 11:22:20,102 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 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-20 11:22:20,120 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 [2022-11-20 11:22:20,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:22:20,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:22:20,303 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:22:20,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803760688] [2022-11-20 11:22:20,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803760688] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:22:20,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:22:20,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:22:20,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345159198] [2022-11-20 11:22:20,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:22:20,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:22:20,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:22:20,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:22:20,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:22:20,306 INFO L87 Difference]: Start difference. First operand 3135 states and 13920 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:20,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:20,429 INFO L93 Difference]: Finished difference Result 3134 states and 13917 transitions. [2022-11-20 11:22:20,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:22:20,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 11:22:20,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:20,440 INFO L225 Difference]: With dead ends: 3134 [2022-11-20 11:22:20,440 INFO L226 Difference]: Without dead ends: 3134 [2022-11-20 11:22:20,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:22:20,441 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:20,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-20 11:22:20,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3134 states. [2022-11-20 11:22:20,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3134 to 3134. [2022-11-20 11:22:20,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3134 states, 3086 states have (on average 4.509721322099805) internal successors, (13917), 3133 states have internal predecessors, (13917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:20,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3134 states to 3134 states and 13917 transitions. [2022-11-20 11:22:20,548 INFO L78 Accepts]: Start accepts. Automaton has 3134 states and 13917 transitions. Word has length 9 [2022-11-20 11:22:20,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:20,548 INFO L495 AbstractCegarLoop]: Abstraction has 3134 states and 13917 transitions. [2022-11-20 11:22:20,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:20,548 INFO L276 IsEmpty]: Start isEmpty. Operand 3134 states and 13917 transitions. [2022-11-20 11:22:20,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:22:20,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:20,549 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:20,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:22:20,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:22:20,760 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:22:20,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:20,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1184184527, now seen corresponding path program 1 times [2022-11-20 11:22:20,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:22:20,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533486126] [2022-11-20 11:22:20,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:20,761 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 [2022-11-20 11:22:20,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:22:20,762 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:22:20,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:22:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:20,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:22:20,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:21,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:22:21,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:22:21,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-20 11:22:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:22:21,387 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:22:21,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533486126] [2022-11-20 11:22:21,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [533486126] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:22:21,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:22:21,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:22:21,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771350152] [2022-11-20 11:22:21,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:22:21,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:22:21,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:22:21,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:22:21,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:22:21,389 INFO L87 Difference]: Start difference. First operand 3134 states and 13917 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:22,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:22,588 INFO L93 Difference]: Finished difference Result 8235 states and 37130 transitions. [2022-11-20 11:22:22,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:22:22,588 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 11:22:22,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:22,625 INFO L225 Difference]: With dead ends: 8235 [2022-11-20 11:22:22,625 INFO L226 Difference]: Without dead ends: 8235 [2022-11-20 11:22:22,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:22:22,626 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 420 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:22,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 3 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 11:22:22,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8235 states. [2022-11-20 11:22:22,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8235 to 3834. [2022-11-20 11:22:22,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3834 states, 3786 states have (on average 4.708663497094559) internal successors, (17827), 3833 states have internal predecessors, (17827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:22,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3834 states to 3834 states and 17827 transitions. [2022-11-20 11:22:22,773 INFO L78 Accepts]: Start accepts. Automaton has 3834 states and 17827 transitions. Word has length 10 [2022-11-20 11:22:22,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:22,773 INFO L495 AbstractCegarLoop]: Abstraction has 3834 states and 17827 transitions. [2022-11-20 11:22:22,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:22,773 INFO L276 IsEmpty]: Start isEmpty. Operand 3834 states and 17827 transitions. [2022-11-20 11:22:22,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:22:22,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:22,774 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:22,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 11:22:22,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:22:22,980 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:22:22,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:22,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1178204175, now seen corresponding path program 1 times [2022-11-20 11:22:22,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:22:22,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653662485] [2022-11-20 11:22:22,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:22,981 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:22:22,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:22:22,982 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:22:22,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-20 11:22:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:23,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:22:23,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:23,393 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:22:23,393 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:22:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:22:23,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:22:24,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:22:24,171 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:22:24,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653662485] [2022-11-20 11:22:24,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1653662485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:22:24,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:22:24,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:22:24,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958119005] [2022-11-20 11:22:24,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:22:24,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:22:24,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:22:24,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:22:24,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:22:24,173 INFO L87 Difference]: Start difference. First operand 3834 states and 17827 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:26,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:26,339 INFO L93 Difference]: Finished difference Result 6360 states and 29858 transitions. [2022-11-20 11:22:26,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:22:26,340 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 11:22:26,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:26,369 INFO L225 Difference]: With dead ends: 6360 [2022-11-20 11:22:26,369 INFO L226 Difference]: Without dead ends: 6360 [2022-11-20 11:22:26,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:22:26,370 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 345 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:26,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 8 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-20 11:22:26,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6360 states. [2022-11-20 11:22:26,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6360 to 5709. [2022-11-20 11:22:26,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5709 states, 5661 states have (on average 4.872813990461049) internal successors, (27585), 5708 states have internal predecessors, (27585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:26,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5709 states to 5709 states and 27585 transitions. [2022-11-20 11:22:26,550 INFO L78 Accepts]: Start accepts. Automaton has 5709 states and 27585 transitions. Word has length 10 [2022-11-20 11:22:26,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:26,550 INFO L495 AbstractCegarLoop]: Abstraction has 5709 states and 27585 transitions. [2022-11-20 11:22:26,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:26,551 INFO L276 IsEmpty]: Start isEmpty. Operand 5709 states and 27585 transitions. [2022-11-20 11:22:26,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:22:26,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:26,552 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:26,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 11:22:26,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:22:26,766 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:22:26,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:26,766 INFO L85 PathProgramCache]: Analyzing trace with hash -912329054, now seen corresponding path program 1 times [2022-11-20 11:22:26,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:22:26,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808897712] [2022-11-20 11:22:26,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:26,767 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 [2022-11-20 11:22:26,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:22:26,768 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:22:26,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-20 11:22:27,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:27,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 11:22:27,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:27,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:22:27,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:22:27,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:22:27,307 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-20 11:22:27,307 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 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-20 11:22:27,331 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 [2022-11-20 11:22:28,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:22:28,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:22:28,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:22:28,804 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:22:28,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808897712] [2022-11-20 11:22:28,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808897712] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:22:28,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:22:28,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 11:22:28,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577926811] [2022-11-20 11:22:28,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:22:28,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:22:28,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:22:28,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:22:28,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:22:28,806 INFO L87 Difference]: Start difference. First operand 5709 states and 27585 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:30,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:30,713 INFO L93 Difference]: Finished difference Result 15056 states and 73697 transitions. [2022-11-20 11:22:30,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:22:30,714 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 11:22:30,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:30,791 INFO L225 Difference]: With dead ends: 15056 [2022-11-20 11:22:30,791 INFO L226 Difference]: Without dead ends: 15056 [2022-11-20 11:22:30,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:22:30,792 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 363 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 436 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:30,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 15 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 211 Invalid, 0 Unknown, 436 Unchecked, 1.3s Time] [2022-11-20 11:22:30,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15056 states. [2022-11-20 11:22:30,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15056 to 5810. [2022-11-20 11:22:31,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5810 states, 5762 states have (on average 4.847622353349531) internal successors, (27932), 5809 states have internal predecessors, (27932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:31,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5810 states to 5810 states and 27932 transitions. [2022-11-20 11:22:31,033 INFO L78 Accepts]: Start accepts. Automaton has 5810 states and 27932 transitions. Word has length 10 [2022-11-20 11:22:31,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:31,034 INFO L495 AbstractCegarLoop]: Abstraction has 5810 states and 27932 transitions. [2022-11-20 11:22:31,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:31,034 INFO L276 IsEmpty]: Start isEmpty. Operand 5810 states and 27932 transitions. [2022-11-20 11:22:31,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:22:31,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:31,035 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:31,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-11-20 11:22:31,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:22:31,236 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:22:31,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:31,237 INFO L85 PathProgramCache]: Analyzing trace with hash -2013776704, now seen corresponding path program 2 times [2022-11-20 11:22:31,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:22:31,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1849411168] [2022-11-20 11:22:31,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:22:31,237 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 [2022-11-20 11:22:31,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:22:31,238 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:22:31,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:22:31,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:22:31,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:22:31,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 11:22:31,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:31,666 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:22:31,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:22:32,104 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:22:32,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:22:33,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:22:33,427 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:22:33,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1849411168] [2022-11-20 11:22:33,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1849411168] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:22:33,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:22:33,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:22:33,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483479378] [2022-11-20 11:22:33,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:22:33,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:22:33,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:22:33,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:22:33,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:22:33,429 INFO L87 Difference]: Start difference. First operand 5810 states and 27932 transitions. Second operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:52,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:52,858 INFO L93 Difference]: Finished difference Result 17055 states and 78652 transitions. [2022-11-20 11:22:52,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 11:22:52,859 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:22:52,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:52,935 INFO L225 Difference]: With dead ends: 17055 [2022-11-20 11:22:52,935 INFO L226 Difference]: Without dead ends: 17055 [2022-11-20 11:22:52,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2022-11-20 11:22:52,936 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 661 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 1835 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:52,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [661 Valid, 68 Invalid, 1850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1835 Invalid, 0 Unknown, 0 Unchecked, 15.4s Time] [2022-11-20 11:22:52,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17055 states. [2022-11-20 11:22:53,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17055 to 9820. [2022-11-20 11:22:53,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9820 states, 9772 states have (on average 4.826033565288579) internal successors, (47160), 9819 states have internal predecessors, (47160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:53,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9820 states to 9820 states and 47160 transitions. [2022-11-20 11:22:53,285 INFO L78 Accepts]: Start accepts. Automaton has 9820 states and 47160 transitions. Word has length 11 [2022-11-20 11:22:53,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:53,285 INFO L495 AbstractCegarLoop]: Abstraction has 9820 states and 47160 transitions. [2022-11-20 11:22:53,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:53,286 INFO L276 IsEmpty]: Start isEmpty. Operand 9820 states and 47160 transitions. [2022-11-20 11:22:53,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:22:53,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:53,287 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:53,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-20 11:22:53,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:22:53,488 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:22:53,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:53,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1944789921, now seen corresponding path program 1 times [2022-11-20 11:22:53,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:22:53,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777158787] [2022-11-20 11:22:53,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:53,489 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 [2022-11-20 11:22:53,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:22:53,490 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:22:53,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-20 11:22:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:53,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:22:53,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:53,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:22:53,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:22:53,670 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:22:53,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777158787] [2022-11-20 11:22:53,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [777158787] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:22:53,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:22:53,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:22:53,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383778019] [2022-11-20 11:22:53,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:22:53,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:22:53,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:22:53,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:22:53,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:22:53,672 INFO L87 Difference]: Start difference. First operand 9820 states and 47160 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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) [2022-11-20 11:22:53,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:53,891 INFO L93 Difference]: Finished difference Result 8290 states and 39099 transitions. [2022-11-20 11:22:53,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:22:53,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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 [2022-11-20 11:22:53,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:53,923 INFO L225 Difference]: With dead ends: 8290 [2022-11-20 11:22:53,923 INFO L226 Difference]: Without dead ends: 8290 [2022-11-20 11:22:53,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:22:53,924 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:53,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:22:53,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2022-11-20 11:22:54,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 8290. [2022-11-20 11:22:54,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8290 states, 8250 states have (on average 4.739272727272727) internal successors, (39099), 8289 states have internal predecessors, (39099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:54,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8290 states to 8290 states and 39099 transitions. [2022-11-20 11:22:54,134 INFO L78 Accepts]: Start accepts. Automaton has 8290 states and 39099 transitions. Word has length 11 [2022-11-20 11:22:54,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:54,134 INFO L495 AbstractCegarLoop]: Abstraction has 8290 states and 39099 transitions. [2022-11-20 11:22:54,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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) [2022-11-20 11:22:54,135 INFO L276 IsEmpty]: Start isEmpty. Operand 8290 states and 39099 transitions. [2022-11-20 11:22:54,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:22:54,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:54,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:54,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-11-20 11:22:54,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:22:54,338 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:22:54,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:54,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1944789920, now seen corresponding path program 1 times [2022-11-20 11:22:54,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:22:54,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917174784] [2022-11-20 11:22:54,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:54,339 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 [2022-11-20 11:22:54,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:22:54,340 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:22:54,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-20 11:22:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:54,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:22:54,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:54,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:22:54,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:22:54,591 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:22:54,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917174784] [2022-11-20 11:22:54,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917174784] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:22:54,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:22:54,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:22:54,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774168583] [2022-11-20 11:22:54,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:22:54,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:22:54,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:22:54,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:22:54,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:22:54,593 INFO L87 Difference]: Start difference. First operand 8290 states and 39099 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2022-11-20 11:22:54,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:54,809 INFO L93 Difference]: Finished difference Result 6760 states and 31038 transitions. [2022-11-20 11:22:54,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:22:54,810 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 [2022-11-20 11:22:54,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:54,833 INFO L225 Difference]: With dead ends: 6760 [2022-11-20 11:22:54,833 INFO L226 Difference]: Without dead ends: 6760 [2022-11-20 11:22:54,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:22:54,834 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 71 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:54,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 1 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:22:54,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6760 states. [2022-11-20 11:22:55,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6760 to 6760. [2022-11-20 11:22:55,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6760 states, 6728 states have (on average 4.613258026159334) internal successors, (31038), 6759 states have internal predecessors, (31038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:55,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6760 states to 6760 states and 31038 transitions. [2022-11-20 11:22:55,064 INFO L78 Accepts]: Start accepts. Automaton has 6760 states and 31038 transitions. Word has length 11 [2022-11-20 11:22:55,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:55,064 INFO L495 AbstractCegarLoop]: Abstraction has 6760 states and 31038 transitions. [2022-11-20 11:22:55,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2022-11-20 11:22:55,065 INFO L276 IsEmpty]: Start isEmpty. Operand 6760 states and 31038 transitions. [2022-11-20 11:22:55,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:22:55,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:55,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:55,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-20 11:22:55,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:22:55,266 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:22:55,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:55,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1944981125, now seen corresponding path program 1 times [2022-11-20 11:22:55,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:22:55,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293851578] [2022-11-20 11:22:55,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:55,267 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 [2022-11-20 11:22:55,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:22:55,268 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:22:55,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:22:55,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:55,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:22:55,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:55,736 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:22:55,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:22:55,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:22:55,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:22:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:22:56,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:22:56,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1293851578] [2022-11-20 11:22:56,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1293851578] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:22:56,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:22:56,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:22:56,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382622295] [2022-11-20 11:22:56,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:22:56,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:22:56,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:22:56,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:22:56,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:22:56,439 INFO L87 Difference]: Start difference. First operand 6760 states and 31038 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:58,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:58,715 INFO L93 Difference]: Finished difference Result 11570 states and 54043 transitions. [2022-11-20 11:22:58,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:22:58,716 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:22:58,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:58,767 INFO L225 Difference]: With dead ends: 11570 [2022-11-20 11:22:58,767 INFO L226 Difference]: Without dead ends: 11570 [2022-11-20 11:22:58,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:22:58,768 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 214 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:58,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 1 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-20 11:22:58,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11570 states. [2022-11-20 11:22:58,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11570 to 10363. [2022-11-20 11:22:58,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10363 states, 10331 states have (on average 4.819184977252928) internal successors, (49787), 10362 states have internal predecessors, (49787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:59,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10363 states to 10363 states and 49787 transitions. [2022-11-20 11:22:59,022 INFO L78 Accepts]: Start accepts. Automaton has 10363 states and 49787 transitions. Word has length 11 [2022-11-20 11:22:59,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:59,022 INFO L495 AbstractCegarLoop]: Abstraction has 10363 states and 49787 transitions. [2022-11-20 11:22:59,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:59,022 INFO L276 IsEmpty]: Start isEmpty. Operand 10363 states and 49787 transitions. [2022-11-20 11:22:59,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:22:59,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:59,024 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:59,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 11:22:59,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:22:59,224 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:22:59,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:59,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1780661220, now seen corresponding path program 2 times [2022-11-20 11:22:59,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:22:59,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1749379938] [2022-11-20 11:22:59,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:22:59,225 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 [2022-11-20 11:22:59,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:22:59,226 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:22:59,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:22:59,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:22:59,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:22:59,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:22:59,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:59,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:22:59,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:22:59,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:22:59,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:22:59,618 INFO L321 Elim1Store]: treesize reduction 74, result has 36.8 percent of original size [2022-11-20 11:22:59,619 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 4 case distinctions, treesize of input 20 treesize of output 50 [2022-11-20 11:22:59,670 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-20 11:22:59,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 81 [2022-11-20 11:22:59,957 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 11:22:59,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:22:59,958 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:22:59,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1749379938] [2022-11-20 11:22:59,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1749379938] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:22:59,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:22:59,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:22:59,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220070916] [2022-11-20 11:22:59,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:22:59,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:22:59,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:22:59,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:22:59,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:22:59,959 INFO L87 Difference]: Start difference. First operand 10363 states and 49787 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:23:00,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:23:00,142 INFO L93 Difference]: Finished difference Result 10359 states and 49770 transitions. [2022-11-20 11:23:00,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:23:00,143 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:23:00,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:23:00,185 INFO L225 Difference]: With dead ends: 10359 [2022-11-20 11:23:00,185 INFO L226 Difference]: Without dead ends: 10359 [2022-11-20 11:23:00,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:23:00,188 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:23:00,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-11-20 11:23:00,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10359 states. [2022-11-20 11:23:00,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10359 to 10359. [2022-11-20 11:23:00,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10359 states, 10327 states have (on average 4.819405442045125) internal successors, (49770), 10358 states have internal predecessors, (49770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:23:00,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10359 states to 10359 states and 49770 transitions. [2022-11-20 11:23:00,483 INFO L78 Accepts]: Start accepts. Automaton has 10359 states and 49770 transitions. Word has length 11 [2022-11-20 11:23:00,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:23:00,483 INFO L495 AbstractCegarLoop]: Abstraction has 10359 states and 49770 transitions. [2022-11-20 11:23:00,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:23:00,484 INFO L276 IsEmpty]: Start isEmpty. Operand 10359 states and 49770 transitions. [2022-11-20 11:23:00,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:23:00,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:23:00,485 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:23:00,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 11:23:00,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:23:00,688 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:23:00,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:23:00,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1986319384, now seen corresponding path program 2 times [2022-11-20 11:23:00,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:23:00,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1876154892] [2022-11-20 11:23:00,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:23:00,689 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 [2022-11-20 11:23:00,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:23:00,690 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:23:00,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:23:00,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:23:00,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:23:00,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:23:00,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:23:00,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:23:01,134 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-20 11:23:01,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-20 11:23:01,161 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 1718 treesize of output 1694 [2022-11-20 11:23:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:23:01,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:23:01,313 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:23:01,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1876154892] [2022-11-20 11:23:01,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1876154892] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:23:01,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:23:01,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:23:01,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030620301] [2022-11-20 11:23:01,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:23:01,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:23:01,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:23:01,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:23:01,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:23:01,315 INFO L87 Difference]: Start difference. First operand 10359 states and 49770 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:23:01,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:23:01,553 INFO L93 Difference]: Finished difference Result 9423 states and 45075 transitions. [2022-11-20 11:23:01,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:23:01,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:23:01,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:23:01,587 INFO L225 Difference]: With dead ends: 9423 [2022-11-20 11:23:01,587 INFO L226 Difference]: Without dead ends: 9423 [2022-11-20 11:23:01,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:23:01,587 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 32 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:23:01,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 1 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:23:01,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9423 states. [2022-11-20 11:23:01,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9423 to 8501. [2022-11-20 11:23:01,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8501 states, 8477 states have (on average 4.797923793794975) internal successors, (40672), 8500 states have internal predecessors, (40672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:23:01,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8501 states to 8501 states and 40672 transitions. [2022-11-20 11:23:01,918 INFO L78 Accepts]: Start accepts. Automaton has 8501 states and 40672 transitions. Word has length 11 [2022-11-20 11:23:01,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:23:01,918 INFO L495 AbstractCegarLoop]: Abstraction has 8501 states and 40672 transitions. [2022-11-20 11:23:01,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:23:01,918 INFO L276 IsEmpty]: Start isEmpty. Operand 8501 states and 40672 transitions. [2022-11-20 