./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a --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 eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc --- 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-b5237d8 [2022-11-21 13:51:40,733 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 13:51:40,736 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 13:51:40,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 13:51:40,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 13:51:40,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 13:51:40,795 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 13:51:40,798 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 13:51:40,801 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 13:51:40,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 13:51:40,807 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 13:51:40,809 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 13:51:40,809 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 13:51:40,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 13:51:40,811 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 13:51:40,813 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 13:51:40,814 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 13:51:40,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 13:51:40,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 13:51:40,825 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 13:51:40,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 13:51:40,831 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 13:51:40,832 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 13:51:40,833 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 13:51:40,840 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 13:51:40,840 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 13:51:40,840 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 13:51:40,843 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 13:51:40,843 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 13:51:40,845 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 13:51:40,846 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 13:51:40,847 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 13:51:40,849 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 13:51:40,851 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 13:51:40,853 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 13:51:40,854 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 13:51:40,855 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 13:51:40,855 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 13:51:40,855 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 13:51:40,856 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 13:51:40,857 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 13:51:40,858 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-21 13:51:40,894 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 13:51:40,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 13:51:40,895 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 13:51:40,895 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 13:51:40,896 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 13:51:40,897 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 13:51:40,897 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 13:51:40,898 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 13:51:40,898 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 13:51:40,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 13:51:40,899 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 13:51:40,899 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 13:51:40,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 13:51:40,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 13:51:40,900 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 13:51:40,900 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-21 13:51:40,900 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-21 13:51:40,900 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-21 13:51:40,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 13:51:40,901 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-21 13:51:40,901 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 13:51:40,901 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 13:51:40,902 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 13:51:40,902 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 13:51:40,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 13:51:40,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:51:40,903 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 13:51:40,903 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 13:51:40,903 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 13:51:40,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 13:51:40,903 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_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc [2022-11-21 13:51:41,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 13:51:41,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 13:51:41,245 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 13:51:41,246 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 13:51:41,247 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 13:51:41,248 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2022-11-21 13:51:44,253 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 13:51:44,464 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 13:51:44,465 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2022-11-21 13:51:44,471 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/data/2ce97de96/df2f3b9798134704b392098b5d8558a8/FLAG5dd8311f3 [2022-11-21 13:51:44,485 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/data/2ce97de96/df2f3b9798134704b392098b5d8558a8 [2022-11-21 13:51:44,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 13:51:44,489 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 13:51:44,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 13:51:44,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 13:51:44,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 13:51:44,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:51:44" (1/1) ... [2022-11-21 13:51:44,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75c98904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:44, skipping insertion in model container [2022-11-21 13:51:44,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:51:44" (1/1) ... [2022-11-21 13:51:44,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 13:51:44,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 13:51:44,731 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_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2022-11-21 13:51:44,740 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:51:44,753 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) [2022-11-21 13:51:44,753 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@dc99e20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:44, skipping insertion in model container [2022-11-21 13:51:44,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 13:51:44,754 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-21 13:51:44,756 INFO L158 Benchmark]: Toolchain (without parser) took 265.92ms. Allocated memory was 136.3MB in the beginning and 188.7MB in the end (delta: 52.4MB). Free memory was 73.7MB in the beginning and 157.2MB in the end (delta: -83.5MB). Peak memory consumption was 11.6MB. Max. memory is 16.1GB. [2022-11-21 13:51:44,756 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 136.3MB. Free memory is still 109.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 13:51:44,757 INFO L158 Benchmark]: CACSL2BoogieTranslator took 263.16ms. Allocated memory was 136.3MB in the beginning and 188.7MB in the end (delta: 52.4MB). Free memory was 73.5MB in the beginning and 157.3MB in the end (delta: -83.7MB). Peak memory consumption was 11.6MB. Max. memory is 16.1GB. [2022-11-21 13:51:44,759 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 136.3MB. Free memory is still 109.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 263.16ms. Allocated memory was 136.3MB in the beginning and 188.7MB in the end (delta: 52.4MB). Free memory was 73.5MB in the beginning and 157.3MB in the end (delta: -83.7MB). Peak memory consumption was 11.