11:23:01,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:23:01,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:23:01,920 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:23:01,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-20 11:23:02,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:23:02,120 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:23:02,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:23:02,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1058770562, now seen corresponding path program 2 times [2022-11-20 11:23:02,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:23:02,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [305914670] [2022-11-20 11:23:02,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:23:02,121 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 [2022-11-20 11:23:02,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:23:02,122 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:23:02,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:23:02,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:23:02,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:23:02,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 11:23:02,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:23:02,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:23:02,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:23:02,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:23:02,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:23:02,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:23:02,511 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2022-11-20 11:23:02,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-11-20 11:23:02,551 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-20 11:23:02,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2022-11-20 11:23:02,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 11:23:02,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:23:02,806 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:23:02,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [305914670] [2022-11-20 11:23:02,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [305914670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:23:02,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:23:02,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:23:02,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350266290] [2022-11-20 11:23:02,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:23:02,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:23:02,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:23:02,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:23:02,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:23:02,808 INFO L87 Difference]: Start difference. First operand 8501 states and 40672 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) [2022-11-20 11:23:02,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:23:02,967 INFO L93 Difference]: Finished difference Result 8500 states and 40670 transitions. [2022-11-20 11:23:02,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:23:02,968 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 12 [2022-11-20 11:23:02,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:23:03,007 INFO L225 Difference]: With dead ends: 8500 [2022-11-20 11:23:03,007 INFO L226 Difference]: Without dead ends: 8500 [2022-11-20 11:23:03,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:23:03,008 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:23:03,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 67 Unchecked, 0.1s Time] [2022-11-20 11:23:03,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8500 states. [2022-11-20 11:23:03,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8500 to 8496. [2022-11-20 11:23:03,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8496 states, 8473 states have (on average 4.799008615602502) internal successors, (40662), 8495 states have internal predecessors, (40662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:23:03,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8496 states to 8496 states and 40662 transitions. [2022-11-20 11:23:03,221 INFO L78 Accepts]: Start accepts. Automaton has 8496 states and 40662 transitions. Word has length 12 [2022-11-20 11:23:03,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:23:03,222 INFO L495 AbstractCegarLoop]: Abstraction has 8496 states and 40662 transitions. [2022-11-20 11:23:03,222 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) [2022-11-20 11:23:03,222 INFO L276 IsEmpty]: Start isEmpty. Operand 8496 states and 40662 transitions. [2022-11-20 11:23:03,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:23:03,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:23:03,223 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-20 11:23:03,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-11-20 11:23:03,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:23:03,424 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:23:03,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:23:03,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1263166567, now seen corresponding path program 3 times [2022-11-20 11:23:03,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:23:03,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078642466] [2022-11-20 11:23:03,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:23:03,425 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:23:03,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:23:03,426 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:23:03,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-20 11:23:03,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 11:23:03,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:23:03,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:23:03,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:23:04,040 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:23:04,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:23:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:23:04,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:23:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:23:08,135 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:23:08,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078642466] [2022-11-20 11:23:08,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078642466] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:23:08,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:23:08,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-20 11:23:08,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907622887] [2022-11-20 11:23:08,138 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:23:08,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 11:23:08,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:23:08,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 11:23:08,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:23:08,139 INFO L87 Difference]: Start difference. First operand 8496 states and 40662 transitions. Second operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:23:44,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:23:44,578 INFO L93 Difference]: Finished difference Result 98704 states and 477420 transitions. [2022-11-20 11:23:44,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 11:23:44,579 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 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 [2022-11-20 11:23:44,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:23:45,171 INFO L225 Difference]: With dead ends: 98704 [2022-11-20 11:23:45,171 INFO L226 Difference]: Without dead ends: 98704 [2022-11-20 11:23:45,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:23:45,172 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 4949 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 4377 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4949 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 4399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 4377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:23:45,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4949 Valid, 120 Invalid, 4399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 4377 Invalid, 0 Unknown, 0 Unchecked, 18.2s Time] [2022-11-20 11:23:45,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98704 states. [2022-11-20 11:23:47,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98704 to 8508. [2022-11-20 11:23:47,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8508 states, 8485 states have (on average 4.795050088391279) internal successors, (40686), 8507 states have internal predecessors, (40686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:23:47,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8508 states to 8508 states and 40686 transitions. [2022-11-20 11:23:47,823 INFO L78 Accepts]: Start accepts. Automaton has 8508 states and 40686 transitions. Word has length 12 [2022-11-20 11:23:47,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:23:47,825 INFO L495 AbstractCegarLoop]: Abstraction has 8508 states and 40686 transitions. [2022-11-20 11:23:47,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:23:47,825 INFO L276 IsEmpty]: Start isEmpty. Operand 8508 states and 40686 transitions. [2022-11-20 11:23:47,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:23:47,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:23:47,827 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:23:47,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-20 11:23:48,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:23:48,028 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:23:48,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:23:48,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1411712178, now seen corresponding path program 2 times [2022-11-20 11:23:48,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:23:48,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1097316257] [2022-11-20 11:23:48,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:23:48,029 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 [2022-11-20 11:23:48,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:23:48,030 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:23:48,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-20 11:23:48,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:23:48,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:23:48,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 11:23:48,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:23:48,566 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:23:48,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:23:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:23:49,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:23:50,686 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:23:50,686 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:23:50,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1097316257] [2022-11-20 11:23:50,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1097316257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:23:50,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:23:50,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:23:50,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887118923] [2022-11-20 11:23:50,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:23:50,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:23:50,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:23:50,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:23:50,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:23:50,688 INFO L87 Difference]: Start difference. First operand 8508 states and 40686 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:07,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:24:07,156 INFO L93 Difference]: Finished difference Result 14016 states and 64562 transitions. [2022-11-20 11:24:07,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 11:24:07,157 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 11:24:07,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:24:07,210 INFO L225 Difference]: With dead ends: 14016 [2022-11-20 11:24:07,210 INFO L226 Difference]: Without dead ends: 14016 [2022-11-20 11:24:07,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2022-11-20 11:24:07,211 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 597 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 1652 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:24:07,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 68 Invalid, 1667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1652 Invalid, 0 Unknown, 0 Unchecked, 12.4s Time] [2022-11-20 11:24:07,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14016 states. [2022-11-20 11:24:07,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14016 to 9834. [2022-11-20 11:24:07,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9834 states, 9811 states have (on average 4.726735297115483) internal successors, (46374), 9833 states have internal predecessors, (46374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:07,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9834 states to 9834 states and 46374 transitions. [2022-11-20 11:24:07,566 INFO L78 Accepts]: Start accepts. Automaton has 9834 states and 46374 transitions. Word has length 13 [2022-11-20 11:24:07,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:24:07,567 INFO L495 AbstractCegarLoop]: Abstraction has 9834 states and 46374 transitions. [2022-11-20 11:24:07,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:07,567 INFO L276 IsEmpty]: Start isEmpty. Operand 9834 states and 46374 transitions. [2022-11-20 11:24:07,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:24:07,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:24:07,568 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1] [2022-11-20 11:24:07,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-20 11:24:07,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:24:07,769 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:24:07,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:07,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1537820182, now seen corresponding path program 3 times [2022-11-20 11:24:07,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:24:07,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1885125228] [2022-11-20 11:24:07,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:24:07,770 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 [2022-11-20 11:24:07,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:24:07,771 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:24:07,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-20 11:24:08,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 11:24:08,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:24:08,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:24:08,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:24:08,344 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:24:08,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:24:08,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 10 [2022-11-20 11:24:08,832 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 7 treesize of output 5 [2022-11-20 11:24:08,843 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:08,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:24:09,006 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 8 treesize of output 6 [2022-11-20 11:24:09,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-20 11:24:09,056 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-20 11:24:11,401 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:11,401 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:24:11,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1885125228] [2022-11-20 11:24:11,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1885125228] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:24:11,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:24:11,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-20 11:24:11,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503818000] [2022-11-20 11:24:11,402 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:24:11,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 11:24:11,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:24:11,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 11:24:11,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:24:11,404 INFO L87 Difference]: Start difference. First operand 9834 states and 46374 transitions. Second operand has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:27,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:24:27,518 INFO L93 Difference]: Finished difference Result 21016 states and 102374 transitions. [2022-11-20 11:24:27,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 11:24:27,520 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 11:24:27,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:24:27,618 INFO L225 Difference]: With dead ends: 21016 [2022-11-20 11:24:27,618 INFO L226 Difference]: Without dead ends: 21016 [2022-11-20 11:24:27,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2022-11-20 11:24:27,619 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 269 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1675 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:24:27,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 89 Invalid, 1884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1675 Invalid, 0 Unknown, 200 Unchecked, 14.2s Time] [2022-11-20 11:24:27,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21016 states. [2022-11-20 11:24:28,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21016 to 15010. [2022-11-20 11:24:28,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15010 states, 14987 states have (on average 4.889904583972776) internal successors, (73285), 15009 states have internal predecessors, (73285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:28,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15010 states to 15010 states and 73285 transitions. [2022-11-20 11:24:28,305 INFO L78 Accepts]: Start accepts. Automaton has 15010 states and 73285 transitions. Word has length 13 [2022-11-20 11:24:28,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:24:28,305 INFO L495 AbstractCegarLoop]: Abstraction has 15010 states and 73285 transitions. [2022-11-20 11:24:28,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:28,306 INFO L276 IsEmpty]: Start isEmpty. Operand 15010 states and 73285 transitions. [2022-11-20 11:24:28,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:24:28,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:24:28,310 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:24:28,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-11-20 11:24:28,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:24:28,526 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:24:28,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:28,526 INFO L85 PathProgramCache]: Analyzing trace with hash 475268047, now seen corresponding path program 2 times [2022-11-20 11:24:28,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:24:28,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859424733] [2022-11-20 11:24:28,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:24:28,527 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 [2022-11-20 11:24:28,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:24:28,528 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:24:28,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-20 11:24:28,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:24:28,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:24:28,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:24:28,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:24:29,035 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:24:29,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:24:29,706 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:29,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:24:31,356 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:31,357 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:24:31,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859424733] [2022-11-20 11:24:31,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859424733] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:24:31,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:24:31,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:24:31,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141222444] [2022-11-20 11:24:31,357 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:24:31,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:24:31,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:24:31,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:24:31,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:24:31,358 INFO L87 Difference]: Start difference. First operand 15010 states and 73285 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:33,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:24:33,936 INFO L93 Difference]: Finished difference Result 15008 states and 73275 transitions. [2022-11-20 11:24:33,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:24:33,937 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 11:24:33,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:24:34,002 INFO L225 Difference]: With dead ends: 15008 [2022-11-20 11:24:34,002 INFO L226 Difference]: Without dead ends: 15008 [2022-11-20 11:24:34,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:24:34,002 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:24:34,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 5 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 276 Invalid, 0 Unknown, 83 Unchecked, 1.6s Time] [2022-11-20 11:24:34,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15008 states. [2022-11-20 11:24:34,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15008 to 15008. [2022-11-20 11:24:34,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15008 states, 14985 states have (on average 4.88988988988989) internal successors, (73275), 15007 states have internal predecessors, (73275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:34,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15008 states to 15008 states and 73275 transitions. [2022-11-20 11:24:34,411 INFO L78 Accepts]: Start accepts. Automaton has 15008 states and 73275 transitions. Word has length 14 [2022-11-20 11:24:34,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:24:34,411 INFO L495 AbstractCegarLoop]: Abstraction has 15008 states and 73275 transitions. [2022-11-20 11:24:34,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:34,411 INFO L276 IsEmpty]: Start isEmpty. Operand 15008 states and 73275 transitions. [2022-11-20 11:24:34,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:24:34,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:24:34,413 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:24:34,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-20 11:24:34,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:24:34,614 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:24:34,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:34,614 INFO L85 PathProgramCache]: Analyzing trace with hash -437016523, now seen corresponding path program 1 times [2022-11-20 11:24:34,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:24:34,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967272377] [2022-11-20 11:24:34,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:34,615 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 [2022-11-20 11:24:34,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:24:34,616 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:24:34,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-20 11:24:34,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:34,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 11:24:34,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:24:35,217 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:24:35,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:24:35,756 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:35,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:24:37,613 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:37,614 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:24:37,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967272377] [2022-11-20 11:24:37,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967272377] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:24:37,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:24:37,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-20 11:24:37,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465088074] [2022-11-20 11:24:37,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:24:37,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 11:24:37,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:24:37,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 11:24:37,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:24:37,615 INFO L87 Difference]: Start difference. First operand 15008 states and 73275 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:03,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:25:03,578 INFO L93 Difference]: Finished difference Result 33508 states and 158787 transitions. [2022-11-20 11:25:03,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 11:25:03,580 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 11:25:03,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:25:03,890 INFO L225 Difference]: With dead ends: 33508 [2022-11-20 11:25:03,891 INFO L226 Difference]: Without dead ends: 33508 [2022-11-20 11:25:03,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=437, Invalid=1285, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 11:25:03,893 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1292 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 2624 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1292 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 2649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:25:03,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1292 Valid, 115 Invalid, 2649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2624 Invalid, 0 Unknown, 0 Unchecked, 18.8s Time] [2022-11-20 11:25:03,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33508 states. [2022-11-20 11:25:04,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33508 to 15960. [2022-11-20 11:25:04,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15960 states, 15937 states have (on average 4.915228713057664) internal successors, (78334), 15959 states have internal predecessors, (78334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:04,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15960 states to 15960 states and 78334 transitions. [2022-11-20 11:25:04,804 INFO L78 Accepts]: Start accepts. Automaton has 15960 states and 78334 transitions. Word has length 14 [2022-11-20 11:25:04,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:25:04,805 INFO L495 AbstractCegarLoop]: Abstraction has 15960 states and 78334 transitions. [2022-11-20 11:25:04,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:04,805 INFO L276 IsEmpty]: Start isEmpty. Operand 15960 states and 78334 transitions. [2022-11-20 11:25:04,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:25:04,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:25:04,809 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-11-20 11:25:04,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-20 11:25:05,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:25:05,023 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:25:05,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:25:05,023 INFO L85 PathProgramCache]: Analyzing trace with hash -400266753, now seen corresponding path program 4 times [2022-11-20 11:25:05,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:25:05,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302940594] [2022-11-20 11:25:05,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:25:05,024 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 [2022-11-20 11:25:05,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:25:05,025 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:25:05,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-20 11:25:05,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:25:05,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:25:05,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 11:25:05,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:25:05,607 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:25:05,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:25:06,335 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:25:06,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:25:08,857 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:25:08,858 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:25:08,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302940594] [2022-11-20 11:25:08,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302940594] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:25:08,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:25:08,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-20 11:25:08,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483687591] [2022-11-20 11:25:08,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:25:08,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 11:25:08,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:25:08,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 11:25:08,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:25:08,859 INFO L87 Difference]: Start difference. First operand 15960 states and 78334 transitions. Second operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:50,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:25:50,477 INFO L93 Difference]: Finished difference Result 28656 states and 133090 transitions. [2022-11-20 11:25:50,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-20 11:25:50,478 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 11:25:50,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:25:50,605 INFO L225 Difference]: With dead ends: 28656 [2022-11-20 11:25:50,605 INFO L226 Difference]: Without dead ends: 28656 [2022-11-20 11:25:50,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=528, Invalid=2334, Unknown=0, NotChecked=0, Total=2862 [2022-11-20 11:25:50,606 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2017 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 4949 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2017 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 4991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 4949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:25:50,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2017 Valid, 236 Invalid, 4991 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [42 Valid, 4949 Invalid, 0 Unknown, 0 Unchecked, 29.1s Time] [2022-11-20 11:25:50,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28656 states. [2022-11-20 11:25:51,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28656 to 15027. [2022-11-20 11:25:51,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15027 states, 15004 states have (on average 4.817581978139163) internal successors, (72283), 15026 states have internal predecessors, (72283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:51,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15027 states to 15027 states and 72283 transitions. [2022-11-20 11:25:51,232 INFO L78 Accepts]: Start accepts. Automaton has 15027 states and 72283 transitions. Word has length 14 [2022-11-20 11:25:51,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:25:51,232 INFO L495 AbstractCegarLoop]: Abstraction has 15027 states and 72283 transitions. [2022-11-20 11:25:51,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:51,232 INFO L276 IsEmpty]: Start isEmpty. Operand 15027 states and 72283 transitions. [2022-11-20 11:25:51,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:25:51,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:25:51,236 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:25:51,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-20 11:25:51,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:25:51,442 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:25:51,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:25:51,442 INFO L85 PathProgramCache]: Analyzing trace with hash -2109198622, now seen corresponding path program 2 times [2022-11-20 11:25:51,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:25:51,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [762626549] [2022-11-20 11:25:51,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:25:51,443 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 [2022-11-20 11:25:51,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:25:51,444 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:25:51,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-20 11:25:51,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:25:51,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:25:51,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:25:51,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:25:51,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:25:51,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:25:51,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:25:52,013 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-20 11:25:52,013 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 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-20 11:25:52,040 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 [2022-11-20 11:25:52,358 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 11:25:52,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:25:52,358 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:25:52,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [762626549] [2022-11-20 11:25:52,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [762626549] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:25:52,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:25:52,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:25:52,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083422167] [2022-11-20 11:25:52,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:25:52,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:25:52,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:25:52,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:25:52,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:25:52,360 INFO L87 Difference]: Start difference. First operand 15027 states and 72283 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:52,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:25:52,689 INFO L93 Difference]: Finished difference Result 15026 states and 72280 transitions. [2022-11-20 11:25:52,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:25:52,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 11:25:52,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:25:52,745 INFO L225 Difference]: With dead ends: 15026 [2022-11-20 11:25:52,745 INFO L226 Difference]: Without dead ends: 15026 [2022-11-20 11:25:52,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:25:52,746 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:25:52,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-11-20 11:25:52,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15026 states. [2022-11-20 11:25:53,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15026 to 15026. [2022-11-20 11:25:53,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15026 states, 15003 states have (on average 4.817703126041458) internal successors, (72280), 15025 states have internal predecessors, (72280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:53,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15026 states to 15026 states and 72280 transitions. [2022-11-20 11:25:53,217 INFO L78 Accepts]: Start accepts. Automaton has 15026 states and 72280 transitions. Word has length 14 [2022-11-20 11:25:53,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:25:53,217 INFO L495 AbstractCegarLoop]: Abstraction has 15026 states and 72280 transitions. [2022-11-20 11:25:53,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:53,218 INFO L276 IsEmpty]: Start isEmpty. Operand 15026 states and 72280 transitions. [2022-11-20 11:25:53,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:25:53,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:25:53,221 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:25:53,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-20 11:25:53,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:25:53,424 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:25:53,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:25:53,425 INFO L85 PathProgramCache]: Analyzing trace with hash -2102632264, now seen corresponding path program 1 times [2022-11-20 11:25:53,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:25:53,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60538664] [2022-11-20 11:25:53,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:25:53,426 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 [2022-11-20 11:25:53,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:25:53,427 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:25:53,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-20 11:25:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:53,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 11:25:53,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:25:53,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:25:53,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:25:53,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:25:53,960 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-20 11:25:53,960 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 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-20 11:25:53,991 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 [2022-11-20 11:25:55,123 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:25:55,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:25:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:25:57,005 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:25:57,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60538664] [2022-11-20 11:25:57,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60538664] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:25:57,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:25:57,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-20 11:25:57,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326528946] [2022-11-20 11:25:57,006 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:25:57,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 11:25:57,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:25:57,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 11:25:57,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:25:57,007 INFO L87 Difference]: Start difference. First operand 15026 states and 72280 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:01,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:26:01,212 INFO L93 Difference]: Finished difference Result 19405 states and 92982 transitions. [2022-11-20 11:26:01,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 11:26:01,213 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 11:26:01,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:26:01,292 INFO L225 Difference]: With dead ends: 19405 [2022-11-20 11:26:01,292 INFO L226 Difference]: Without dead ends: 19405 [2022-11-20 11:26:01,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2022-11-20 11:26:01,292 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 279 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 1285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 730 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:26:01,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 27 Invalid, 1285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 552 Invalid, 0 Unknown, 730 Unchecked, 1.8s Time] [2022-11-20 11:26:01,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19405 states. [2022-11-20 11:26:01,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19405 to 15026. [2022-11-20 11:26:01,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15026 states, 15003 states have (on average 4.817703126041458) internal successors, (72280), 15025 states have internal predecessors, (72280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:01,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15026 states to 15026 states and 72280 transitions. [2022-11-20 11:26:01,768 INFO L78 Accepts]: Start accepts. Automaton has 15026 states and 72280 transitions. Word has length 14 [2022-11-20 11:26:01,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:26:01,769 INFO L495 AbstractCegarLoop]: Abstraction has 15026 states and 72280 transitions. [2022-11-20 11:26:01,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:01,769 INFO L276 IsEmpty]: Start isEmpty. Operand 15026 states and 72280 transitions. [2022-11-20 