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 112]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a --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 eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc --- 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-b5237d8 [2022-11-21 13:51:47,174 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 13:51:47,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 13:51:47,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 13:51:47,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 13:51:47,226 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 13:51:47,228 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 13:51:47,232 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 13:51:47,234 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 13:51:47,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 13:51:47,241 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 13:51:47,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 13:51:47,245 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 13:51:47,247 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 13:51:47,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 13:51:47,255 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 13:51:47,256 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 13:51:47,257 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 13:51:47,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 13:51:47,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 13:51:47,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 13:51:47,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 13:51:47,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 13:51:47,269 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 13:51:47,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 13:51:47,282 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 13:51:47,283 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 13:51:47,285 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 13:51:47,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 13:51:47,286 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 13:51:47,287 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 13:51:47,288 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 13:51:47,290 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 13:51:47,291 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 13:51:47,301 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 13:51:47,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 13:51:47,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 13:51:47,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 13:51:47,303 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 13:51:47,304 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 13:51:47,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 13:51:47,309 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-21 13:51:47,351 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 13:51:47,352 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 13:51:47,353 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 13:51:47,354 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 13:51:47,355 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 13:51:47,355 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 13:51:47,356 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 13:51:47,356 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 13:51:47,356 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 13:51:47,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 13:51:47,358 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 13:51:47,358 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 13:51:47,359 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 13:51:47,359 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 13:51:47,359 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 13:51:47,359 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-21 13:51:47,359 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-21 13:51:47,360 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-21 13:51:47,360 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 13:51:47,360 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-21 13:51:47,360 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-21 13:51:47,361 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-21 13:51:47,361 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 13:51:47,361 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 13:51:47,361 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 13:51:47,362 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 13:51:47,362 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 13:51:47,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:51:47,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 13:51:47,363 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 13:51:47,363 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-21 13:51:47,363 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-21 13:51:47,364 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-21 13:51:47,364 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_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc [2022-11-21 13:51:47,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 13:51:47,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 13:51:47,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 13:51:47,825 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 13:51:47,826 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 13:51:47,828 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2022-11-21 13:51:51,186 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 13:51:51,414 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 13:51:51,415 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2022-11-21 13:51:51,423 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/data/ae6b79460/293c575e1c514a15ac7d82d4a3b5e128/FLAGb87327e44 [2022-11-21 13:51:51,440 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/data/ae6b79460/293c575e1c514a15ac7d82d4a3b5e128 [2022-11-21 13:51:51,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 13:51:51,444 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 13:51:51,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 13:51:51,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 13:51:51,453 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 13:51:51,454 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:51:51" (1/1) ... [2022-11-21 13:51:51,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ae82833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:51, skipping insertion in model container [2022-11-21 13:51:51,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:51:51" (1/1) ... [2022-11-21 13:51:51,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 13:51:51,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 13:51:51,749 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_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2022-11-21 13:51:51,760 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:51:51,773 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-21 13:51:51,777 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 13:51:51,791 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_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2022-11-21 13:51:51,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:51:51,800 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 13:51:51,823 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_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2022-11-21 13:51:51,827 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:51:51,844 INFO L208 MainTranslator]: Completed translation [2022-11-21 13:51:51,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:51 WrapperNode [2022-11-21 13:51:51,845 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 13:51:51,846 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 13:51:51,846 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 13:51:51,846 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 13:51:51,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:51" (1/1) ... [2022-11-21 13:51:51,865 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:51" (1/1) ... [2022-11-21 13:51:51,888 INFO L138 Inliner]: procedures = 28, calls = 43, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 120 [2022-11-21 13:51:51,888 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 13:51:51,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 13:51:51,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 13:51:51,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 13:51:51,900 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:51" (1/1) ... [2022-11-21 13:51:51,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:51" (1/1) ... [2022-11-21 13:51:51,904 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:51" (1/1) ... [2022-11-21 13:51:51,905 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:51" (1/1) ... [2022-11-21 13:51:51,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:51" (1/1) ... [2022-11-21 13:51:51,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:51" (1/1) ... [2022-11-21 13:51:51,922 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:51" (1/1) ... [2022-11-21 13:51:51,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:51" (1/1) ... [2022-11-21 13:51:51,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 13:51:51,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 13:51:51,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 13:51:51,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 13:51:51,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:51" (1/1) ... [2022-11-21 13:51:51,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:51:51,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:51:51,978 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 13:51:51,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 13:51:52,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 13:51:52,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-21 13:51:52,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 13:51:52,018 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-21 13:51:52,018 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-21 13:51:52,018 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-21 13:51:52,018 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-21 13:51:52,018 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-21 13:51:52,018 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-21 13:51:52,019 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-21 