11:26:01,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:26:01,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:26:01,772 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:26:01,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-20 11:26:01,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:26:01,980 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:26:01,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:26:01,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1212604014, now seen corresponding path program 1 times [2022-11-20 11:26:01,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:26:01,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1444545512] [2022-11-20 11:26:01,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:26:01,980 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 [2022-11-20 11:26:01,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:26:01,981 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:26:01,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-20 11:26:02,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:02,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:26:02,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:26:02,489 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:26:02,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:26:02,871 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:02,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:26:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:04,808 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:26:04,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1444545512] [2022-11-20 11:26:04,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1444545512] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:26:04,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:26:04,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:26:04,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408719458] [2022-11-20 11:26:04,808 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:26:04,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:26:04,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:26:04,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:26:04,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:26:04,809 INFO L87 Difference]: Start difference. First operand 15026 states and 72280 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:07,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:26:07,471 INFO L93 Difference]: Finished difference Result 15039 states and 72341 transitions. [2022-11-20 11:26:07,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:26:07,473 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 11:26:07,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:26:07,700 INFO L225 Difference]: With dead ends: 15039 [2022-11-20 11:26:07,700 INFO L226 Difference]: Without dead ends: 15039 [2022-11-20 11:26:07,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:26:07,701 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 6 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:26:07,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 4 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 238 Invalid, 0 Unknown, 106 Unchecked, 1.6s Time] [2022-11-20 11:26:07,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15039 states. [2022-11-20 11:26:08,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15039 to 15038. [2022-11-20 11:26:08,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15038 states, 15015 states have (on average 4.817582417582417) internal successors, (72336), 15037 states have internal predecessors, (72336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:08,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15038 states to 15038 states and 72336 transitions. [2022-11-20 11:26:08,204 INFO L78 Accepts]: Start accepts. Automaton has 15038 states and 72336 transitions. Word has length 15 [2022-11-20 11:26:08,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:26:08,204 INFO L495 AbstractCegarLoop]: Abstraction has 15038 states and 72336 transitions. [2022-11-20 11:26:08,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:08,204 INFO L276 IsEmpty]: Start isEmpty. Operand 15038 states and 72336 transitions. [2022-11-20 11:26:08,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:26:08,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:26:08,206 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:26:08,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-20 11:26:08,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:26:08,407 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:26:08,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:26:08,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1623627228, now seen corresponding path program 1 times [2022-11-20 11:26:08,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:26:08,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776573435] [2022-11-20 11:26:08,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:26:08,408 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 [2022-11-20 11:26:08,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:26:08,409 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:26:08,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-20 11:26:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:08,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:26:08,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:26:08,914 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:26:08,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:26:09,263 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:09,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:26:10,890 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:10,891 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:26:10,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776573435] [2022-11-20 11:26:10,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776573435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:26:10,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:26:10,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:26:10,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988698238] [2022-11-20 11:26:10,891 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:26:10,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:26:10,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:26:10,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:26:10,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:26:10,892 INFO L87 Difference]: Start difference. First operand 15038 states and 72336 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:12,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:26:12,408 INFO L93 Difference]: Finished difference Result 15051 states and 72397 transitions. [2022-11-20 11:26:12,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:26:12,409 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 11:26:12,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:26:12,485 INFO L225 Difference]: With dead ends: 15051 [2022-11-20 11:26:12,485 INFO L226 Difference]: Without dead ends: 15051 [2022-11-20 11:26:12,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:26:12,486 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 6 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:26:12,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 3 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 117 Invalid, 0 Unknown, 72 Unchecked, 0.6s Time] [2022-11-20 11:26:12,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15051 states. [2022-11-20 11:26:12,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15051 to 15050. [2022-11-20 11:26:13,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15050 states, 15027 states have (on average 4.817461901909896) internal successors, (72392), 15049 states have internal predecessors, (72392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:13,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15050 states to 15050 states and 72392 transitions. [2022-11-20 11:26:13,116 INFO L78 Accepts]: Start accepts. Automaton has 15050 states and 72392 transitions. Word has length 15 [2022-11-20 11:26:13,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:26:13,117 INFO L495 AbstractCegarLoop]: Abstraction has 15050 states and 72392 transitions. [2022-11-20 11:26:13,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:13,117 INFO L276 IsEmpty]: Start isEmpty. Operand 15050 states and 72392 transitions. [2022-11-20 11:26:13,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:26:13,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:26:13,122 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:26:13,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Ended with exit code 0 [2022-11-20 11:26:13,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:26:13,323 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:26:13,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:26:13,323 INFO L85 PathProgramCache]: Analyzing trace with hash -353654272, now seen corresponding path program 1 times [2022-11-20 11:26:13,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:26:13,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421980479] [2022-11-20 11:26:13,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:26:13,324 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 [2022-11-20 11:26:13,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:26:13,325 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:26:13,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-20 11:26:13,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:13,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:26:13,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:26:13,920 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:26:13,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:26:14,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:14,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:26:16,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:16,367 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:26:16,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421980479] [2022-11-20 11:26:16,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421980479] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:26:16,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:26:16,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:26:16,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592505100] [2022-11-20 11:26:16,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:26:16,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:26:16,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:26:16,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:26:16,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:26:16,369 INFO L87 Difference]: Start difference. First operand 15050 states and 72392 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:17,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:26:17,707 INFO L93 Difference]: Finished difference Result 15063 states and 72453 transitions. [2022-11-20 11:26:17,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:26:17,708 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 11:26:17,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:26:17,776 INFO L225 Difference]: With dead ends: 15063 [2022-11-20 11:26:17,776 INFO L226 Difference]: Without dead ends: 15063 [2022-11-20 11:26:17,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:26:17,777 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 6 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:26:17,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 3 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 117 Invalid, 0 Unknown, 108 Unchecked, 0.6s Time] [2022-11-20 11:26:17,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15063 states. [2022-11-20 11:26:18,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15063 to 15062. [2022-11-20 11:26:18,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15062 states, 15039 states have (on average 4.817341578562404) internal successors, (72448), 15061 states have internal predecessors, (72448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:18,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15062 states to 15062 states and 72448 transitions. [2022-11-20 11:26:18,464 INFO L78 Accepts]: Start accepts. Automaton has 15062 states and 72448 transitions. Word has length 15 [2022-11-20 11:26:18,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:26:18,464 INFO L495 AbstractCegarLoop]: Abstraction has 15062 states and 72448 transitions. [2022-11-20 11:26:18,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:18,464 INFO L276 IsEmpty]: Start isEmpty. Operand 15062 states and 72448 transitions. [2022-11-20 11:26:18,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:26:18,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:26:18,466 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:26:18,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-20 11:26:18,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:26:18,667 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:26:18,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:26:18,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1788085052, now seen corresponding path program 2 times [2022-11-20 11:26:18,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:26:18,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207313088] [2022-11-20 11:26:18,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:26:18,669 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 [2022-11-20 11:26:18,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:26:18,670 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:26:18,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-20 11:26:18,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:26:18,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:26:18,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:26:18,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:26:19,256 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:26:19,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:26:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:19,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:26:21,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:21,252 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:26:21,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [207313088] [2022-11-20 11:26:21,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [207313088] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:26:21,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:26:21,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:26:21,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480879311] [2022-11-20 11:26:21,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:26:21,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:26:21,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:26:21,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:26:21,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:26:21,254 INFO L87 Difference]: Start difference. First operand 15062 states and 72448 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:22,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:26:22,833 INFO L93 Difference]: Finished difference Result 15085 states and 72563 transitions. [2022-11-20 11:26:22,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:26:22,834 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 11:26:22,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:26:22,910 INFO L225 Difference]: With dead ends: 15085 [2022-11-20 11:26:22,910 INFO L226 Difference]: Without dead ends: 15085 [2022-11-20 11:26:22,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:26:22,910 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 8 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:26:22,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 3 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 150 Invalid, 0 Unknown, 87 Unchecked, 0.7s Time] [2022-11-20 11:26:22,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15085 states. [2022-11-20 11:26:23,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15085 to 15083. [2022-11-20 11:26:23,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15083 states, 15060 states have (on average 4.817729083665339) internal successors, (72555), 15082 states have internal predecessors, (72555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:23,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15083 states to 15083 states and 72555 transitions. [2022-11-20 11:26:23,448 INFO L78 Accepts]: Start accepts. Automaton has 15083 states and 72555 transitions. Word has length 15 [2022-11-20 11:26:23,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:26:23,449 INFO L495 AbstractCegarLoop]: Abstraction has 15083 states and 72555 transitions. [2022-11-20 11:26:23,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:23,449 INFO L276 IsEmpty]: Start isEmpty. Operand 15083 states and 72555 transitions. [2022-11-20 11:26:23,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:26:23,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:26:23,452 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:26:23,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-20 11:26:23,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:26:23,653 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:26:23,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:26:23,653 INFO L85 PathProgramCache]: Analyzing trace with hash -11888398, now seen corresponding path program 2 times [2022-11-20 11:26:23,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:26:23,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398090224] [2022-11-20 11:26:23,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:26:23,653 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 [2022-11-20 11:26:23,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:26:23,654 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:26:23,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-20 11:26:23,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:26:23,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:26:23,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:26:23,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:26:24,197 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:26:24,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:26:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:24,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:26:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:26,636 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:26:26,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1398090224] [2022-11-20 11:26:26,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1398090224] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:26:26,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:26:26,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:26:26,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97521600] [2022-11-20 11:26:26,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:26:26,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:26:26,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:26:26,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:26:26,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:26:26,638 INFO L87 Difference]: Start difference. First operand 15083 states and 72555 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:28,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:26:28,264 INFO L93 Difference]: Finished difference Result 15109 states and 72690 transitions. [2022-11-20 11:26:28,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:26:28,265 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 11:26:28,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:26:28,338 INFO L225 Difference]: With dead ends: 15109 [2022-11-20 11:26:28,338 INFO L226 Difference]: Without dead ends: 15109 [2022-11-20 11:26:28,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:26:28,339 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 9 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:26:28,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 3 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 140 Invalid, 0 Unknown, 111 Unchecked, 0.8s Time] [2022-11-20 11:26:28,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15109 states. [2022-11-20 11:26:28,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15109 to 15107. [2022-11-20 11:26:28,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15107 states, 15084 states have (on average 4.818483160965261) internal successors, (72682), 15106 states have internal predecessors, (72682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:28,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15107 states to 15107 states and 72682 transitions. [2022-11-20 11:26:28,825 INFO L78 Accepts]: Start accepts. Automaton has 15107 states and 72682 transitions. Word has length 15 [2022-11-20 11:26:28,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:26:28,825 INFO L495 AbstractCegarLoop]: Abstraction has 15107 states and 72682 transitions. [2022-11-20 11:26:28,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:28,825 INFO L276 IsEmpty]: Start isEmpty. Operand 15107 states and 72682 transitions. [2022-11-20 11:26:28,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:26:28,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:26:28,827 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:26:28,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-20 11:26:29,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:26:29,028 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:26:29,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:26:29,029 INFO L85 PathProgramCache]: Analyzing trace with hash 503436320, now seen corresponding path program 2 times [2022-11-20 11:26:29,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:26:29,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255790018] [2022-11-20 11:26:29,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:26:29,030 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 [2022-11-20 11:26:29,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:26:29,031 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:26:29,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-20 11:26:29,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:26:29,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:26:29,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:26:29,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:26:29,622 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:26:29,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:26:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:30,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:26:31,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:31,900 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:26:31,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255790018] [2022-11-20 11:26:31,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255790018] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:26:31,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:26:31,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:26:31,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559950229] [2022-11-20 11:26:31,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:26:31,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:26:31,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:26:31,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:26:31,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:26:31,903 INFO L87 Difference]: Start difference. First operand 15107 states and 72682 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:35,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:26:35,697 INFO L93 Difference]: Finished difference Result 15223 states and 73267 transitions. [2022-11-20 11:26:35,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:26:35,698 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 11:26:35,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:26:35,781 INFO L225 Difference]: With dead ends: 15223 [2022-11-20 11:26:35,782 INFO L226 Difference]: Without dead ends: 15223 [2022-11-20 11:26:35,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:26:35,782 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 61 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:26:35,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 5 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 400 Invalid, 0 Unknown, 58 Unchecked, 2.8s Time] [2022-11-20 11:26:35,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15223 states. [2022-11-20 11:26:36,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15223 to 15219. [2022-11-20 11:26:36,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15219 states, 15196 states have (on average 4.820742300605422) internal successors, (73256), 15218 states have internal predecessors, (73256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:36,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15219 states to 15219 states and 73256 transitions. [2022-11-20 11:26:36,322 INFO L78 Accepts]: Start accepts. Automaton has 15219 states and 73256 transitions. Word has length 15 [2022-11-20 11:26:36,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:26:36,322 INFO L495 AbstractCegarLoop]: Abstraction has 15219 states and 73256 transitions. [2022-11-20 11:26:36,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:36,323 INFO L276 IsEmpty]: Start isEmpty. Operand 15219 states and 73256 transitions. [2022-11-20 11:26:36,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:26:36,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:26:36,325 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:26:36,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Ended with exit code 0 [2022-11-20 11:26:36,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:26:36,526 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:26:36,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:26:36,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1869652754, now seen corresponding path program 3 times [2022-11-20 11:26:36,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:26:36,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2020910310] [2022-11-20 11:26:36,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:26:36,527 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 [2022-11-20 11:26:36,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:26:36,528 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:26:36,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-20 11:26:36,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:26:36,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:26:36,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:26:36,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:26:37,317 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:26:37,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:26:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:37,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:26:39,720 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:39,720 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:26:39,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2020910310] [2022-11-20 11:26:39,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2020910310] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:26:39,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:26:39,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:26:39,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139869232] [2022-11-20 11:26:39,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:26:39,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:26:39,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:26:39,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:26:39,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:26:39,722 INFO L87 Difference]: Start difference. First operand 15219 states and 73256 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:44,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:26:44,866 INFO L93 Difference]: Finished difference Result 17012 states and 79656 transitions. [2022-11-20 11:26:44,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:26:44,867 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 11:26:44,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:26:44,937 INFO L225 Difference]: With dead ends: 17012 [2022-11-20 11:26:44,937 INFO L226 Difference]: Without dead ends: 17012 [2022-11-20 11:26:44,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:26:44,938 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 44 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:26:44,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 7 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 539 Invalid, 0 Unknown, 98 Unchecked, 3.8s Time] [2022-11-20 11:26:44,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17012 states. [2022-11-20 11:26:45,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17012 to 15241. [2022-11-20 11:26:45,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15241 states, 15218 states have (on average 4.820672887370219) internal successors, (73361), 15240 states have internal predecessors, (73361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:45,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15241 states to 15241 states and 73361 transitions. [2022-11-20 11:26:45,490 INFO L78 Accepts]: Start accepts. Automaton has 15241 states and 73361 transitions. Word has length 15 [2022-11-20 11:26:45,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:26:45,490 INFO L495 AbstractCegarLoop]: Abstraction has 15241 states and 73361 transitions. [2022-11-20 11:26:45,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:45,490 INFO L276 IsEmpty]: Start isEmpty. Operand 15241 states and 73361 transitions. [2022-11-20 11:26:45,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:26:45,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:26:45,493 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:26:45,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-20 11:26:45,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:26:45,693 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:26:45,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:26:45,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1649854756, now seen corresponding path program 3 times [2022-11-20 11:26:45,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:26:45,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [955691496] [2022-11-20 11:26:45,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:26:45,694 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:26:45,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:26:45,696 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:26:45,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-20 11:26:46,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:26:46,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:26:46,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:26:46,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:26:46,350 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:26:46,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:26:46,729 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:46,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:26:48,680 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:48,681 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:26:48,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [955691496] [2022-11-20 11:26:48,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [955691496] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:26:48,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:26:48,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:26:48,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878336238] [2022-11-20 11:26:48,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:26:48,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:26:48,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:26:48,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:26:48,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:26:48,682 INFO L87 Difference]: Start difference. First operand 15241 states and 73361 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:53,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:26:53,815 INFO L93 Difference]: Finished difference Result 17045 states and 79840 transitions. [2022-11-20 11:26:53,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:26:53,816 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 11:26:53,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:26:53,894 INFO L225 Difference]: With dead ends: 17045 [2022-11-20 11:26:53,894 INFO L226 Difference]: Without dead ends: 17045 [2022-11-20 11:26:53,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:26:53,895 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 51 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:26:53,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 6 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 566 Invalid, 0 Unknown, 40 Unchecked, 3.9s Time] [2022-11-20 11:26:53,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17045 states. [2022-11-20 11:26:54,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17045 to 15275. [2022-11-20 11:26:54,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15275 states, 15252 states have (on average 4.821990558615264) internal successors, (73545), 15274 states have internal predecessors, (73545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:54,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15275 states to 15275 states and 73545 transitions. [2022-11-20 11:26:54,519 INFO L78 Accepts]: Start accepts. Automaton has 15275 states and 73545 transitions. Word has length 15 [2022-11-20 11:26:54,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:26:54,519 INFO L495 AbstractCegarLoop]: Abstraction has 15275 states and 73545 transitions. [2022-11-20 11:26:54,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:54,520 INFO L276 IsEmpty]: Start isEmpty. Operand 15275 states and 73545 transitions. [2022-11-20 11:26:54,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:26:54,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:26:54,523 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:26:54,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Ended with exit code 0 [2022-11-20 11:26:54,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:26:54,724 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:26:54,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:26:54,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1666478134, now seen corresponding path program 3 times [2022-11-20 11:26:54,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:26:54,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1777450826] [2022-11-20 11:26:54,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:26:54,725 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 [2022-11-20 11:26:54,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:26:54,726 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:26:54,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-20 11:26:55,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:26:55,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:26:55,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:26:55,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:26:55,399 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:26:55,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:26:55,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:55,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:26:57,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:57,852 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:26:57,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1777450826] [2022-11-20 11:26:57,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1777450826] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:26:57,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:26:57,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:26:57,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387712806] [2022-11-20 11:26:57,853 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:26:57,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:26:57,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:26:57,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:26:57,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:26:57,854 INFO L87 Difference]: Start difference. First operand 15275 states and 73545 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:27:03,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:27:03,083 INFO L93 Difference]: Finished difference Result 17067 states and 79986 transitions. [2022-11-20 11:27:03,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:27:03,084 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 11:27:03,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:27:03,165 INFO L225 Difference]: With dead ends: 17067 [2022-11-20 11:27:03,165 INFO L226 Difference]: Without dead ends: 17067 [2022-11-20 11:27:03,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:27:03,165 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 41 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:27:03,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 6 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 562 Invalid, 0 Unknown, 166 Unchecked, 4.0s Time] [2022-11-20 11:27:03,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17067 states. [2022-11-20 11:27:03,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17067 to 15251. [2022-11-20 11:27:03,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15251 states, 15228 states have (on average 4.8218413448909905) internal successors, (73427), 15250 states have internal predecessors, (73427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:27:03,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15251 states to 15251 states and 73427 transitions. [2022-11-20 11:27:03,731 INFO L78 Accepts]: Start accepts. Automaton has 15251 states and 73427 transitions. Word has length 15 [2022-11-20 11:27:03,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:27:03,731 INFO L495 AbstractCegarLoop]: Abstraction has 15251 states and 73427 transitions. [2022-11-20 11:27:03,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:27:03,732 INFO L276 IsEmpty]: Start isEmpty. Operand 15251 states and 73427 transitions. [2022-11-20 11:27:03,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:27:03,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:27:03,734 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:27:03,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-11-20 11:27:03,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:27:03,935 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:27:03,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:27:03,935 INFO L85 PathProgramCache]: Analyzing trace with hash 751647568, now seen corresponding path program 3 times [2022-11-20 11:27:03,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:27:03,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [368159820] [2022-11-20 11:27:03,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:27:03,936 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 [2022-11-20 11:27:03,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:27:03,937 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:27:03,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-20 11:27:04,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 11:27:04,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:27:04,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:27:04,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:27:04,599 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:27:04,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:27:04,702 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 15 treesize of output 11 [2022-11-20 11:27:04,954 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:27:04,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:27:05,416 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:27:05,416 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:27:05,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [368159820] [2022-11-20 11:27:05,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [368159820] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:27:05,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:27:05,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-20 11:27:05,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45334364] [2022-11-20 11:27:05,417 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:27:05,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:27:05,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:27:05,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:27:05,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:27:05,417 INFO L87 Difference]: Start difference. First operand 15251 states and 73427 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:27:10,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:27:10,137 INFO L93 Difference]: Finished difference Result 15161 states and 70590 transitions. [2022-11-20 11:27:10,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:27:10,138 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 11:27:10,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:27:10,211 INFO L225 Difference]: With dead ends: 15161 [2022-11-20 11:27:10,211 INFO L226 Difference]: Without dead ends: 15161 [2022-11-20 11:27:10,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:27:10,211 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 534 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:27:10,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 63 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1394 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-20 11:27:10,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15161 states. [2022-11-20 11:27:10,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15161 to 14479. [2022-11-20 11:27:10,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14479 states, 14456 states have (on average 4.729109020475927) internal successors, (68364), 14478 states have internal predecessors, (68364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:27:10,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14479 states to 14479 states and 68364 transitions. [2022-11-20 11:27:10,764 INFO L78 Accepts]: Start accepts. Automaton has 14479 states and 68364 transitions. Word has length 15 [2022-11-20 11:27:10,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:27:10,765 INFO L495 AbstractCegarLoop]: Abstraction has 14479 states and 68364 transitions. [2022-11-20 11:27:10,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:27:10,765 INFO L276 IsEmpty]: Start isEmpty. Operand 14479 states and 68364 transitions. [2022-11-20 11:27:10,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:27:10,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:27:10,768 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1] [2022-11-20 11:27:10,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-20 11:27:10,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:27:10,968 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:27:10,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:27:10,969 INFO L85 PathProgramCache]: Analyzing trace with hash -489542208, now seen corresponding path program 5 times [2022-11-20 11:27:10,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:27:10,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1066019437] [2022-11-20 11:27:10,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:27:10,969 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 [2022-11-20 11:27:10,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:27:10,970 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:27:10,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-20 11:27:11,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-20 11:27:11,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:27:11,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 11:27:11,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:27:11,596 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:27:11,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:27:12,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 10 [2022-11-20 11:27:12,116 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 7 treesize of output 5 [2022-11-20 11:27:12,127 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:27:12,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:27:12,662 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 8 treesize of output 6 [2022-11-20 11:27:12,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-20 11:27:12,700 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-20 11:27:15,407 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:15,407 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:27:15,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1066019437] [2022-11-20 11:27:15,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1066019437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:27:15,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:27:15,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 22 [2022-11-20 11:27:15,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193241822] [2022-11-20 11:27:15,408 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:27:15,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 11:27:15,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:27:15,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 11:27:15,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-11-20 11:27:15,409 INFO L87 Difference]: Start difference. First operand 14479 states and 68364 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:27:27,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:27:27,865 INFO L93 Difference]: Finished difference Result 19005 states and 89145 transitions. [2022-11-20 11:27:27,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 11:27:27,866 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 11:27:27,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:27:27,954 INFO L225 Difference]: With dead ends: 19005 [2022-11-20 11:27:27,954 INFO L226 Difference]: Without dead ends: 19005 [2022-11-20 11:27:27,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:27:27,954 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 323 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1495 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:27:27,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 74 Invalid, 1647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1495 Invalid, 0 Unknown, 140 Unchecked, 8.3s Time] [2022-11-20 11:27:27,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19005 states. [2022-11-20 11:27:28,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19005 to 14475. [2022-11-20 11:27:28,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14475 states, 14452 states have (on average 4.729449211181843) internal successors, (68350), 14474 states have internal predecessors, (68350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:27:28,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14475 states to 14475 states and 68350 transitions. [2022-11-20 11:27:28,402 INFO L78 Accepts]: Start accepts. Automaton has 14475 states and 68350 transitions. Word has length 15 [2022-11-20 11:27:28,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:27:28,402 INFO L495 AbstractCegarLoop]: Abstraction has 14475 states and 68350 transitions. [2022-11-20 11:27:28,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:27:28,403 INFO L276 IsEmpty]: Start isEmpty. Operand 14475 states and 68350 transitions. [2022-11-20 11:27:28,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:27:28,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:27:28,405 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:27:28,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2022-11-20 11:27:28,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:27:28,606 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:27:28,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:27:28,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1146399179, now seen corresponding path program 1 times [2022-11-20 11:27:28,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:27:28,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1240673168] [2022-11-20 11:27:28,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:27:28,607 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 [2022-11-20 11:27:28,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:27:28,608 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:27:28,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-20 11:27:28,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:28,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:27:28,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:27:29,105 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:27:29,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:27:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:29,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:27:30,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:30,934 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:27:30,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1240673168] [2022-11-20 11:27:30,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1240673168] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:27:30,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:27:30,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:27:30,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815457711] [2022-11-20 11:27:30,934 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:27:30,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:27:30,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:27:30,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:27:30,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:27:30,935 INFO L87 Difference]: Start difference. First operand 14475 states and 68350 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:27:33,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:27:33,404 INFO L93 Difference]: Finished difference Result 14490 states and 68419 transitions. [2022-11-20 11:27:33,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:27:33,406 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:27:33,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:27:33,470 INFO L225 Difference]: With dead ends: 14490 [2022-11-20 11:27:33,470 INFO L226 Difference]: Without dead ends: 14490 [2022-11-20 11:27:33,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:27:33,471 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:27:33,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 7 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 254 Invalid, 0 Unknown, 76 Unchecked, 1.4s Time] [2022-11-20 11:27:33,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14490 states. [2022-11-20 11:27:33,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14490 to 14487. [2022-11-20 11:27:33,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14487 states, 14464 states have (on average 4.729397123893805) internal successors, (68406), 14486 states have internal predecessors, (68406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:27:33,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14487 states to 14487 states and 68406 transitions. [2022-11-20 11:27:33,996 INFO L78 Accepts]: Start accepts. Automaton has 14487 states and 68406 transitions. Word has length 16 [2022-11-20 11:27:33,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:27:33,996 INFO L495 AbstractCegarLoop]: Abstraction has 14487 states and 68406 transitions. [2022-11-20 11:27:33,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:27:33,996 INFO L276 IsEmpty]: Start isEmpty. Operand 14487 states and 68406 transitions. [2022-11-20 11:27:33,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:27:33,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:27:34,000 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:27:34,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-11-20 11:27:34,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:27:34,200 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:27:34,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:27:34,201 INFO L85 PathProgramCache]: Analyzing trace with hash 839200889, now seen corresponding path program 1 times [2022-11-20 11:27:34,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:27:34,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071826064] [2022-11-20 11:27:34,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:27:34,201 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 [2022-11-20 11:27:34,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:27:34,202 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:27:34,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-20 11:27:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:34,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:27:34,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:27:34,750 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:27:34,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:27:35,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:35,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:27:36,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:36,776 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:27:36,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071826064] [2022-11-20 11:27:36,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071826064] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:27:36,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:27:36,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:27:36,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089786035] [2022-11-20 11:27:36,776 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:27:36,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:27:36,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:27:36,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:27:36,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:27:36,778 INFO L87 Difference]: Start difference. First operand 14487 states and 68406 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:27:39,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:27:39,521 INFO L93 Difference]: Finished difference Result 14504 states and 68483 transitions. [2022-11-20 11:27:39,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:27:39,523 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:27:39,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:27:39,587 INFO L225 Difference]: With dead ends: 14504 [2022-11-20 11:27:39,587 INFO L226 Difference]: Without dead ends: 14504 [2022-11-20 11:27:39,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:27:39,587 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:27:39,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 7 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 278 Invalid, 0 Unknown, 49 Unchecked, 1.8s Time] [2022-11-20 11:27:39,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14504 states. [2022-11-20 11:27:39,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14504 to 14499. [2022-11-20 11:27:39,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14499 states, 14476 states have (on average 4.729345122962144) internal successors, (68462), 14498 states have internal predecessors, (68462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:27:40,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14499 states to 14499 states and 68462 transitions. [2022-11-20 11:27:40,140 INFO L78 Accepts]: Start accepts. Automaton has 14499 states and 68462 transitions. Word has length 16 [2022-11-20 11:27:40,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:27:40,140 INFO L495 AbstractCegarLoop]: Abstraction has 14499 states and 68462 transitions. [2022-11-20 11:27:40,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:27:40,140 INFO L276 IsEmpty]: Start isEmpty. Operand 14499 states and 68462 transitions. [2022-11-20 11:27:40,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:27:40,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:27:40,144 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:27:40,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-11-20 11:27:40,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:27:40,348 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:27:40,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:27:40,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1138080611, now seen corresponding path program 1 times [2022-11-20 11:27:40,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:27:40,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771792824] [2022-11-20 11:27:40,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:27:40,350 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 [2022-11-20 11:27:40,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:27:40,351 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:27:40,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-20 11:27:40,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:40,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:27:40,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:27:40,897 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:27:40,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:27:41,294 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:41,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:27:42,740 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:42,740 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:27:42,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771792824] [2022-11-20 11:27:42,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [771792824] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:27:42,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:27:42,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:27:42,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774047971] [2022-11-20 11:27:42,741 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:27:42,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:27:42,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:27:42,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:27:42,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:27:42,742 INFO L87 Difference]: Start difference. First operand 14499 states and 68462 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:27:44,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:27:44,343 INFO L93 Difference]: Finished difference Result 14515 states and 68535 transitions. [2022-11-20 11:27:44,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:27:44,344 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:27:44,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:27:44,395 INFO L225 Difference]: With dead ends: 14515 [2022-11-20 11:27:44,395 INFO L226 Difference]: Without dead ends: 14515 [2022-11-20 11:27:44,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:27:44,396 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 8 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:27:44,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 6 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 122 Invalid, 0 Unknown, 48 Unchecked, 0.6s Time] [2022-11-20 11:27:44,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14515 states. [2022-11-20 11:27:44,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14515 to 14511. [2022-11-20 11:27:44,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14511 states, 14488 states have (on average 4.7292932081722805) internal successors, (68518), 14510 states have internal predecessors, (68518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:27:44,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14511 states to 14511 states and 68518 transitions. [2022-11-20 11:27:44,902 INFO L78 Accepts]: Start accepts. Automaton has 14511 states and 68518 transitions. Word has length 16 [2022-11-20 11:27:44,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:27:44,902 INFO L495 AbstractCegarLoop]: Abstraction has 14511 states and 68518 transitions. [2022-11-20 11:27:44,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:27:44,902 INFO L276 IsEmpty]: Start isEmpty. Operand 14511 states and 68518 transitions. [2022-11-20 11:27:44,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:27:44,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:27:44,907 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:27:44,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-20 11:27:45,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:27:45,120 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:27:45,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:27:45,121 INFO L85 PathProgramCache]: Analyzing trace with hash -625134477, now seen corresponding path program 2 times [2022-11-20 11:27:45,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:27:45,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383741830] [2022-11-20 11:27:45,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:27:45,121 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 [2022-11-20 11:27:45,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:27:45,122 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:27:45,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-20 11:27:45,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:27:45,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:27:45,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:27:45,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:27:45,648 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:27:45,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:27:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:46,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:27:47,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:47,511 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:27:47,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383741830] [2022-11-20 11:27:47,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383741830] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:27:47,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:27:47,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:27:47,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386306181] [2022-11-20 11:27:47,511 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:27:47,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:27:47,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:27:47,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:27:47,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:27:47,512 INFO L87 Difference]: Start difference. First operand 14511 states and 68518 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:27:50,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:27:50,464 INFO L93 Difference]: Finished difference Result 14544 states and 68680 transitions. [2022-11-20 11:27:50,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:27:50,465 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:27:50,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:27:50,699 INFO L225 Difference]: With dead ends: 14544 [2022-11-20 11:27:50,700 INFO L226 Difference]: Without dead ends: 14544 [2022-11-20 11:27:50,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:27:50,700 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 12 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:27:50,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 6 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 332 Invalid, 0 Unknown, 21 Unchecked, 2.1s Time] [2022-11-20 11:27:50,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14544 states. [2022-11-20 11:27:50,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14544 to 14528. [2022-11-20 11:27:50,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14528 states, 14505 states have (on average 4.729334712168217) internal successors, (68599), 14527 states have internal predecessors, (68599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:27:51,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14528 states to 14528 states and 68599 transitions. [2022-11-20 11:27:51,048 INFO L78 Accepts]: Start accepts. Automaton has 14528 states and 68599 transitions. Word has length 16 [2022-11-20 11:27:51,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:27:51,049 INFO L495 AbstractCegarLoop]: Abstraction has 14528 states and 68599 transitions. [2022-11-20 11:27:51,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:27:51,049 INFO L276 IsEmpty]: Start isEmpty. Operand 14528 states and 68599 transitions. [2022-11-20 11:27:51,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:27:51,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:27:51,053 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:27:51,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Ended with exit code 0 [2022-11-20 11:27:51,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:27:51,253 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:27:51,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:27:51,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1722455905, now seen corresponding path program 2 times [2022-11-20 11:27:51,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:27:51,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [41295244] [2022-11-20 11:27:51,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:27:51,254 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:27:51,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:27:51,255 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:27:51,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-20 11:27:51,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:27:51,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:27:51,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:27:51,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:27:51,940 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:27:51,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:27:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:52,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:27:53,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:53,795 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:27:53,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [41295244] [2022-11-20 11:27:53,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [41295244] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:27:53,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:27:53,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:27:53,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494050752] [2022-11-20 11:27:53,796 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:27:53,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:27:53,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:27:53,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:27:53,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:27:53,797 INFO L87 Difference]: Start difference. First operand 14528 states and 68599 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:27:56,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:27:56,373 INFO L93 Difference]: Finished difference Result 14600 states and 68931 transitions. [2022-11-20 11:27:56,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:27:56,374 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:27:56,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:27:56,432 INFO L225 Difference]: With dead ends: 14600 [2022-11-20 11:27:56,432 INFO L226 Difference]: Without dead ends: 14600 [2022-11-20 11:27:56,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:27:56,433 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 32 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:27:56,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 6 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 331 Invalid, 0 Unknown, 75 Unchecked, 1.8s Time] [2022-11-20 11:27:56,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14600 states. [2022-11-20 11:27:56,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14600 to 14572. [2022-11-20 11:27:56,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14572 states, 14549 states have (on average 4.728984809952574) internal successors, (68802), 14571 states have internal predecessors, (68802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:27:56,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14572 states to 14572 states and 68802 transitions. [2022-11-20 11:27:56,869 INFO L78 Accepts]: Start accepts. Automaton has 14572 states and 68802 transitions. Word has length 16 [2022-11-20 11:27:56,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:27:56,869 INFO L495 AbstractCegarLoop]: Abstraction has 14572 states and 68802 transitions. [2022-11-20 11:27:56,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:27:56,869 INFO L276 IsEmpty]: Start isEmpty. Operand 14572 states and 68802 transitions. [2022-11-20 11:27:56,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:27:56,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:27:56,872 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:27:56,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-11-20 11:27:57,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:27:57,073 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:27:57,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:27:57,073 INFO L85 PathProgramCache]: Analyzing trace with hash -280990019, now seen corresponding path program 2 times [2022-11-20 11:27:57,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:27:57,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [560878713] [2022-11-20 11:27:57,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:27:57,074 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 [2022-11-20 11:27:57,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:27:57,074 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:27:57,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-20 11:27:57,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:27:57,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:27:57,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:27:57,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:27:57,717 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:27:57,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:27:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:58,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:27:59,613 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:59,613 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:27:59,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [560878713] [2022-11-20 11:27:59,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [560878713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:27:59,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:27:59,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:27:59,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502332030] [2022-11-20 11:27:59,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:27:59,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:27:59,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:27:59,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:27:59,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:27:59,615 INFO L87 Difference]: Start difference. First operand 14572 states and 68802 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:28:02,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:28:02,826 INFO L93 Difference]: Finished difference Result 14646 states and 69159 transitions. [2022-11-20 11:28:02,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:28:02,827 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:28:02,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:28:02,878 INFO L225 Difference]: With dead ends: 14646 [2022-11-20 11:28:02,878 INFO L226 Difference]: Without dead ends: 14646 [2022-11-20 11:28:02,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:28:02,879 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 23 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:28:02,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 3 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 264 Invalid, 0 Unknown, 55 Unchecked, 1.5s Time] [2022-11-20 11:28:02,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14646 states. [2022-11-20 11:28:03,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14646 to 14609. [2022-11-20 11:28:03,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14609 states, 14586 states have (on average 4.7295351707116415) internal successors, (68985), 14608 states have internal predecessors, (68985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:28:03,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14609 states to 14609 states and 68985 transitions. [2022-11-20 11:28:03,299 INFO L78 Accepts]: Start accepts. Automaton has 14609 states and 68985 transitions. Word has length 16 [2022-11-20 11:28:03,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:28:03,299 INFO L495 AbstractCegarLoop]: Abstraction has 14609 states and 68985 transitions. [2022-11-20 11:28:03,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:28:03,299 INFO L276 IsEmpty]: Start isEmpty. Operand 14609 states and 68985 transitions. [2022-11-20 11:28:03,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:28:03,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:28:03,302 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:28:03,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-11-20 11:28:03,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:28:03,503 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:28:03,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:28:03,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1009497693, now seen corresponding path program 3 times [2022-11-20 11:28:03,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:28:03,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [171591712] [2022-11-20 11:28:03,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:28:03,504 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 [2022-11-20 11:28:03,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:28:03,505 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:28:03,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-20 11:28:03,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:28:03,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:28:03,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:28:03,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:28:04,099 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:28:04,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:28:04,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:28:04,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:28:06,236 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:28:06,237 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:28:06,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [171591712] [2022-11-20 11:28:06,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [171591712] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:28:06,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:28:06,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:28:06,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436815799] [2022-11-20 11:28:06,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:28:06,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:28:06,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:28:06,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:28:06,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:28:06,238 INFO L87 Difference]: Start difference. First operand 14609 states and 68985 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:28:10,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:28:10,492 INFO L93 Difference]: Finished difference Result 16317 states and 74961 transitions. [2022-11-20 11:28:10,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:28:10,493 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:28:10,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:28:10,568 INFO L225 Difference]: With dead ends: 16317 [2022-11-20 11:28:10,568 INFO L226 Difference]: Without dead ends: 16317 [2022-11-20 11:28:10,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:28:10,569 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 43 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:28:10,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 5 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 464 Invalid, 0 Unknown, 87 Unchecked, 3.2s Time] [2022-11-20 11:28:10,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16317 states. [2022-11-20 11:28:11,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16317 to 14602. [2022-11-20 11:28:11,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14602 states, 14579 states have (on average 4.729405309006105) internal successors, (68950), 14601 states have internal predecessors, (68950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:28:11,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14602 states to 14602 states and 68950 transitions. [2022-11-20 11:28:11,090 INFO L78 Accepts]: Start accepts. Automaton has 14602 states and 68950 transitions. Word has length 16 [2022-11-20 11:28:11,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:28:11,091 INFO L495 AbstractCegarLoop]: Abstraction has 14602 states and 68950 transitions. [2022-11-20 11:28:11,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:28:11,091 INFO L276 IsEmpty]: Start isEmpty. Operand 14602 states and 68950 transitions. [2022-11-20 11:28:11,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:28:11,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:28:11,095 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:28:11,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-20 11:28:11,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:28:11,296 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:28:11,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:28:11,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1085226415, now seen corresponding path program 3 times [2022-11-20 11:28:11,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:28:11,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1670512285] [2022-11-20 11:28:11,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:28:11,297 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 [2022-11-20 11:28:11,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:28:11,298 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:28:11,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-20 11:28:11,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:28:11,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:28:11,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:28:11,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:28:11,988 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:28:11,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:28:12,420 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:28:12,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:28:14,511 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:28:14,511 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:28:14,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1670512285] [2022-11-20 11:28:14,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1670512285] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:28:14,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:28:14,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:28:14,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789011476] [2022-11-20 11:28:14,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:28:14,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:28:14,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:28:14,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:28:14,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:28:14,513 INFO L87 Difference]: Start difference. First operand 14602 states and 68950 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:28:20,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:28:20,494 INFO L93 Difference]: Finished difference Result 16346 states and 75092 transitions. [2022-11-20 11:28:20,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 11:28:20,496 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:28:20,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:28:20,611 INFO L225 Difference]: With dead ends: 16346 [2022-11-20 11:28:20,612 INFO L226 Difference]: Without dead ends: 16346 [2022-11-20 11:28:20,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:28:20,612 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 31 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:28:20,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 6 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 505 Invalid, 0 Unknown, 81 Unchecked, 4.0s Time] [2022-11-20 11:28:20,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16346 states. [2022-11-20 11:28:21,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16346 to 14638. [2022-11-20 11:28:21,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14638 states, 14615 states have (on average 4.729934998289429) internal successors, (69128), 14637 states have internal predecessors, (69128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:28:21,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14638 states to 14638 states and 69128 transitions. [2022-11-20 11:28:21,167 INFO L78 Accepts]: Start accepts. Automaton has 14638 states and 69128 transitions. Word has length 16 [2022-11-20 11:28:21,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:28:21,167 INFO L495 AbstractCegarLoop]: Abstraction has 14638 states and 69128 transitions. [2022-11-20 11:28:21,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:28:21,167 INFO L276 IsEmpty]: Start isEmpty. Operand 14638 states and 69128 transitions. [2022-11-20 11:28:21,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:28:21,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:28:21,171 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:28:21,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-11-20 