13:51:52,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-21 13:51:52,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-21 13:51:52,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 13:51:52,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 13:51:52,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 13:51:52,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 13:51:52,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-21 13:51:52,021 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 13:51:52,152 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 13:51:52,154 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 13:51:52,835 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 13:51:52,910 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 13:51:52,910 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-21 13:51:52,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:51:52 BoogieIcfgContainer [2022-11-21 13:51:52,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 13:51:52,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 13:51:52,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 13:51:52,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 13:51:52,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:51:51" (1/3) ... [2022-11-21 13:51:52,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ecd7dac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:51:52, skipping insertion in model container [2022-11-21 13:51:52,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:51:51" (2/3) ... [2022-11-21 13:51:52,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ecd7dac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:51:52, skipping insertion in model container [2022-11-21 13:51:52,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:51:52" (3/3) ... [2022-11-21 13:51:52,934 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2022-11-21 13:51:52,951 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 13:51:52,951 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2022-11-21 13:51:52,951 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 13:51:53,134 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-21 13:51:53,190 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-21 13:51:53,212 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 213 transitions, 450 flow [2022-11-21 13:51:53,218 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 213 transitions, 450 flow [2022-11-21 13:51:53,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 213 transitions, 450 flow [2022-11-21 13:51:53,345 INFO L130 PetriNetUnfolder]: 16/210 cut-off events. [2022-11-21 13:51:53,345 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-21 13:51:53,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 210 events. 16/210 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 222 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 158. Up to 3 conditions per place. [2022-11-21 13:51:53,357 INFO L119 LiptonReduction]: Number of co-enabled transitions 2868 [2022-11-21 13:52:22,003 INFO L134 LiptonReduction]: Checked pairs total: 4777 [2022-11-21 13:52:22,004 INFO L136 LiptonReduction]: Total number of compositions: 216 [2022-11-21 13:52:22,011 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 62 places, 58 transitions, 140 flow [2022-11-21 13:52:22,134 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1369 states, 1155 states have (on average 4.29004329004329) internal successors, (4955), 1368 states have internal predecessors, (4955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:22,153 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 13:52:22,160 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;@4d5ef357, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 13:52:22,160 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2022-11-21 13:52:22,167 INFO L276 IsEmpty]: Start isEmpty. Operand has 1369 states, 1155 states have (on average 4.29004329004329) internal successors, (4955), 1368 states have internal predecessors, (4955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:22,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-21 13:52:22,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:22,173 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-21 13:52:22,173 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:52:22,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:22,179 INFO L85 PathProgramCache]: Analyzing trace with hash 25432, now seen corresponding path program 1 times [2022-11-21 13:52:22,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:52:22,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2110626483] [2022-11-21 13:52:22,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:22,193 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 [2022-11-21 13:52:22,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:52:22,203 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:52:22,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:52:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:22,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 13:52:22,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:52:22,668 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 13:52:22,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-21 13:52:22,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:22,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:52:22,718 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:52:22,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2110626483] [2022-11-21 13:52:22,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2110626483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:52:22,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:52:22,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 13:52:22,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271493177] [2022-11-21 13:52:22,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:52:22,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:52:22,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:52:22,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:52:22,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:52:22,755 INFO L87 Difference]: Start difference. First operand has 1369 states, 1155 states have (on average 4.29004329004329) internal successors, (4955), 1368 states have internal predecessors, (4955), 0 states have call successors, (0), 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) [2022-11-21 13:52:23,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:23,372 INFO L93 Difference]: Finished difference Result 2733 states and 9905 transitions. [2022-11-21 13:52:23,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:52:23,375 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 [2022-11-21 13:52:23,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:23,422 INFO L225 Difference]: With dead ends: 2733 [2022-11-21 13:52:23,423 INFO L226 Difference]: Without dead ends: 2733 [2022-11-21 13:52:23,424 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 [2022-11-21 13:52:23,431 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:23,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 6 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 13:52:23,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2022-11-21 13:52:23,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 1370. [2022-11-21 13:52:23,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1157 states have (on average 4.288677614520311) internal successors, (4962), 1369 states have internal predecessors, (4962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:23,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 4962 transitions. [2022-11-21 13:52:23,619 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 4962 transitions. Word has length 2 [2022-11-21 13:52:23,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:23,619 INFO L495 AbstractCegarLoop]: Abstraction has 1370 states and 4962 transitions. [2022-11-21 13:52:23,620 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) [2022-11-21 13:52:23,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 4962 transitions. [2022-11-21 13:52:23,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-21 13:52:23,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:23,622 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-21 13:52:23,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:52:23,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:52:23,839 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:52:23,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:23,839 INFO L85 PathProgramCache]: Analyzing trace with hash 25434, now seen corresponding path program 1 times [2022-11-21 13:52:23,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:52:23,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [42910398] [2022-11-21 13:52:23,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:23,840 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 [2022-11-21 13:52:23,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:52:23,844 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:52:23,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:52:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:23,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 13:52:23,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:52:24,033 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-21 13:52:24,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-21 13:52:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:24,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:52:24,049 