11:28:21,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:28:21,371 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:28:21,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:28:21,372 INFO L85 PathProgramCache]: Analyzing trace with hash 882051795, now seen corresponding path program 3 times [2022-11-20 11:28:21,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:28:21,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763513071] [2022-11-20 11:28:21,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:28:21,372 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 [2022-11-20 11:28:21,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:28:21,373 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:28:21,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-20 11:28:21,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:28:21,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:28:21,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:28:21,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:28:22,080 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:28:22,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:28:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:28:22,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:28:24,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:28:24,720 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:28:24,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763513071] [2022-11-20 11:28:24,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763513071] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:28:24,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:28:24,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:28:24,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649746426] [2022-11-20 11:28:24,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:28:24,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:28:24,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:28:24,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:28:24,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:28:24,721 INFO L87 Difference]: Start difference. First operand 14638 states and 69128 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:28:29,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:28:29,064 INFO L93 Difference]: Finished difference Result 16421 states and 75471 transitions. [2022-11-20 11:28:29,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:28:29,065 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:28:29,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:28:29,129 INFO L225 Difference]: With dead ends: 16421 [2022-11-20 11:28:29,129 INFO L226 Difference]: Without dead ends: 16421 [2022-11-20 11:28:29,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:28:29,129 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 35 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:28:29,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 6 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 468 Invalid, 0 Unknown, 158 Unchecked, 3.2s Time] [2022-11-20 11:28:29,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16421 states. [2022-11-20 11:28:29,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16421 to 14677. [2022-11-20 11:28:29,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14677 states, 14654 states have (on average 4.730858468677495) internal successors, (69326), 14676 states have internal predecessors, (69326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:28:29,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14677 states to 14677 states and 69326 transitions. [2022-11-20 11:28:29,591 INFO L78 Accepts]: Start accepts. Automaton has 14677 states and 69326 transitions. Word has length 16 [2022-11-20 11:28:29,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:28:29,591 INFO L495 AbstractCegarLoop]: Abstraction has 14677 states and 69326 transitions. [2022-11-20 11:28:29,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:28:29,591 INFO L276 IsEmpty]: Start isEmpty. Operand 14677 states and 69326 transitions. [2022-11-20 11:28:29,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:28:29,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:28:29,596 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:28:29,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2022-11-20 11:28:29,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:28:29,796 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:28:29,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:28:29,797 INFO L85 PathProgramCache]: Analyzing trace with hash 885741971, now seen corresponding path program 1 times [2022-11-20 11:28:29,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:28:29,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381651524] [2022-11-20 11:28:29,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:28:29,797 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 [2022-11-20 11:28:29,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:28:29,798 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:28:29,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-20 11:28:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:30,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:28:30,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:28:30,332 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:28:30,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:28:30,728 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:28:30,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:28:32,184 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:28:32,184 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:28:32,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381651524] [2022-11-20 11:28:32,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381651524] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:28:32,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:28:32,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:28:32,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682307003] [2022-11-20 11:28:32,184 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:28:32,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:28:32,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:28:32,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:28:32,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:28:32,185 INFO L87 Difference]: Start difference. First operand 14677 states and 69326 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:28:33,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:28:33,773 INFO L93 Difference]: Finished difference Result 14692 states and 69395 transitions. [2022-11-20 11:28:33,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:28:33,774 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:28:33,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:28:33,841 INFO L225 Difference]: With dead ends: 14692 [2022-11-20 11:28:33,841 INFO L226 Difference]: Without dead ends: 14692 [2022-11-20 11:28:33,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:28:33,841 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 8 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:28:33,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 7 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 146 Invalid, 0 Unknown, 47 Unchecked, 0.7s Time] [2022-11-20 11:28:33,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14692 states. [2022-11-20 11:28:34,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14692 to 14689. [2022-11-20 11:28:34,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14689 states, 14666 states have (on average 4.730805945724805) internal successors, (69382), 14688 states have internal predecessors, (69382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:28:34,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14689 states to 14689 states and 69382 transitions. [2022-11-20 11:28:34,469 INFO L78 Accepts]: Start accepts. Automaton has 14689 states and 69382 transitions. Word has length 16 [2022-11-20 11:28:34,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:28:34,469 INFO L495 AbstractCegarLoop]: Abstraction has 14689 states and 69382 transitions. [2022-11-20 11:28:34,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:28:34,470 INFO L276 IsEmpty]: Start isEmpty. Operand 14689 states and 69382 transitions. [2022-11-20 11:28:34,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:28:34,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:28:34,473 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:28:34,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2022-11-20 11:28:34,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:28:34,675 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:28:34,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:28:34,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1227507845, now seen corresponding path program 4 times [2022-11-20 11:28:34,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:28:34,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35932500] [2022-11-20 11:28:34,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:28:34,676 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 [2022-11-20 11:28:34,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:28:34,677 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:28:34,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-20 11:28:34,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:28:34,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:28:34,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:28:34,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:28:35,206 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:28:35,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:28:35,585 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:28:35,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:28:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:28:37,051 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:28:37,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35932500] [2022-11-20 11:28:37,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35932500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:28:37,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:28:37,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:28:37,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490303921] [2022-11-20 11:28:37,052 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:28:37,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:28:37,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:28:37,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:28:37,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:28:37,053 INFO L87 Difference]: Start difference. First operand 14689 states and 69382 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:28:40,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:28:40,795 INFO L93 Difference]: Finished difference Result 14884 states and 70349 transitions. [2022-11-20 11:28:40,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:28:40,796 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:28:40,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:28:40,857 INFO L225 Difference]: With dead ends: 14884 [2022-11-20 11:28:40,857 INFO L226 Difference]: Without dead ends: 14884 [2022-11-20 11:28:40,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:28:40,858 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 48 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:28:40,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 7 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 485 Invalid, 0 Unknown, 148 Unchecked, 2.9s Time] [2022-11-20 11:28:40,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14884 states. [2022-11-20 11:28:41,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14884 to 14792. [2022-11-20 11:28:41,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14792 states, 14769 states have (on average 4.732073938655292) internal successors, (69888), 14791 states have internal predecessors, (69888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:28:41,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14792 states to 14792 states and 69888 transitions. [2022-11-20 11:28:41,355 INFO L78 Accepts]: Start accepts. Automaton has 14792 states and 69888 transitions. Word has length 16 [2022-11-20 11:28:41,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:28:41,356 INFO L495 AbstractCegarLoop]: Abstraction has 14792 states and 69888 transitions. [2022-11-20 11:28:41,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:28:41,356 INFO L276 IsEmpty]: Start isEmpty. Operand 14792 states and 69888 transitions. [2022-11-20 11:28:41,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:28:41,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:28:41,361 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:28:41,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-11-20 11:28:41,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:28:41,561 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:28:41,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:28:41,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1742832563, now seen corresponding path program 2 times [2022-11-20 11:28:41,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:28:41,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142725167] [2022-11-20 11:28:41,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:28:41,562 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 [2022-11-20 11:28:41,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:28:41,564 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:28:41,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-20 11:28:41,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:28:41,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:28:41,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:28:41,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:28:42,154 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:28:42,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:28:42,577 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:28:42,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:28:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:28:44,081 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:28:44,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142725167] [2022-11-20 11:28:44,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142725167] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:28:44,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:28:44,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:28:44,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073789623] [2022-11-20 11:28:44,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:28:44,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:28:44,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:28:44,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:28:44,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:28:44,082 INFO L87 Difference]: Start difference. First operand 14792 states and 69888 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:28:46,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:28:46,830 INFO L93 Difference]: Finished difference Result 14848 states and 70166 transitions. [2022-11-20 11:28:46,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:28:46,831 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:28:46,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:28:46,887 INFO L225 Difference]: With dead ends: 14848 [2022-11-20 11:28:46,887 INFO L226 Difference]: Without dead ends: 14848 [2022-11-20 11:28:46,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:28:46,887 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 13 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:28:46,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 6 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 334 Invalid, 0 Unknown, 18 Unchecked, 1.8s Time] [2022-11-20 11:28:46,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14848 states. [2022-11-20 11:28:47,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14848 to 14822. [2022-11-20 11:28:47,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14822 states, 14799 states have (on average 4.732684640854112) internal successors, (70039), 14821 states have internal predecessors, (70039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:28:47,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14822 states to 14822 states and 70039 transitions. [2022-11-20 11:28:47,402 INFO L78 Accepts]: Start accepts. Automaton has 14822 states and 70039 transitions. Word has length 16 [2022-11-20 11:28:47,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:28:47,403 INFO L495 AbstractCegarLoop]: Abstraction has 14822 states and 70039 transitions. [2022-11-20 11:28:47,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:28:47,403 INFO L276 IsEmpty]: Start isEmpty. Operand 14822 states and 70039 transitions. [2022-11-20 11:28:47,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:28:47,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:28:47,406 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:28:47,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Forceful destruction successful, exit code 0 [2022-11-20 11:28:47,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:28:47,608 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:28:47,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:28:47,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1405716297, now seen corresponding path program 5 times [2022-11-20 11:28:47,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:28:47,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602617640] [2022-11-20 11:28:47,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:28:47,610 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 [2022-11-20 11:28:47,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:28:47,611 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:28:47,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-20 11:28:47,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 11:28:47,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:28:47,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:28:47,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:28:48,209 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:28:48,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:28:48,610 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:28:48,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:28:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:28:50,091 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:28:50,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602617640] [2022-11-20 11:28:50,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602617640] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:28:50,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:28:50,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:28:50,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21533721] [2022-11-20 11:28:50,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:28:50,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:28:50,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:28:50,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:28:50,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:28:50,093 INFO L87 Difference]: Start difference. First operand 14822 states and 70039 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:28:52,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:28:52,962 INFO L93 Difference]: Finished difference Result 14868 states and 70272 transitions. [2022-11-20 11:28:52,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:28:52,963 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:28:52,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:28:53,030 INFO L225 Difference]: With dead ends: 14868 [2022-11-20 11:28:53,030 INFO L226 Difference]: Without dead ends: 14868 [2022-11-20 11:28:53,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-11-20 11:28:53,031 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:28:53,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 4 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 183 Invalid, 0 Unknown, 137 Unchecked, 1.0s Time] [2022-11-20 11:28:53,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14868 states. [2022-11-20 11:28:53,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14868 to 14826. [2022-11-20 11:28:53,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14826 states, 14803 states have (on average 4.732486658109843) internal successors, (70055), 14825 states have internal predecessors, (70055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:28:53,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14826 states to 14826 states and 70055 transitions. [2022-11-20 11:28:53,591 INFO L78 Accepts]: Start accepts. Automaton has 14826 states and 70055 transitions. Word has length 16 [2022-11-20 11:28:53,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:28:53,592 INFO L495 AbstractCegarLoop]: Abstraction has 14826 states and 70055 transitions. [2022-11-20 11:28:53,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:28:53,592 INFO L276 IsEmpty]: Start isEmpty. Operand 14826 states and 70055 transitions. [2022-11-20 11:28:53,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:28:53,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:28:53,596 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:28:53,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Forceful destruction successful, exit code 0 [2022-11-20 11:28:53,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:28:53,797 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:28:53,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:28:53,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1389092919, now seen corresponding path program 3 times [2022-11-20 11:28:53,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:28:53,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1507888538] [2022-11-20 11:28:53,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:28:53,798 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 [2022-11-20 11:28:53,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:28:53,799 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:28:53,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-20 11:28:54,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:28:54,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:28:54,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:28:54,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:28:54,449 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:28:54,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:28:54,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:28:54,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:28:56,478 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:28:56,479 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:28:56,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1507888538] [2022-11-20 11:28:56,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1507888538] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:28:56,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:28:56,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:28:56,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444391812] [2022-11-20 11:28:56,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:28:56,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:28:56,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:28:56,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:28:56,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:28:56,480 INFO L87 Difference]: Start difference. First operand 14826 states and 70055 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:29:01,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:29:01,944 INFO L93 Difference]: Finished difference Result 16610 states and 76412 transitions. [2022-11-20 11:29:01,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 11:29:01,946 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:29:01,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:29:02,010 INFO L225 Difference]: With dead ends: 16610 [2022-11-20 11:29:02,010 INFO L226 Difference]: Without dead ends: 16610 [2022-11-20 11:29:02,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:29:02,011 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 35 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:29:02,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 4 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 520 Invalid, 0 Unknown, 25 Unchecked, 3.7s Time] [2022-11-20 11:29:02,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16610 states. [2022-11-20 11:29:02,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16610 to 14871. [2022-11-20 11:29:02,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14871 states, 14848 states have (on average 4.733566810344827) internal successors, (70284), 14870 states have internal predecessors, (70284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:29:02,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14871 states to 14871 states and 70284 transitions. [2022-11-20 11:29:02,476 INFO L78 Accepts]: Start accepts. Automaton has 14871 states and 70284 transitions. Word has length 16 [2022-11-20 11:29:02,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:29:02,476 INFO L495 AbstractCegarLoop]: Abstraction has 14871 states and 70284 transitions. [2022-11-20 11:29:02,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:29:02,476 INFO L276 IsEmpty]: Start isEmpty. Operand 14871 states and 70284 transitions. [2022-11-20 11:29:02,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:29:02,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:29:02,479 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:29:02,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2022-11-20 11:29:02,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:29:02,680 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:29:02,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:29:02,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1353999121, now seen corresponding path program 1 times [2022-11-20 11:29:02,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:29:02,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1427179746] [2022-11-20 11:29:02,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:29:02,681 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 [2022-11-20 11:29:02,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:29:02,683 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:29:02,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-20 11:29:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:03,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:29:03,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:29:03,229 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:29:03,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:29:03,607 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:29:03,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:29:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:29:05,123 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:29:05,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1427179746] [2022-11-20 11:29:05,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1427179746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:29:05,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:29:05,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:29:05,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622959494] [2022-11-20 11:29:05,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:29:05,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:29:05,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:29:05,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:29:05,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:29:05,125 INFO L87 Difference]: Start difference. First operand 14871 states and 70284 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:29:07,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:29:07,720 INFO L93 Difference]: Finished difference Result 14932 states and 70581 transitions. [2022-11-20 11:29:07,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:29:07,721 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:29:07,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:29:07,770 INFO L225 Difference]: With dead ends: 14932 [2022-11-20 11:29:07,770 INFO L226 Difference]: Without dead ends: 14932 [2022-11-20 11:29:07,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:29:07,771 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 9 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:29:07,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 4 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 324 Invalid, 0 Unknown, 17 Unchecked, 1.8s Time] [2022-11-20 11:29:07,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14932 states. [2022-11-20 11:29:07,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14932 to 14902. [2022-11-20 11:29:08,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14902 states, 14879 states have (on average 4.734256334431078) internal successors, (70441), 14901 states have internal predecessors, (70441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:29:08,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14902 states to 14902 states and 70441 transitions. [2022-11-20 11:29:08,267 INFO L78 Accepts]: Start accepts. Automaton has 14902 states and 70441 transitions. Word has length 16 [2022-11-20 11:29:08,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:29:08,267 INFO L495 AbstractCegarLoop]: Abstraction has 14902 states and 70441 transitions. [2022-11-20 11:29:08,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:29:08,267 INFO L276 IsEmpty]: Start isEmpty. Operand 14902 states and 70441 transitions. [2022-11-20 11:29:08,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:29:08,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:29:08,270 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:29:08,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2022-11-20 11:29:08,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:29:08,471 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:29:08,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:29:08,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1464226995, now seen corresponding path program 2 times [2022-11-20 11:29:08,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:29:08,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851787381] [2022-11-20 11:29:08,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:29:08,472 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 [2022-11-20 11:29:08,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:29:08,473 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:29:08,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-20 11:29:08,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:29:08,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:29:08,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:29:08,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:29:09,059 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:29:09,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:29:09,455 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:29:09,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:29:10,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:29:10,968 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:29:10,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851787381] [2022-11-20 11:29:10,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851787381] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:29:10,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:29:10,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:29:10,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840499392] [2022-11-20 11:29:10,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:29:10,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:29:10,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:29:10,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:29:10,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:29:10,970 INFO L87 Difference]: Start difference. First operand 14902 states and 70441 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:29:12,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:29:12,667 INFO L93 Difference]: Finished difference Result 14926 states and 70559 transitions. [2022-11-20 11:29:12,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:29:12,668 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:29:12,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:29:12,732 INFO L225 Difference]: With dead ends: 14926 [2022-11-20 11:29:12,732 INFO L226 Difference]: Without dead ends: 14926 [2022-11-20 11:29:12,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:29:12,732 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 12 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:29:12,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 6 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 130 Invalid, 0 Unknown, 166 Unchecked, 0.6s Time] [2022-11-20 11:29:12,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14926 states. [2022-11-20 11:29:12,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14926 to 14906. [2022-11-20 11:29:13,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14906 states, 14883 states have (on average 4.7344621380098095) internal successors, (70463), 14905 states have internal predecessors, (70463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:29:13,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14906 states to 14906 states and 70463 transitions. [2022-11-20 11:29:13,278 INFO L78 Accepts]: Start accepts. Automaton has 14906 states and 70463 transitions. Word has length 16 [2022-11-20 11:29:13,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:29:13,279 INFO L495 AbstractCegarLoop]: Abstraction has 14906 states and 70463 transitions. [2022-11-20 11:29:13,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:29:13,279 INFO L276 IsEmpty]: Start isEmpty. Operand 14906 states and 70463 transitions. [2022-11-20 11:29:13,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:29:13,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:29:13,284 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:29:13,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Forceful destruction successful, exit code 0 [2022-11-20 11:29:13,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:29:13,508 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:29:13,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:29:13,508 INFO L85 PathProgramCache]: Analyzing trace with hash 251143481, now seen corresponding path program 3 times [2022-11-20 11:29:13,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:29:13,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497510509] [2022-11-20 11:29:13,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:29:13,508 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 [2022-11-20 11:29:13,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:29:13,509 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:29:13,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-20 11:29:13,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:29:13,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:29:13,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:29:13,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:29:14,215 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:29:14,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:29:14,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:29:14,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:29:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:29:16,418 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:29:16,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497510509] [2022-11-20 11:29:16,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497510509] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:29:16,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:29:16,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:29:16,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338389502] [2022-11-20 11:29:16,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:29:16,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:29:16,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:29:16,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:29:16,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:29:16,419 INFO L87 Difference]: Start difference. First operand 14906 states and 70463 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:29:19,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:29:19,889 INFO L93 Difference]: Finished difference Result 16568 states and 76206 transitions. [2022-11-20 11:29:19,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:29:19,890 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:29:19,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:29:19,954 INFO L225 Difference]: With dead ends: 16568 [2022-11-20 11:29:19,955 INFO L226 Difference]: Without dead ends: 16568 [2022-11-20 11:29:19,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:29:19,955 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 22 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:29:19,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 6 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 364 Invalid, 0 Unknown, 61 Unchecked, 2.3s Time] [2022-11-20 11:29:19,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16568 states. [2022-11-20 11:29:20,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16568 to 14916. [2022-11-20 11:29:20,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14916 states, 14893 states have (on average 4.7351776002148664) internal successors, (70521), 14915 states have internal predecessors, (70521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:29:20,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14916 states to 14916 states and 70521 transitions. [2022-11-20 11:29:20,496 INFO L78 Accepts]: Start accepts. Automaton has 14916 states and 70521 transitions. Word has length 16 [2022-11-20 11:29:20,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:29:20,496 INFO L495 AbstractCegarLoop]: Abstraction has 14916 states and 70521 transitions. [2022-11-20 11:29:20,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:29:20,496 INFO L276 IsEmpty]: Start isEmpty. Operand 14916 states and 70521 transitions. [2022-11-20 11:29:20,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:29:20,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:29:20,500 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:29:20,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2022-11-20 11:29:20,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:29:20,700 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:29:20,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:29:20,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1048477624, now seen corresponding path program 1 times [2022-11-20 11:29:20,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:29:20,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247301945] [2022-11-20 11:29:20,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:29:20,701 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 [2022-11-20 11:29:20,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:29:20,702 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:29:20,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-20 11:29:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:21,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:29:21,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:29:21,243 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:29:21,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:29:21,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:29:21,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:29:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:29:23,197 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:29:23,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247301945] [2022-11-20 11:29:23,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [247301945] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:29:23,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:29:23,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:29:23,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565790789] [2022-11-20 11:29:23,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:29:23,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:29:23,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:29:23,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:29:23,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:29:23,198 INFO L87 Difference]: Start difference. First operand 14916 states and 70521 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:29:25,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:29:25,825 INFO L93 Difference]: Finished difference Result 14931 states and 70590 transitions. [2022-11-20 11:29:25,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:29:25,826 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:29:25,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:29:25,886 INFO L225 Difference]: With dead ends: 14931 [2022-11-20 11:29:25,887 INFO L226 Difference]: Without dead ends: 14931 [2022-11-20 11:29:25,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:29:25,887 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 8 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:29:25,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 4 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 254 Invalid, 0 Unknown, 19 Unchecked, 1.6s Time] [2022-11-20 11:29:25,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14931 states. [2022-11-20 11:29:26,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14931 to 14928. [2022-11-20 11:29:26,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14928 states, 14905 states have (on average 4.7351224421335125) internal successors, (70577), 14927 states have internal predecessors, (70577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:29:26,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14928 states to 14928 states and 70577 transitions. [2022-11-20 11:29:26,424 INFO L78 Accepts]: Start accepts. Automaton has 14928 states and 70577 transitions. Word has length 16 [2022-11-20 11:29:26,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:29:26,425 INFO L495 AbstractCegarLoop]: Abstraction has 14928 states and 70577 transitions. [2022-11-20 11:29:26,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:29:26,425 INFO L276 IsEmpty]: Start isEmpty. Operand 14928 states and 70577 transitions. [2022-11-20 11:29:26,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:29:26,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:29:26,430 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:29:26,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Forceful destruction successful, exit code 0 [2022-11-20 11:29:26,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:29:26,643 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:29:26,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:29:26,644 INFO L85 PathProgramCache]: Analyzing trace with hash 203874598, now seen corresponding path program 2 times [2022-11-20 11:29:26,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:29:26,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [764322656] [2022-11-20 11:29:26,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:29:26,644 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 [2022-11-20 11:29:26,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:29:26,646 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:29:26,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-20 11:29:26,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:29:26,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:29:26,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:29:26,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:29:27,230 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:29:27,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:29:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:29:27,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:29:29,057 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:29:29,057 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:29:29,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [764322656] [2022-11-20 11:29:29,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [764322656] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:29:29,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:29:29,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:29:29,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037750031] [2022-11-20 11:29:29,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:29:29,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:29:29,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:29:29,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:29:29,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:29:29,059 INFO L87 Difference]: Start difference. First operand 14928 states and 70577 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:29:32,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:29:32,109 INFO L93 Difference]: Finished difference Result 14969 states and 70777 transitions. [2022-11-20 11:29:32,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:29:32,110 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:29:32,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:29:32,171 INFO L225 Difference]: With dead ends: 14969 [2022-11-20 11:29:32,171 INFO L226 Difference]: Without dead ends: 14969 [2022-11-20 11:29:32,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:29:32,171 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 19 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:29:32,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 5 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 323 Invalid, 0 Unknown, 35 Unchecked, 2.0s Time] [2022-11-20 11:29:32,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14969 states. [2022-11-20 11:29:32,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14969 to 14938. [2022-11-20 11:29:32,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14938 states, 14915 states have (on average 4.7353670801206835) internal successors, (70628), 14937 states have internal predecessors, (70628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:29:32,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14938 states to 14938 states and 70628 transitions. [2022-11-20 11:29:32,717 INFO L78 Accepts]: Start accepts. Automaton has 14938 states and 70628 transitions. Word has length 16 [2022-11-20 11:29:32,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:29:32,718 INFO L495 AbstractCegarLoop]: Abstraction has 14938 states and 70628 transitions. [2022-11-20 11:29:32,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:29:32,721 INFO L276 IsEmpty]: Start isEmpty. Operand 14938 states and 70628 transitions. [2022-11-20 11:29:32,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:29:32,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:29:32,726 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:29:32,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2022-11-20 11:29:32,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:29:32,946 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:29:32,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:29:32,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1714873165, now seen corresponding path program 4 times [2022-11-20 11:29:32,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:29:32,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341919373] [2022-11-20 11:29:32,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:29:32,947 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 [2022-11-20 11:29:32,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:29:32,948 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:29:32,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-20 11:29:33,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:29:33,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:29:33,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:29:33,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:29:33,526 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:29:33,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:29:33,908 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:29:33,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:29:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:29:35,354 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:29:35,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341919373] [2022-11-20 11:29:35,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341919373] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:29:35,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:29:35,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:29:35,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91831125] [2022-11-20 11:29:35,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:29:35,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:29:35,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:29:35,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:29:35,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:29:35,356 INFO L87 Difference]: Start difference. First operand 14938 states and 70628 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:29:38,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:29:38,132 INFO L93 Difference]: Finished difference Result 15005 states and 70936 transitions. [2022-11-20 11:29:38,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:29:38,133 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:29:38,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:29:38,359 INFO L225 Difference]: With dead ends: 15005 [2022-11-20 11:29:38,359 INFO L226 Difference]: Without dead ends: 15005 [2022-11-20 11:29:38,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:29:38,359 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 24 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:29:38,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 6 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 299 Invalid, 0 Unknown, 75 Unchecked, 1.9s Time] [2022-11-20 11:29:38,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15005 states. [2022-11-20 11:29:38,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15005 to 14974. [2022-11-20 11:29:38,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14974 states, 14951 states have (on average 4.735335429068289) internal successors, (70798), 14973 states have internal predecessors, (70798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:29:38,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14974 states to 14974 states and 70798 transitions. [2022-11-20 11:29:38,685 INFO L78 Accepts]: Start accepts. Automaton has 14974 states and 70798 transitions. Word has length 16 [2022-11-20 11:29:38,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:29:38,686 INFO L495 AbstractCegarLoop]: Abstraction has 14974 states and 70798 transitions. [2022-11-20 11:29:38,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:29:38,686 INFO L276 IsEmpty]: Start isEmpty. Operand 14974 states and 70798 transitions. [2022-11-20 11:29:38,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:29:38,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:29:38,822 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:29:38,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Forceful destruction successful, exit code 0 [2022-11-20 11:29:39,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:29:39,023 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:29:39,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:29:39,023 INFO L85 PathProgramCache]: Analyzing trace with hash 61323489, now seen corresponding path program 4 times [2022-11-20 11:29:39,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:29:39,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305791046] [2022-11-20 11:29:39,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:29:39,024 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 [2022-11-20 11:29:39,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:29:39,025 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:29:39,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-20 11:29:39,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:29:39,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:29:39,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:29:39,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:29:39,606 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:29:39,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:29:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:29:39,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:29:41,419 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:29:41,419 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:29:41,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1305791046] [2022-11-20 11:29:41,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1305791046] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:29:41,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:29:41,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:29:41,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793759757] [2022-11-20 11:29:41,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:29:41,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:29:41,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:29:41,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:29:41,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:29:41,420 INFO L87 Difference]: Start difference. First operand 14974 states and 70798 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:29:44,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:29:44,122 INFO L93 Difference]: Finished difference Result 15051 states and 71163 transitions. [2022-11-20 11:29:44,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:29:44,123 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:29:44,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:29:44,326 INFO L225 Difference]: With dead ends: 15051 [2022-11-20 11:29:44,326 INFO L226 Difference]: Without dead ends: 15051 [2022-11-20 11:29:44,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:29:44,327 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 28 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:29:44,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 5 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 311 Invalid, 0 Unknown, 58 Unchecked, 1.8s Time] [2022-11-20 11:29:44,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15051 states. [2022-11-20 11:29:44,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15051 to 15012. [2022-11-20 11:29:44,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15012 states, 14989 states have (on average 4.735606111148176) internal successors, (70982), 15011 states have internal predecessors, (70982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:29:44,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15012 states to 15012 states and 70982 transitions. [2022-11-20 11:29:44,677 INFO L78 Accepts]: Start accepts. Automaton has 15012 states and 70982 transitions. Word has length 16 [2022-11-20 11:29:44,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:29:44,677 INFO L495 AbstractCegarLoop]: Abstraction has 15012 states and 70982 transitions. [2022-11-20 11:29:44,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:29:44,678 INFO L276 IsEmpty]: Start isEmpty. Operand 15012 states and 70982 transitions. [2022-11-20 11:29:44,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:29:44,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:29:44,682 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:29:44,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Forceful destruction successful, exit code 0 [2022-11-20 11:29:44,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:29:44,882 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:29:44,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:29:44,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1866212398, now seen corresponding path program 3 times [2022-11-20 11:29:44,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:29:44,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1904497229] [2022-11-20 11:29:44,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:29:44,883 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 [2022-11-20 11:29:44,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:29:44,884 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:29:44,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-20 11:29:45,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:29:45,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:29:45,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:29:45,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:29:45,680 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:29:45,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:29:46,054 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:29:46,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:29:47,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:29:47,736 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:29:47,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1904497229] [2022-11-20 11:29:47,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1904497229] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:29:47,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:29:47,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:29:47,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250791244] [2022-11-20 11:29:47,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:29:47,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:29:47,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:29:47,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:29:47,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:29:47,737 INFO L87 Difference]: Start difference. First operand 15012 states and 70982 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:29:52,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:29:52,246 INFO L93 Difference]: Finished difference Result 16711 states and 76903 transitions. [2022-11-20 11:29:52,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:29:52,247 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:29:52,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:29:52,448 INFO L225 Difference]: With dead ends: 16711 [2022-11-20 11:29:52,448 INFO L226 Difference]: Without dead ends: 16711 [2022-11-20 11:29:52,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:29:52,449 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 35 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:29:52,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 8 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 546 Invalid, 0 Unknown, 87 Unchecked, 3.4s Time] [2022-11-20 11:29:52,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16711 states. [2022-11-20 11:29:52,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16711 to 15026. [2022-11-20 11:29:52,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15026 states, 15003 states have (on average 4.737052589482103) internal successors, (71070), 15025 states have internal predecessors, (71070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:29:52,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15026 states to 15026 states and 71070 transitions. [2022-11-20 11:29:52,808 INFO L78 Accepts]: Start accepts. Automaton has 15026 states and 71070 transitions. Word has length 16 [2022-11-20 11:29:52,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:29:52,808 INFO L495 AbstractCegarLoop]: Abstraction has 15026 states and 71070 transitions. [2022-11-20 11:29:52,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:29:52,920 INFO L276 IsEmpty]: Start isEmpty. Operand 15026 states and 71070 transitions. [2022-11-20 11:29:52,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:29:52,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:29:52,926 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:29:52,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2022-11-20 11:29:53,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:29:53,126 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:29:53,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:29:53,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1942864641, now seen corresponding path program 5 times [2022-11-20 11:29:53,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:29:53,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1308887774] [2022-11-20 11:29:53,127 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:29:53,127 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 [2022-11-20 11:29:53,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:29:53,128 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:29:53,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-20 11:29:53,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 11:29:53,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:29:53,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:29:53,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:29:53,743 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:29:53,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:29:54,137 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:29:54,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:29:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:29:55,633 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:29:55,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1308887774] [2022-11-20 11:29:55,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1308887774] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:29:55,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:29:55,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:29:55,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076583719] [2022-11-20 11:29:55,634 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:29:55,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:29:55,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:29:55,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:29:55,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:29:55,635 INFO L87 Difference]: Start difference. First operand 15026 states and 71070 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:29:58,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:29:58,963 INFO L93 Difference]: Finished difference Result 15115 states and 71488 transitions. [2022-11-20 11:29:58,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:29:58,965 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:29:58,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:29:59,030 INFO L225 Difference]: With dead ends: 15115 [2022-11-20 11:29:59,030 INFO L226 Difference]: Without dead ends: 15115 [2022-11-20 11:29:59,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:29:59,030 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 26 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:29:59,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 6 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 363 Invalid, 0 Unknown, 157 Unchecked, 2.2s Time] [2022-11-20 11:29:59,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15115 states. [2022-11-20 11:29:59,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15115 to 15051. [2022-11-20 11:29:59,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15051 states, 15028 states have (on average 4.737223848815544) internal successors, (71191), 15050 states have internal predecessors, (71191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:29:59,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15051 states to 15051 states and 71191 transitions. [2022-11-20 11:29:59,468 INFO L78 Accepts]: Start accepts. Automaton has 15051 states and 71191 transitions. Word has length 16 [2022-11-20 11:29:59,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:29:59,468 INFO L495 AbstractCegarLoop]: Abstraction has 15051 states and 71191 transitions. [2022-11-20 11:29:59,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:29:59,468 INFO L276 IsEmpty]: Start isEmpty. Operand 15051 states and 71191 transitions. [2022-11-20 11:29:59,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:29:59,472 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:29:59,472 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:29:59,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Ended with exit code 0 [2022-11-20 11:29:59,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:29:59,672 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:29:59,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:29:59,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1723066643, now seen corresponding path program 5 times [2022-11-20 11:29:59,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:29:59,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [77057012] [2022-11-20 11:29:59,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:29:59,674 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:29:59,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:29:59,674 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:29:59,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-20 11:30:00,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 11:30:00,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:30:00,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:30:00,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:30:00,262 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:30:00,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:30:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:30:00,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:30:02,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:30:02,229 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:30:02,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [77057012] [2022-11-20 11:30:02,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [77057012] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:30:02,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:30:02,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:30:02,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621672065] [2022-11-20 11:30:02,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:30:02,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:30:02,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:30:02,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:30:02,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:30:02,230 INFO L87 Difference]: Start difference. First operand 15051 states and 71191 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:30:05,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:30:05,839 INFO L93 Difference]: Finished difference Result 15189 states and 71901 transitions. [2022-11-20 11:30:05,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:30:05,840 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:30:05,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:30:05,896 INFO L225 Difference]: With dead ends: 15189 [2022-11-20 11:30:05,896 INFO L226 Difference]: Without dead ends: 15189 [2022-11-20 11:30:05,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:30:05,897 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 35 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:30:05,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 6 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 399 Invalid, 0 Unknown, 110 Unchecked, 2.5s Time] [2022-11-20 11:30:05,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15189 states. [2022-11-20 11:30:06,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15189 to 15091. [2022-11-20 11:30:06,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15091 states, 15068 states have (on average 4.738717812582958) internal successors, (71403), 15090 states have internal predecessors, (71403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:30:06,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15091 states to 15091 states and 71403 transitions. [2022-11-20 11:30:06,344 INFO L78 Accepts]: Start accepts. Automaton has 15091 states and 71403 transitions. Word has length 16 [2022-11-20 11:30:06,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:30:06,344 INFO L495 AbstractCegarLoop]: Abstraction has 15091 states and 71403 transitions. [2022-11-20 11:30:06,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:30:06,344 INFO L276 IsEmpty]: Start isEmpty. Operand 15091 states and 71403 transitions. [2022-11-20 11:30:06,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:30:06,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:30:06,349 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:30:06,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Forceful destruction successful, exit code 0 [2022-11-20 11:30:06,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:30:06,549 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:30:06,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:30:06,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1456357731, now seen corresponding path program 6 times [2022-11-20 11:30:06,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:30:06,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [111443600] [2022-11-20 11:30:06,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:30:06,550 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 [2022-11-20 11:30:06,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:30:06,551 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:30:06,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-20 11:30:06,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 11:30:06,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:30:06,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:30:06,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:30:07,199 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:30:07,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:30:07,577 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:30:07,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:30:09,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:30:09,221 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:30:09,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [111443600] [2022-11-20 11:30:09,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [111443600] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:30:09,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:30:09,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:30:09,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102808451] [2022-11-20 11:30:09,222 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:30:09,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:30:09,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:30:09,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:30:09,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:30:09,223 INFO L87 Difference]: Start difference. First operand 15091 states and 71403 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:30:14,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:30:14,017 INFO L93 Difference]: Finished difference Result 15885 states and 75197 transitions. [2022-11-20 11:30:14,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:30:14,018 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:30:14,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:30:14,081 INFO L225 Difference]: With dead ends: 15885 [2022-11-20 11:30:14,081 INFO L226 Difference]: Without dead ends: 15885 [2022-11-20 11:30:14,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:30:14,082 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 114 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:30:14,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 5 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 666 Invalid, 0 Unknown, 191 Unchecked, 3.9s Time] [2022-11-20 11:30:14,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15885 states. [2022-11-20 11:30:14,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15885 to 15736. [2022-11-20 11:30:14,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15736 states, 15713 states have (on average 4.741997072487749) internal successors, (74511), 15735 states have internal predecessors, (74511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:30:14,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15736 states to 15736 states and 74511 transitions. [2022-11-20 11:30:14,580 INFO L78 Accepts]: Start accepts. Automaton has 15736 states and 74511 transitions. Word has length 16 [2022-11-20 11:30:14,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:30:14,581 INFO L495 AbstractCegarLoop]: Abstraction has 15736 states and 74511 transitions. [2022-11-20 11:30:14,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:30:14,581 INFO L276 IsEmpty]: Start isEmpty. Operand 15736 states and 74511 transitions. [2022-11-20 11:30:14,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:30:14,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:30:14,585 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:30:14,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Forceful destruction successful, exit code 0 [2022-11-20 11:30:14,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:30:14,786 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:30:14,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:30:14,786 INFO L85 PathProgramCache]: Analyzing trace with hash -941033013, now seen corresponding path program 6 times [2022-11-20 11:30:14,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:30:14,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868737921] [2022-11-20 11:30:14,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:30:14,787 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 [2022-11-20 11:30:14,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:30:14,788 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:30:14,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-20 11:30:15,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 11:30:15,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:30:15,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:30:15,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:30:15,440 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:30:15,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:30:15,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:30:15,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:30:17,470 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:30:17,470 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:30:17,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868737921] [2022-11-20 11:30:17,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868737921] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:30:17,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:30:17,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:30:17,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751250823] [2022-11-20 11:30:17,471 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:30:17,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:30:17,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:30:17,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:30:17,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:30:17,472 INFO L87 Difference]: Start difference. First operand 15736 states and 74511 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:30:20,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:30:20,258 INFO L93 Difference]: Finished difference Result 15873 states and 75205 transitions. [2022-11-20 11:30:20,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:30:20,259 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:30:20,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:30:20,327 INFO L225 Difference]: With dead ends: 15873 [2022-11-20 11:30:20,328 INFO L226 Difference]: Without dead ends: 15873 [2022-11-20 11:30:20,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:30:20,328 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:30:20,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 4 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 336 Invalid, 0 Unknown, 18 Unchecked, 1.9s Time] [2022-11-20 11:30:20,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15873 states. [2022-11-20 11:30:20,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15873 to 15832. [2022-11-20 11:30:20,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15832 states, 15809 states have (on average 4.744322854070466) internal successors, (75003), 15831 states have internal predecessors, (75003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:30:20,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15832 states to 15832 states and 75003 transitions. [2022-11-20 11:30:20,798 INFO L78 Accepts]: Start accepts. Automaton has 15832 states and 75003 transitions. Word has length 16 [2022-11-20 11:30:20,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:30:20,798 INFO L495 AbstractCegarLoop]: Abstraction has 15832 states and 75003 transitions. [2022-11-20 11:30:20,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:30:20,798 INFO L276 IsEmpty]: Start isEmpty. Operand 15832 states and 75003 transitions. [2022-11-20 11:30:20,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:30:20,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:30:20,802 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:30:20,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Forceful destruction successful, exit code 0 [2022-11-20 11:30:21,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:30:21,003 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:30:21,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:30:21,003 INFO L85 PathProgramCache]: Analyzing trace with hash 205385423, now seen corresponding path program 7 times [2022-11-20 11:30:21,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:30:21,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [880529485] [2022-11-20 11:30:21,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:30:21,004 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 [2022-11-20 11:30:21,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:30:21,004 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:30:21,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-20 11:30:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:30:21,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:30:21,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:30:21,574 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:30:21,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:30:22,121 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:30:22,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:30:23,635 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:30:23,636 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:30:23,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [880529485] [2022-11-20 11:30:23,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [880529485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:30:23,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:30:23,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:30:23,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169153742] [2022-11-20 11:30:23,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:30:23,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:30:23,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:30:23,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:30:23,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:30:23,637 INFO L87 Difference]: Start difference. First operand 15832 states and 75003 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:30:27,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:30:27,387 INFO L93 Difference]: Finished difference Result 16109 states and 76401 transitions. [2022-11-20 11:30:27,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:30:27,388 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:30:27,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:30:27,452 INFO L225 Difference]: With dead ends: 16109 [2022-11-20 11:30:27,453 INFO L226 Difference]: Without dead ends: 16109 [2022-11-20 11:30:27,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:30:27,453 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 41 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:30:27,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 6 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 487 Invalid, 0 Unknown, 110 Unchecked, 2.8s Time] [2022-11-20 11:30:27,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16109 states. [2022-11-20 11:30:27,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16109 to 15884. [2022-11-20 11:30:27,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15884 states, 15861 states have (on average 4.745728516486981) internal successors, (75272), 15883 states have internal predecessors, (75272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:30:27,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15884 states to 15884 states and 75272 transitions. [2022-11-20 11:30:27,948 INFO L78 Accepts]: Start accepts. Automaton has 15884 states and 75272 transitions. Word has length 16 [2022-11-20 11:30:27,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:30:27,948 INFO L495 AbstractCegarLoop]: Abstraction has 15884 states and 75272 transitions. [2022-11-20 11:30:27,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:30:27,948 INFO L276 IsEmpty]: Start isEmpty. Operand 15884 states and 75272 transitions. [2022-11-20 11:30:27,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:30:27,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:30:27,953 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:30:27,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Ended with exit code 0 [2022-11-20 11:30:28,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:30:28,153 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:30:28,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:30:28,154 INFO L85 PathProgramCache]: Analyzing trace with hash 222008801, now seen corresponding path program 7 times [2022-11-20 11:30:28,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:30:28,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1724181812] [2022-11-20 11:30:28,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:30:28,154 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 [2022-11-20 11:30:28,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:30:28,155 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:30:28,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-20 11:30:28,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:30:28,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:30:28,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:30:28,940 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:30:28,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:30:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:30:29,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:30:30,834 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:30:30,834 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:30:30,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1724181812] [2022-11-20 11:30:30,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1724181812] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:30:30,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:30:30,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:30:30,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545042028] [2022-11-20 11:30:30,834 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:30:30,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:30:30,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:30:30,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:30:30,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:30:30,835 INFO L87 Difference]: Start difference. First operand 15884 states and 75272 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:30:34,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:30:34,344 INFO L93 Difference]: Finished difference Result 16158 states and 76632 transitions. [2022-11-20 11:30:34,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:30:34,345 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:30:34,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:30:34,564 INFO L225 Difference]: With dead ends: 16158 [2022-11-20 11:30:34,564 INFO L226 Difference]: Without dead ends: 16158 [2022-11-20 11:30:34,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:30:34,565 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 39 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:30:34,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 6 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 466 Invalid, 0 Unknown, 91 Unchecked, 2.6s Time] [2022-11-20 11:30:34,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16158 states. [2022-11-20 11:30:34,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16158 to 15950. [2022-11-20 11:30:34,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15950 states, 15927 states have (on average 4.746719407295787) internal successors, (75601), 15949 states have internal predecessors, (75601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:30:35,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15950 states to 15950 states and 75601 transitions. [2022-11-20 11:30:35,061 INFO L78 Accepts]: Start accepts. Automaton has 15950 states and 75601 transitions. Word has length 16 [2022-11-20 11:30:35,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:30:35,061 INFO L495 AbstractCegarLoop]: Abstraction has 15950 states and 75601 transitions. [2022-11-20 11:30:35,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:30:35,061 INFO L276 IsEmpty]: Start isEmpty. Operand 15950 states and 75601 transitions. [2022-11-20 11:30:35,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:30:35,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:30:35,066 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:30:35,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Forceful destruction successful, exit code 0 [2022-11-20 11:30:35,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:30:35,278 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:30:35,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:30:35,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1713511587, now seen corresponding path program 6 times [2022-11-20 11:30:35,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:30:35,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028202681] [2022-11-20 11:30:35,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:30:35,279 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 [2022-11-20 11:30:35,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:30:35,280 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:30:35,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-20 11:30:35,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 11:30:35,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:30:35,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:30:35,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:30:35,926 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:30:35,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:30:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:30:36,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:30:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:30:37,780 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:30:37,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028202681] [2022-11-20 11:30:37,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2028202681] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:30:37,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:30:37,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:30:37,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060665177] [2022-11-20 11:30:37,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:30:37,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:30:37,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:30:37,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:30:37,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:30:37,781 INFO L87 Difference]: Start difference. First operand 15950 states and 75601 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:30:40,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:30:40,749 INFO L93 Difference]: Finished difference Result 16125 states and 76560 transitions. [2022-11-20 11:30:40,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:30:40,750 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:30:40,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:30:40,952 INFO L225 Difference]: With dead ends: 16125 [2022-11-20 11:30:40,952 INFO L226 Difference]: Without dead ends: 16125 [2022-11-20 11:30:40,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:30:40,952 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 16 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:30:40,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 6 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 354 Invalid, 0 Unknown, 61 Unchecked, 2.0s Time] [2022-11-20 11:30:40,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16125 states. [2022-11-20 11:30:41,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16125 to 16080. [2022-11-20 11:30:41,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16080 states, 16057 states have (on average 4.75381453571651) internal successors, (76332), 16079 states have internal predecessors, (76332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:30:41,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16080 states to 16080 states and 76332 transitions. [2022-11-20 11:30:41,477 INFO L78 Accepts]: Start accepts. Automaton has 16080 states and 76332 transitions. Word has length 16 [2022-11-20 11:30:41,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:30:41,478 INFO L495 AbstractCegarLoop]: Abstraction has 16080 states and 76332 transitions. [2022-11-20 11:30:41,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:30:41,478 INFO L276 IsEmpty]: Start isEmpty. Operand 16080 states and 76332 transitions. [2022-11-20 11:30:41,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:30:41,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:30:41,484 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:30:41,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Forceful destruction successful, exit code 0 [2022-11-20 11:30:41,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:30:41,697 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:30:41,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:30:41,698 INFO L85 PathProgramCache]: Analyzing trace with hash -347295153, now seen corresponding path program 8 times [2022-11-20 11:30:41,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:30:41,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098001131] [2022-11-20 11:30:41,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:30:41,699 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 [2022-11-20 11:30:41,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:30:41,702 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:30:41,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-20 11:30:42,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:30:42,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:30:42,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:30:42,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:30:42,447 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:30:42,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:30:42,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:30:42,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:30:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:30:44,262 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:30:44,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098001131] [2022-11-20 11:30:44,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098001131] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:30:44,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:30:44,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:30:44,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563288627] [2022-11-20 11:30:44,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:30:44,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:30:44,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:30:44,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:30:44,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:30:44,264 INFO L87 Difference]: Start difference. First operand 16080 states and 76332 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:30:48,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:30:48,619 INFO L93 Difference]: Finished difference Result 16802 states and 79828 transitions. [2022-11-20 11:30:48,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:30:48,620 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:30:48,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:30:48,682 INFO L225 Difference]: With dead ends: 16802 [2022-11-20 11:30:48,682 INFO L226 Difference]: Without dead ends: 16802 [2022-11-20 11:30:48,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:30:48,683 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 120 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:30:48,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 4 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 655 Invalid, 0 Unknown, 206 Unchecked, 3.6s Time] [2022-11-20 11:30:48,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16802 states. [2022-11-20 11:30:49,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16802 to 16099. [2022-11-20 11:30:49,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16099 states, 16076 states have (on average 4.754105498880318) internal successors, (76427), 16098 states have internal predecessors, (76427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:30:49,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16099 states to 16099 states and 76427 transitions. [2022-11-20 11:30:49,201 INFO L78 Accepts]: Start accepts. Automaton has 16099 states and 76427 transitions. Word has length 16 [2022-11-20 11:30:49,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:30:49,202 INFO L495 AbstractCegarLoop]: Abstraction has 16099 states and 76427 transitions. [2022-11-20 11:30:49,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:30:49,202 INFO L276 IsEmpty]: Start isEmpty. Operand 16099 states and 76427 transitions. [2022-11-20 11:30:49,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:30:49,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:30:49,206 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:30:49,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Forceful destruction successful, exit code 0 [2022-11-20 11:30:49,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:30:49,406 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:30:49,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:30:49,407 INFO L85 PathProgramCache]: Analyzing trace with hash -550469773, now seen corresponding path program 7 times [2022-11-20 11:30:49,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:30:49,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109745097] [2022-11-20 11:30:49,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:30:49,407 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 [2022-11-20 11:30:49,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:30:49,408 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:30:49,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-11-20 11:30:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:30:49,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:30:49,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:30:49,984 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:30:49,985 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:30:50,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:30:50,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:30:51,865 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:30:51,865 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:30:51,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109745097] [2022-11-20 11:30:51,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109745097] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:30:51,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:30:51,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:30:51,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502243846] [2022-11-20 11:30:51,866 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:30:51,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:30:51,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:30:51,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:30:51,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:30:51,866 INFO L87 Difference]: Start difference. First operand 16099 states and 76427 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:30:56,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:30:56,028 INFO L93 Difference]: Finished difference Result 16566 states and 78855 transitions. [2022-11-20 11:30:56,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:30:56,029 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:30:56,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:30:56,093 INFO L225 Difference]: With dead ends: 16566 [2022-11-20 11:30:56,093 INFO L226 Difference]: Without dead ends: 16566 [2022-11-20 11:30:56,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:30:56,094 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 41 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:30:56,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 7 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 608 Invalid, 0 Unknown, 132 Unchecked, 3.2s Time] [2022-11-20 11:30:56,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16566 states. [2022-11-20 11:30:56,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16566 to 16288. [2022-11-20 11:30:56,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16288 states, 16265 states have (on average 4.760959114663388) internal successors, (77437), 16287 states have internal predecessors, (77437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:30:56,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16288 states to 16288 states and 77437 transitions. [2022-11-20 11:30:56,605 INFO L78 Accepts]: Start accepts. Automaton has 16288 states and 77437 transitions. Word has length 16 [2022-11-20 11:30:56,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:30:56,605 INFO L495 AbstractCegarLoop]: Abstraction has 16288 states and 77437 transitions. [2022-11-20 11:30:56,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:30:56,606 INFO L276 IsEmpty]: Start isEmpty. Operand 16288 states and 77437 transitions. [2022-11-20 11:30:56,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:30:56,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:30:56,610 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:30:56,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Forceful destruction successful, exit code 0 [2022-11-20 11:30:56,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:30:56,810 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:30:56,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:30:56,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1552098079, now seen corresponding path program 8 times [2022-11-20 11:30:56,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:30:56,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803455424] [2022-11-20 11:30:56,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:30:56,811 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 [2022-11-20 11:30:56,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:30:56,812 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:30:56,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-20 11:30:57,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:30:57,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:30:57,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:30:57,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:30:57,456 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:30:57,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:30:57,840 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:30:57,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:30:59,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:30:59,458 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:30:59,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803455424] [2022-11-20 11:30:59,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803455424] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:30:59,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:30:59,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:30:59,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636547666] [2022-11-20 11:30:59,459 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:30:59,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:30:59,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:30:59,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:30:59,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:30:59,460 INFO L87 Difference]: Start difference. First operand 16288 states and 77437 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:31:02,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:31:02,654 INFO L93 Difference]: Finished difference Result 16560 states and 78757 transitions. [2022-11-20 11:31:02,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:31:02,655 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:31:02,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:31:02,711 INFO L225 Difference]: With dead ends: 16560 [2022-11-20 11:31:02,711 INFO L226 Difference]: Without dead ends: 16560 [2022-11-20 11:31:02,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:31:02,712 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 52 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:31:02,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 6 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 370 Invalid, 0 Unknown, 107 Unchecked, 2.3s Time] [2022-11-20 11:31:02,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16560 states. [2022-11-20 11:31:03,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16560 to 16361. [2022-11-20 11:31:03,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16361 states, 16338 states have (on average 4.760252172848574) internal successors, (77773), 16360 states have internal predecessors, (77773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:31:03,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16361 states to 16361 states and 77773 transitions. [2022-11-20 11:31:03,186 INFO L78 Accepts]: Start accepts. Automaton has 16361 states and 77773 transitions. Word has length 16 [2022-11-20 11:31:03,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:31:03,186 INFO L495 AbstractCegarLoop]: Abstraction has 16361 states and 77773 transitions. [2022-11-20 11:31:03,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:31:03,186 INFO L276 IsEmpty]: Start isEmpty. Operand 16361 states and 77773 transitions. [2022-11-20 11:31:03,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:31:03,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:31:03,190 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:31:03,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Forceful destruction successful, exit code 0 [2022-11-20 11:31:03,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:31:03,390 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:31:03,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:31:03,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1771896077, now seen corresponding path program 8 times [2022-11-20 11:31:03,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:31:03,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [546979668] [2022-11-20 11:31:03,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:31:03,391 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 [2022-11-20 11:31:03,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:31:03,392 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:31:03,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2022-11-20 11:31:03,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:31:03,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:31:03,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:31:03,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:31:04,004 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:31:04,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:31:04,383 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:31:04,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:31:05,970 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:31:05,970 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:31:05,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [546979668] [2022-11-20 11:31:05,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [546979668] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:31:05,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:31:05,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:31:05,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819393618] [2022-11-20 11:31:05,971 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:31:05,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:31:05,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:31:05,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:31:05,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:31:05,972 INFO L87 Difference]: Start difference. First operand 16361 states and 77773 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:31:09,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:31:09,549 INFO L93 Difference]: Finished difference Result 17111 states and 81738 transitions. [2022-11-20 11:31:09,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:31:09,550 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:31:09,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:31:09,621 INFO L225 Difference]: With dead ends: 17111 [2022-11-20 11:31:09,621 INFO L226 Difference]: Without dead ends: 17111 [2022-11-20 11:31:09,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:31:09,622 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 62 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:31:09,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 6 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 475 Invalid, 0 Unknown, 126 Unchecked, 2.7s Time] [2022-11-20 11:31:09,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17111 states. [2022-11-20 11:31:10,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17111 to 16758. [2022-11-20 11:31:10,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16758 states, 16735 states have (on average 4.77980280848521) internal successors, (79990), 16757 states have internal predecessors, (79990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:31:10,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16758 states to 16758 states and 79990 transitions. [2022-11-20 11:31:10,158 INFO L78 Accepts]: Start accepts. Automaton has 16758 states and 79990 transitions. Word has length 16 [2022-11-20 11:31:10,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:31:10,158 INFO L495 AbstractCegarLoop]: Abstraction has 16758 states and 79990 transitions. [2022-11-20 11:31:10,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:31:10,159 INFO L276 IsEmpty]: Start isEmpty. Operand 16758 states and 79990 transitions. [2022-11-20 11:31:10,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:31:10,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:31:10,163 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:31:10,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (95)] Forceful destruction successful, exit code 0 [2022-11-20 11:31:10,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:31:10,364 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:31:10,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:31:10,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1926107713, now seen corresponding path program 9 times [2022-11-20 11:31:10,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:31:10,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [57267239] [2022-11-20 11:31:10,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:31:10,365 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 [2022-11-20 11:31:10,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:31:10,365 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:31:10,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2022-11-20 11:31:10,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:31:10,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:31:10,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:31:10,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:31:11,092 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:31:11,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:31:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:31:11,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:31:13,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:31:13,215 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:31:13,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [57267239] [2022-11-20 11:31:13,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [57267239] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:31:13,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:31:13,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:31:13,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587210635] [2022-11-20 11:31:13,215 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:31:13,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:31:13,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:31:13,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:31:13,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:31:13,216 INFO L87 Difference]: Start difference. First operand 16758 states and 79990 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:31:18,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:31:18,810 INFO L93 Difference]: Finished difference Result 18891 states and 88113 transitions. [2022-11-20 11:31:18,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:31:18,811 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:31:18,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:31:18,890 INFO L225 Difference]: With dead ends: 18891 [2022-11-20 11:31:18,890 INFO L226 Difference]: Without dead ends: 18891 [2022-11-20 11:31:18,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:31:18,890 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 97 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:31:18,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 7 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 813 Invalid, 0 Unknown, 187 Unchecked, 4.6s Time] [2022-11-20 11:31:19,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18891 states. [2022-11-20 11:31:19,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18891 to 16742. [2022-11-20 11:31:19,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16742 states, 16719 states have (on average 4.779711705245529) internal successors, (79912), 16741 states have internal predecessors, (79912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:31:19,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16742 states to 16742 states and 79912 transitions. [2022-11-20 11:31:19,693 INFO L78 Accepts]: Start accepts. Automaton has 16742 states and 79912 transitions. Word has length 16 [2022-11-20 11:31:19,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:31:19,693 INFO L495 AbstractCegarLoop]: Abstraction has 16742 states and 79912 transitions. [2022-11-20 11:31:19,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:31:19,694 INFO L276 IsEmpty]: Start isEmpty. Operand 16742 states and 79912 transitions. [2022-11-20 11:31:19,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:31:19,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:31:19,700 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:31:19,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (96)] Ended with exit code 0 [2022-11-20 11:31:19,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:31:19,915 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:31:19,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:31:19,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1942731091, now seen corresponding path program 9 times [2022-11-20 11:31:19,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:31:19,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [77212235] [2022-11-20 11:31:19,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:31:19,916 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 [2022-11-20 11:31:19,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:31:19,917 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:31:19,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2022-11-20 11:31:20,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:31:20,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:31:20,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:31:20,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:31:20,712 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:31:20,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:31:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:31:21,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:31:23,079 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:31:23,080 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:31:23,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [77212235] [2022-11-20 11:31:23,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [77212235] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:31:23,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:31:23,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:31:23,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171544571] [2022-11-20 11:31:23,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:31:23,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:31:23,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:31:23,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:31:23,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:31:23,082 INFO L87 Difference]: Start difference. First operand 16742 states and 79912 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:31:28,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:31:28,317 INFO L93 Difference]: Finished difference Result 18795 states and 87614 transitions. [2022-11-20 11:31:28,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:31:28,318 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:31:28,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:31:28,391 INFO L225 Difference]: With dead ends: 18795 [2022-11-20 11:31:28,391 INFO L226 Difference]: Without dead ends: 18795 [2022-11-20 11:31:28,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:31:28,391 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 62 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:31:28,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 8 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 705 Invalid, 0 Unknown, 138 Unchecked, 4.0s Time] [2022-11-20 11:31:28,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18795 states. [2022-11-20 11:31:28,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18795 to 16904. [2022-11-20 11:31:28,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16904 states, 16881 states have (on average 4.784728392867721) internal successors, (80771), 16903 states have internal predecessors, (80771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:31:28,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16904 states to 16904 states and 80771 transitions. [2022-11-20 11:31:28,896 INFO L78 Accepts]: Start accepts. Automaton has 16904 states and 80771 transitions. Word has length 16 [2022-11-20 11:31:28,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:31:28,896 INFO L495 AbstractCegarLoop]: Abstraction has 16904 states and 80771 transitions. [2022-11-20 11:31:28,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:31:28,897 INFO L276 IsEmpty]: Start isEmpty. Operand 16904 states and 80771 transitions. [2022-11-20 11:31:28,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:31:28,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:31:28,901 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:31:28,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (97)] Ended with exit code 0 [2022-11-20 11:31:29,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:31:29,101 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:31:29,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:31:29,101 INFO L85 PathProgramCache]: Analyzing trace with hash -576039551, now seen corresponding path program 9 times [2022-11-20 11:31:29,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:31:29,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137240705] [2022-11-20 11:31:29,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:31:29,102 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 [2022-11-20 11:31:29,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:31:29,106 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:31:29,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2022-11-20 11:31:29,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:31:29,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:31:29,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:31:29,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:31:29,811 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:31:29,812 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:31:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:31:30,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:31:31,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:31:31,915 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:31:31,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137240705] [2022-11-20 11:31:31,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137240705] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:31:31,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:31:31,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:31:31,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862621487] [2022-11-20 11:31:31,916 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:31:31,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:31:31,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:31:31,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:31:31,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:31:31,916 INFO L87 Difference]: Start difference. First operand 16904 states and 80771 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:31:34,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:31:34,081 INFO L93 Difference]: Finished difference Result 17049 states and 81579 transitions. [2022-11-20 11:31:34,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:31:34,082 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 16 [2022-11-20 11:31:34,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:31:34,153 INFO L225 Difference]: With dead ends: 17049 [2022-11-20 11:31:34,153 INFO L226 Difference]: Without dead ends: 17049 [2022-11-20 11:31:34,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:31:34,153 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 14 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:31:34,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 7 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 205 Invalid, 0 Unknown, 59 Unchecked, 1.0s Time] [2022-11-20 11:31:34,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17049 states. [2022-11-20 11:31:34,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17049 to 16890. [2022-11-20 11:31:34,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16890 states, 16867 states have (on average 4.784253275626964) internal successors, (80696), 16889 states have internal predecessors, (80696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:31:34,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16890 states to 16890 states and 80696 transitions. [2022-11-20 11:31:34,763 INFO L78 Accepts]: Start accepts. Automaton has 16890 states and 80696 transitions. Word has length 16 [2022-11-20 11:31:34,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:31:34,763 INFO L495 AbstractCegarLoop]: Abstraction has 16890 states and 80696 transitions. [2022-11-20 11:31:34,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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) [2022-11-20 11:31:34,763 INFO L276 IsEmpty]: Start isEmpty. Operand 16890 states and 80696 transitions. [2022-11-20 11:31:34,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:31:34,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:31:34,768 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:31:34,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (98)] Forceful destruction successful, exit code 0 [2022-11-20 11:31:34,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:31:34,969 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:31:34,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:31:34,969 INFO L85 PathProgramCache]: Analyzing trace with hash -65490781, now seen corresponding path program 4 times [2022-11-20 11:31:34,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:31:34,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [957761479] [2022-11-20 11:31:34,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:31:34,970 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 [2022-11-20 11:31:34,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:31:34,973 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:31:34,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2022-11-20 11:31:35,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:31:35,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:31:35,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:31:35,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:31:35,618 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:31:35,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:31:36,038 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:31:36,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:31:37,861 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:31:37,861 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:31:37,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [957761479] [2022-11-20 11:31:37,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [957761479] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:31:37,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:31:37,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-20 11:31:37,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630096378] [2022-11-20 11:31:37,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:31:37,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:31:37,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:31:37,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:31:37,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:31:37,862 INFO L87 Difference]: Start difference. First operand 16890 states and 80696 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2022-11-20 11:31:49,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:31:49,538 INFO L93 Difference]: Finished difference Result 22685 states and 107465 transitions. [2022-11-20 11:31:49,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 11:31:49,540 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 16 [2022-11-20 11:31:49,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:31:49,633 INFO L225 Difference]: With dead ends: 22685 [2022-11-20 11:31:49,633 INFO L226 Difference]: Without dead ends: 22685 [2022-11-20 11:31:49,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2022-11-20 11:31:49,634 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 386 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 319 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:31:49,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 9 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1413 Invalid, 0 Unknown, 319 Unchecked, 8.9s Time] [2022-11-20 11:31:49,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22685 states. [2022-11-20 11:31:50,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22685 to 17287. [2022-11-20 11:31:50,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17287 states, 17264 states have (on average 4.762279888785913) internal successors, (82216), 17286 states have internal predecessors, (82216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:31:50,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17287 states to 17287 states and 82216 transitions. [2022-11-20 11:31:50,375 INFO L78 Accepts]: Start accepts. Automaton has 17287 states and 82216 transitions. Word has length 16 [2022-11-20 11:31:50,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:31:50,375 INFO L495 AbstractCegarLoop]: Abstraction has 17287 states and 82216 transitions. [2022-11-20 11:31:50,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2022-11-20 11:31:50,375 INFO L276 IsEmpty]: Start isEmpty. Operand 17287 states and 82216 transitions. [2022-11-20 11:31:50,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:31:50,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:31:50,381 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:31:50,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (99)] Forceful destruction successful, exit code 0 [2022-11-20 11:31:50,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:31:50,595 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:31:50,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:31:50,595 INFO L85 PathProgramCache]: Analyzing trace with hash -72581039, now seen corresponding path program 4 times [2022-11-20 11:31:50,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:31:50,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986429956] [2022-11-20 11:31:50,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:31:50,596 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 [2022-11-20 11:31:50,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:31:50,596 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:31:50,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-11-20 11:31:50,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:31:50,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:31:50,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:31:50,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:31:51,198 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:31:51,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:31:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:31:51,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:31:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:31:53,373 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:31:53,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [986429956] [2022-11-20 11:31:53,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [986429956] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:31:53,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:31:53,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-20 11:31:53,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335395095] [2022-11-20 11:31:53,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:31:53,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:31:53,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:31:53,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:31:53,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:31:53,374 INFO L87 Difference]: Start difference. First operand 17287 states and 82216 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2022-11-20 11:31:59,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:31:59,929 INFO L93 Difference]: Finished difference Result 21654 states and 103086 transitions. [2022-11-20 11:31:59,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 11:31:59,931 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 16 [2022-11-20 11:31:59,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:32:00,017 INFO L225 Difference]: With dead ends: 21654 [2022-11-20 11:32:00,017 INFO L226 Difference]: Without dead ends: 21654 [2022-11-20 11:32:00,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2022-11-20 11:32:00,018 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 241 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 492 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:32:00,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 8 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 627 Invalid, 0 Unknown, 492 Unchecked, 3.4s Time] [2022-11-20 11:32:00,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21654 states. [2022-11-20 11:32:00,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21654 to 17286. [2022-11-20 11:32:00,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17286 states, 17263 states have (on average 4.762208190928575) internal successors, (82210), 17285 states have internal predecessors, (82210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:32:00,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17286 states to 17286 states and 82210 transitions. [2022-11-20 11:32:00,583 INFO L78 Accepts]: Start accepts. Automaton has 17286 states and 82210 transitions. Word has length 16 [2022-11-20 11:32:00,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:32:00,583 INFO L495 AbstractCegarLoop]: Abstraction has 17286 states and 82210 transitions. [2022-11-20 11:32:00,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2022-11-20 11:32:00,583 INFO L276 IsEmpty]: Start isEmpty. Operand 17286 states and 82210 transitions. [2022-11-20 11:32:00,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:32:00,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:32:00,588 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:32:00,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (100)] Forceful destruction successful, exit code 0 [2022-11-20 11:32:00,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:32:00,788 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:32:00,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:32:00,789 INFO L85 PathProgramCache]: Analyzing trace with hash -72044801, now seen corresponding path program 4 times [2022-11-20 11:32:00,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:32:00,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322875329] [2022-11-20 11:32:00,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:32:00,789 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 [2022-11-20 11:32:00,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:32:00,790 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:32:00,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2022-11-20 11:32:01,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:32:01,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:32:01,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:32:01,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:32:01,379 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:32:01,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:32:01,771 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:32:01,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:32:03,720 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:32:03,720 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:32:03,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322875329] [2022-11-20 11:32:03,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322875329] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:32:03,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:32:03,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-20 11:32:03,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037948186] [2022-11-20 11:32:03,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:32:03,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:32:03,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:32:03,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:32:03,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:32:03,722 INFO L87 Difference]: Start difference. First operand 17286 states and 82210 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2022-11-20 11:32:19,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:32:19,318 INFO L93 Difference]: Finished difference Result 28974 states and 138151 transitions. [2022-11-20 11:32:19,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 11:32:19,321 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 16 [2022-11-20 11:32:19,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:32:19,457 INFO L225 Difference]: With dead ends: 28974 [2022-11-20 11:32:19,457 INFO L226 Difference]: Without dead ends: 28974 [2022-11-20 11:32:19,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 11:32:19,457 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 386 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 2489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 684 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:32:19,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 11 Invalid, 2489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1798 Invalid, 0 Unknown, 684 Unchecked, 11.1s Time] [2022-11-20 11:32:19,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28974 states. [2022-11-20 11:32:20,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28974 to 17581. [2022-11-20 11:32:20,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17581 states, 17558 states have (on average 4.767627292402324) internal successors, (83710), 17580 states have internal predecessors, (83710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:32:20,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17581 states to 17581 states and 83710 transitions. [2022-11-20 11:32:20,192 INFO L78 Accepts]: Start accepts. Automaton has 17581 states and 83710 transitions. Word has length 16 [2022-11-20 11:32:20,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:32:20,192 INFO L495 AbstractCegarLoop]: Abstraction has 17581 states and 83710 transitions. [2022-11-20 11:32:20,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2022-11-20 11:32:20,192 INFO L276 IsEmpty]: Start isEmpty. Operand 17581 states and 83710 transitions. [2022-11-20 11:32:20,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:32:20,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:32:20,197 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:32:20,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (101)] Ended with exit code 0 [2022-11-20 11:32:20,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:32:20,397 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:32:20,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:32:20,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1994829599, now seen corresponding path program 2 times [2022-11-20 11:32:20,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:32:20,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [379696967] [2022-11-20 11:32:20,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:32:20,398 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 [2022-11-20 11:32:20,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:32:20,399 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:32:20,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2022-11-20 11:32:20,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:32:20,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:32:20,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 11:32:20,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:32:21,047 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:32:21,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:32:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:32:21,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:32:24,446 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:32:24,446 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:32:24,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [379696967] [2022-11-20 11:32:24,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [379696967] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:32:24,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:32:24,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2022-11-20 11:32:24,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789224635] [2022-11-20 11:32:24,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:32:24,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 11:32:24,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:32:24,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 11:32:24,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-11-20 11:32:24,448 INFO L87 Difference]: Start difference. First operand 17581 states and 83710 transitions. Second operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 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) [2022-11-20 11:32:51,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:32:51,881 INFO L93 Difference]: Finished difference Result 30915 states and 141786 transitions. [2022-11-20 11:32:51,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 11:32:51,883 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 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 16 [2022-11-20 11:32:51,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:32:52,003 INFO L225 Difference]: With dead ends: 30915 [2022-11-20 11:32:52,003 INFO L226 Difference]: Without dead ends: 30915 [2022-11-20 11:32:52,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=728, Invalid=1822, Unknown=0, NotChecked=0, Total=2550 [2022-11-20 11:32:52,004 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 2227 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 4238 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2227 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 4283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 4238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:32:52,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2227 Valid, 189 Invalid, 4283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 4238 Invalid, 0 Unknown, 0 Unchecked, 20.0s Time] [2022-11-20 11:32:52,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30915 states. [2022-11-20 11:32:52,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30915 to 16579. [2022-11-20 11:32:52,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16579 states, 16556 states have (on average 4.720343078038174) internal successors, (78150), 16578 states have internal predecessors, (78150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:32:52,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16579 states to 16579 states and 78150 transitions. [2022-11-20 11:32:52,630 INFO L78 Accepts]: Start accepts. Automaton has 16579 states and 78150 transitions. Word has length 16 [2022-11-20 11:32:52,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:32:52,631 INFO L495 AbstractCegarLoop]: Abstraction has 16579 states and 78150 transitions. [2022-11-20 11:32:52,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 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) [2022-11-20 11:32:52,631 INFO L276 IsEmpty]: Start isEmpty. Operand 16579 states and 78150 transitions. [2022-11-20 11:32:52,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:32:52,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:32:52,635 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:32:52,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (102)] Forceful destruction successful, exit code 0 [2022-11-20 11:32:52,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:32:52,836 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:32:52,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:32:52,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1162940177, now seen corresponding path program 4 times [2022-11-20 11:32:52,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:32:52,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440643520] [2022-11-20 11:32:52,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:32:52,836 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 [2022-11-20 11:32:52,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:32:52,837 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:32:52,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2022-11-20 11:32:53,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:32:53,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:32:53,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 11:32:53,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:32:53,455 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:32:53,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:32:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:32:54,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:32:56,099 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:32:56,099 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:32:56,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [440643520] [2022-11-20 11:32:56,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [440643520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:32:56,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:32:56,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-20 11:32:56,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552078758] [2022-11-20 11:32:56,100 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:32:56,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 11:32:56,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:32:56,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 11:32:56,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-11-20 11:32:56,101 INFO L87 Difference]: Start difference. First operand 16579 states and 78150 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2022-11-20 11:33:25,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:33:25,166 INFO L93 Difference]: Finished difference Result 30662 states and 140491 transitions. [2022-11-20 11:33:25,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-20 11:33:25,169 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 16 [2022-11-20 11:33:25,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:33:25,309 INFO L225 Difference]: With dead ends: 30662 [2022-11-20 11:33:25,310 INFO L226 Difference]: Without dead ends: 30662 [2022-11-20 11:33:25,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=559, Invalid=1891, Unknown=0, NotChecked=0, Total=2450 [2022-11-20 11:33:25,310 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1678 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 4388 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1678 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 4423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 4388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:33:25,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1678 Valid, 192 Invalid, 4423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 4388 Invalid, 0 Unknown, 0 Unchecked, 20.4s Time] [2022-11-20 11:33:25,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30662 states. [2022-11-20 11:33:26,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30662 to 21108. [2022-11-20 11:33:26,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21108 states, 21085 states have (on average 4.847284799620583) internal successors, (102205), 21107 states have internal predecessors, (102205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:26,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21108 states to 21108 states and 102205 transitions. [2022-11-20 11:33:26,216 INFO L78 Accepts]: Start accepts. Automaton has 21108 states and 102205 transitions. Word has length 16 [2022-11-20 11:33:26,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:33:26,216 INFO L495 AbstractCegarLoop]: Abstraction has 21108 states and 102205 transitions. [2022-11-20 11:33:26,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2022-11-20 11:33:26,217 INFO L276 IsEmpty]: Start isEmpty. Operand 21108 states and 102205 transitions. [2022-11-20 11:33:26,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:33:26,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:33:26,222 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:33:26,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Forceful destruction successful, exit code 0 [2022-11-20 11:33:26,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:33:26,423 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:33:26,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:26,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1511581233, now seen corresponding path program 5 times [2022-11-20 11:33:26,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:33:26,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819184888] [2022-11-20 11:33:26,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:33:26,424 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 [2022-11-20 11:33:26,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:33:26,425 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:33:26,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2022-11-20 11:33:26,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 11:33:26,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:33:26,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 11:33:26,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:33:27,107 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:33:27,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:33:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:33:27,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:33:29,903 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:33:29,904 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:33:29,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819184888] [2022-11-20 11:33:29,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819184888] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:33:29,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:33:29,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-20 11:33:29,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111653368] [2022-11-20 11:33:29,904 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:33:29,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 11:33:29,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:33:29,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 11:33:29,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:33:29,905 INFO L87 Difference]: Start difference. First operand 21108 states and 102205 transitions. Second operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 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) [2022-11-20 11:34:06,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:34:06,450 INFO L93 Difference]: Finished difference Result 29904 states and 139519 transitions. [2022-11-20 11:34:06,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-20 11:34:06,452 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 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 16 [2022-11-20 11:34:06,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:34:06,591 INFO L225 Difference]: With dead ends: 29904 [2022-11-20 11:34:06,591 INFO L226 Difference]: Without dead ends: 29904 [2022-11-20 11:34:06,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=501, Invalid=2151, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 11:34:06,591 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1598 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 5312 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1598 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 5349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 5312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:34:06,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1598 Valid, 249 Invalid, 5349 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [37 Valid, 5312 Invalid, 0 Unknown, 0 Unchecked, 25.7s Time] [2022-11-20 11:34:06,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29904 states. [2022-11-20 11:34:07,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29904 to 20443. [2022-11-20 11:34:07,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20443 states, 20420 states have (on average 4.770617042115573) internal successors, (97416), 20442 states have internal predecessors, (97416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:07,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20443 states to 20443 states and 97416 transitions. [2022-11-20 11:34:07,415 INFO L78 Accepts]: Start accepts. Automaton has 20443 states and 97416 transitions. Word has length 16 [2022-11-20 11:34:07,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:34:07,415 INFO L495 AbstractCegarLoop]: Abstraction has 20443 states and 97416 transitions. [2022-11-20 11:34:07,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 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) [2022-11-20 11:34:07,415 INFO L276 IsEmpty]: Start isEmpty. Operand 20443 states and 97416 transitions. [2022-11-20 11:34:07,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 11:34:07,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:34:07,420 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:34:07,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (104)] Forceful destruction successful, exit code 0 [2022-11-20 11:34:07,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:34:07,621 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:34:07,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:34:07,621 INFO L85 PathProgramCache]: Analyzing trace with hash -505692076, now seen corresponding path program 1 times [2022-11-20 11:34:07,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:34:07,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2056004642] [2022-11-20 11:34:07,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:34:07,622 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 [2022-11-20 11:34:07,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:34:07,622 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:34:07,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2022-11-20 11:34:07,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:07,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:34:07,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:34:08,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:34:08,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:34:08,005 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:34:08,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2056004642] [2022-11-20 11:34:08,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2056004642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:34:08,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:34:08,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:34:08,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706004753] [2022-11-20 11:34:08,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:34:08,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:34:08,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:34:08,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:34:08,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:34:08,007 INFO L87 Difference]: Start difference. First operand 20443 states and 97416 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:08,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:34:08,289 INFO L93 Difference]: Finished difference Result 19946 states and 95346 transitions. [2022-11-20 11:34:08,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:34:08,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 11:34:08,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:34:08,642 INFO L225 Difference]: With dead ends: 19946 [2022-11-20 11:34:08,642 INFO L226 Difference]: Without dead ends: 19946 [2022-11-20 11:34:08,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:34:08,643 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:34:08,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 1 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:34:08,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19946 states. [2022-11-20 11:34:09,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19946 to 19946. [2022-11-20 11:34:09,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19946 states, 19928 states have (on average 4.784524287434765) internal successors, (95346), 19945 states have internal predecessors, (95346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:09,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19946 states to 19946 states and 95346 transitions. [2022-11-20 11:34:09,289 INFO L78 Accepts]: Start accepts. Automaton has 19946 states and 95346 transitions. Word has length 17 [2022-11-20 11:34:09,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:34:09,289 INFO L495 AbstractCegarLoop]: Abstraction has 19946 states and 95346 transitions. [2022-11-20 11:34:09,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:09,289 INFO L276 IsEmpty]: Start isEmpty. Operand 19946 states and 95346 transitions. [2022-11-20 11:34:09,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 11:34:09,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:34:09,294 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:34:09,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (105)] Forceful destruction successful, exit code 0 [2022-11-20 11:34:09,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:34:09,494 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:34:09,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:34:09,495 INFO L85 PathProgramCache]: Analyzing trace with hash -505692075, now seen corresponding path program 1 times [2022-11-20 11:34:09,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:34:09,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419593277] [2022-11-20 11:34:09,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:34:09,496 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 [2022-11-20 11:34:09,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:34:09,497 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:34:09,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2022-11-20 11:34:09,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:09,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:34:09,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:34:09,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:34:09,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:34:09,932 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:34:09,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419593277] [2022-11-20 11:34:09,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419593277] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:34:09,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:34:09,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:34:09,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732232768] [2022-11-20 11:34:09,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:34:09,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:34:09,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:34:09,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:34:09,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:34:09,933 INFO L87 Difference]: Start difference. First operand 19946 states and 95346 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:10,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:34:10,232 INFO L93 Difference]: Finished difference Result 19449 states and 93276 transitions. [2022-11-20 11:34:10,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:34:10,233 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 11:34:10,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:34:10,517 INFO L225 Difference]: With dead ends: 19449 [2022-11-20 11:34:10,517 INFO L226 Difference]: Without dead ends: 19449 [2022-11-20 11:34:10,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:34:10,518 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:34:10,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:34:10,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19449 states. [2022-11-20 11:34:10,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19449 to 19449. [2022-11-20 11:34:10,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19449 states, 19436 states have (on average 4.799135624614118) internal successors, (93276), 19448 states have internal predecessors, (93276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:11,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19449 states to 19449 states and 93276 transitions. [2022-11-20 11:34:11,148 INFO L78 Accepts]: Start accepts. Automaton has 19449 states and 93276 transitions. Word has length 17 [2022-11-20 11:34:11,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:34:11,148 INFO L495 AbstractCegarLoop]: Abstraction has 19449 states and 93276 transitions. [2022-11-20 11:34:11,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:11,149 INFO L276 IsEmpty]: Start isEmpty. Operand 19449 states and 93276 transitions. [2022-11-20 11:34:11,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 11:34:11,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:34:11,154 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:34:11,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (106)] Forceful destruction successful, exit code 0 [2022-11-20 11:34:11,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:34:11,355 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:34:11,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:34:11,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1839549812, now seen corresponding path program 4 times [2022-11-20 11:34:11,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:34:11,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209585219] [2022-11-20 11:34:11,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:34:11,356 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 [2022-11-20 11:34:11,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:34:11,358 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:34:11,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2022-11-20 11:34:11,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:34:11,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:34:11,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:34:11,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:34:12,014 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:34:12,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:34:12,420 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:34:12,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:34:14,267 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:34:14,267 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:34:14,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1209585219] [2022-11-20 11:34:14,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1209585219] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:34:14,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:34:14,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-20 11:34:14,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568151093] [2022-11-20 11:34:14,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:34:14,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:34:14,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:34:14,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:34:14,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:34:14,269 INFO L87 Difference]: Start difference. First operand 19449 states and 93276 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:25,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:34:25,942 INFO L93 Difference]: Finished difference Result 22066 states and 102861 transitions. [2022-11-20 11:34:25,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 11:34:25,944 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 11:34:25,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:34:26,021 INFO L225 Difference]: With dead ends: 22066 [2022-11-20 11:34:26,021 INFO L226 Difference]: Without dead ends: 22066 [2022-11-20 11:34:26,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-11-20 11:34:26,022 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 516 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 1414 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 1714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 293 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:34:26,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 11 Invalid, 1714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1414 Invalid, 0 Unknown, 293 Unchecked, 8.8s Time] [2022-11-20 11:34:26,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22066 states. [2022-11-20 11:34:26,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22066 to 19950. [2022-11-20 11:34:26,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19950 states, 19937 states have (on average 4.783417765962783) internal successors, (95367), 19949 states have internal predecessors, (95367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:26,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19950 states to 19950 states and 95367 transitions. [2022-11-20 11:34:26,794 INFO L78 Accepts]: Start accepts. Automaton has 19950 states and 95367 transitions. Word has length 17 [2022-11-20 11:34:26,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:34:26,794 INFO L495 AbstractCegarLoop]: Abstraction has 19950 states and 95367 transitions. [2022-11-20 11:34:26,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:26,795 INFO L276 IsEmpty]: Start isEmpty. Operand 19950 states and 95367 transitions. [2022-11-20 11:34:26,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 11:34:26,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:34:26,800 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:34:26,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (107)] Forceful destruction successful, exit code 0 [2022-11-20 11:34:27,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:34:27,000 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-20 11:34:27,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:34:27,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1841992674, now seen corresponding path program 10 times [2022-11-20 11:34:27,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:34:27,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [86843746] [2022-11-20 11:34:27,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:34:27,001 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 [2022-11-20 11:34:27,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:34:27,002 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:34:27,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876911b1-ec59-460e-97b4-128fdc7aee08/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2022-11-20 11:34:27,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:34:27,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:34:27,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:34:27,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:34:27,650 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:34:27,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:34:28,077 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:34:28,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:34:29,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:34:29,910 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:34:29,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [86843746] [2022-11-20 11:34:29,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [86843746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:34:29,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:34:29,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-20 11:34:29,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346972546] [2022-11-20 11:34:29,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:34:29,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:34:29,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:34:29,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:34:29,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:34:29,911 INFO L87 Difference]: Start difference. First operand 19950 states and 95367 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)