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:52:24,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [42910398] [2022-11-21 13:52:24,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [42910398] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:52:24,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:52:24,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 13:52:24,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952168447] [2022-11-21 13:52:24,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:52:24,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:52:24,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:52:24,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:52:24,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:52:24,053 INFO L87 Difference]: Start difference. First operand 1370 states and 4962 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) [2022-11-21 13:52:24,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:24,338 INFO L93 Difference]: Finished difference Result 1368 states and 4958 transitions. [2022-11-21 13:52:24,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:52:24,339 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 [2022-11-21 13:52:24,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:24,350 INFO L225 Difference]: With dead ends: 1368 [2022-11-21 13:52:24,350 INFO L226 Difference]: Without dead ends: 1368 [2022-11-21 13:52:24,350 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 [2022-11-21 13:52:24,355 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:24,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 3 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 13:52:24,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2022-11-21 13:52:24,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1368. [2022-11-21 13:52:24,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1157 states have (on average 4.285220397579948) internal successors, (4958), 1367 states have internal predecessors, (4958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:24,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 4958 transitions. [2022-11-21 13:52:24,457 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 4958 transitions. Word has length 2 [2022-11-21 13:52:24,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:24,457 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 4958 transitions. [2022-11-21 13:52:24,470 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) [2022-11-21 13:52:24,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 4958 transitions. [2022-11-21 13:52:24,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-21 13:52:24,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:24,472 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-21 13:52:24,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:52:24,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:52:24,683 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:52:24,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:24,683 INFO L85 PathProgramCache]: Analyzing trace with hash 795313, now seen corresponding path program 1 times [2022-11-21 13:52:24,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:52:24,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309418015] [2022-11-21 13:52:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:24,685 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 [2022-11-21 13:52:24,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:52:24,686 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:52:24,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:52:24,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:24,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-21 13:52:24,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:52:24,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:24,948 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-21 13:52:24,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-21 13:52:25,131 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-21 13:52:25,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-21 13:52:25,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:25,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:52:25,145 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:52:25,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309418015] [2022-11-21 13:52:25,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309418015] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:52:25,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:52:25,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 13:52:25,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419336211] [2022-11-21 13:52:25,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:52:25,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:52:25,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:52:25,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:52:25,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:52:25,148 INFO L87 Difference]: Start difference. First operand 1368 states and 4958 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) [2022-11-21 13:52:25,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:25,460 INFO L93 Difference]: Finished difference Result 1127 states and 3956 transitions. [2022-11-21 13:52:25,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:52:25,461 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 [2022-11-21 13:52:25,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:25,470 INFO L225 Difference]: With dead ends: 1127 [2022-11-21 13:52:25,470 INFO L226 Difference]: Without dead ends: 1127 [2022-11-21 13:52:25,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:52:25,471 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:25,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 3 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 13:52:25,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-11-21 13:52:25,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 1127. [2022-11-21 13:52:25,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 962 states have (on average 4.112266112266112) internal successors, (3956), 1126 states have internal predecessors, (3956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:25,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3956 transitions. [2022-11-21 13:52:25,553 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3956 transitions. Word has length 3 [2022-11-21 13:52:25,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:25,553 INFO L495 AbstractCegarLoop]: Abstraction has 1127 states and 3956 transitions. [2022-11-21 13:52:25,554 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) [2022-11-21 13:52:25,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3956 transitions. [2022-11-21 13:52:25,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-21 13:52:25,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:25,555 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-21 13:52:25,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:52:25,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:52:25,767 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:52:25,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:25,767 INFO L85 PathProgramCache]: Analyzing trace with hash 795312, now seen corresponding path program 1 times [2022-11-21 13:52:25,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:52:25,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855866718] [2022-11-21 13:52:25,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:25,768 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 [2022-11-21 13:52:25,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:52:25,770 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:52:25,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:52:25,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:25,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 13:52:25,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:52:25,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:25,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:25,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:25,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:26,039 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-21 13:52:26,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-11-21 13:52:26,080 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-21 13:52:26,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-21 13:52:26,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:26,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-21 13:52:26,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:26,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:52:26,193 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:52:26,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1855866718] [2022-11-21 13:52:26,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1855866718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:52:26,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:52:26,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:52:26,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197427379] [2022-11-21 13:52:26,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:52:26,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:52:26,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:52:26,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:52:26,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:52:26,195 INFO L87 Difference]: Start difference. First operand 1127 states and 3956 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:26,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:26,498 INFO L93 Difference]: Finished difference Result 886 states and 2954 transitions. [2022-11-21 13:52:26,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:52:26,499 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-21 13:52:26,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:26,506 INFO L225 Difference]: With dead ends: 886 [2022-11-21 13:52:26,506 INFO L226 Difference]: Without dead ends: 886 [2022-11-21 13:52:26,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:52:26,509 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 45 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:26,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 3 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 13:52:26,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-11-21 13:52:26,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 886. [2022-11-21 13:52:26,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 767 states have (on average 3.851368970013038) internal successors, (2954), 885 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:26,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 2954 transitions. [2022-11-21 13:52:26,557 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 2954 transitions. Word has length 3 [2022-11-21 13:52:26,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:26,557 INFO L495 AbstractCegarLoop]: Abstraction has 886 states and 2954 transitions. [2022-11-21 13:52:26,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:26,558 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 2954 transitions. [2022-11-21 13:52:26,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-21 13:52:26,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:26,558 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-21 13:52:26,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:52:26,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:52:26,770 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:52:26,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:26,771 INFO L85 PathProgramCache]: Analyzing trace with hash 793581, now seen corresponding path program 1 times [2022-11-21 13:52:26,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:52:26,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1662903003] [2022-11-21 13:52:26,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:26,771 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:52:26,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:52:26,772 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:52:26,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:52:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:26,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 13:52:26,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:52:26,988 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 13:52:26,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-21 13:52:27,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:27,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:52:27,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:27,367 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:52:27,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1662903003] [2022-11-21 13:52:27,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1662903003] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:52:27,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:52:27,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-21 13:52:27,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184515517] [2022-11-21 13:52:27,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:52:27,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 13:52:27,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:52:27,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 13:52:27,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-21 13:52:27,369 INFO L87 Difference]: Start difference. First operand 886 states and 2954 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) [2022-11-21 13:52:28,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:28,879 INFO L93 Difference]: Finished difference Result 2650 states and 8852 transitions. [2022-11-21 13:52:28,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 13:52:28,880 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 [2022-11-21 13:52:28,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:28,901 INFO L225 Difference]: With dead ends: 2650 [2022-11-21 13:52:28,902 INFO L226 Difference]: Without dead ends: 2650 [2022-11-21 13:52:28,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:52:28,903 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 288 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:28,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 12 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-21 13:52:28,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2022-11-21 13:52:28,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 892. [2022-11-21 13:52:28,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 773 states have (on average 3.8369987063389392) internal successors, (2966), 891 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:28,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 2966 transitions. [2022-11-21 13:52:28,964 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 2966 transitions. Word has length 3 [2022-11-21 13:52:28,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:28,964 INFO L495 AbstractCegarLoop]: Abstraction has 892 states and 2966 transitions. [2022-11-21 13:52:28,965 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) [2022-11-21 13:52:28,965 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 2966 transitions. [2022-11-21 13:52:28,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-21 13:52:28,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:28,965 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-21 13:52:28,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:52:29,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:52:29,177 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:52:29,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:29,177 INFO L85 PathProgramCache]: Analyzing trace with hash 764311591, now seen corresponding path program 1 times [2022-11-21 13:52:29,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:52:29,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1663941914] [2022-11-21 13:52:29,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:29,178 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 [2022-11-21 13:52:29,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:52:29,179 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:52:29,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:52:29,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:29,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-21 13:52:29,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:52:29,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:29,403 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-21 13:52:29,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-21 13:52:29,808 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-21 13:52:29,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-21 13:52:29,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:29,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:52:29,936 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:52:29,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1663941914] [2022-11-21 13:52:29,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1663941914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:52:29,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:52:29,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 13:52:29,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183661627] [2022-11-21 13:52:29,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:52:29,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:52:29,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:52:29,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:52:29,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:52:29,939 INFO L87 Difference]: Start difference. First operand 892 states and 2966 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) [2022-11-21 13:52:30,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:30,229 INFO L93 Difference]: Finished difference Result 839 states and 2804 transitions. [2022-11-21 13:52:30,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:52:30,230 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 [2022-11-21 13:52:30,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:30,236 INFO L225 Difference]: With dead ends: 839 [2022-11-21 13:52:30,236 INFO L226 Difference]: Without dead ends: 839 [2022-11-21 13:52:30,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:52:30,237 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:30,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 3 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 13:52:30,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2022-11-21 13:52:30,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 839. [2022-11-21 13:52:30,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 738 states have (on average 3.799457994579946) internal successors, (2804), 838 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:30,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2804 transitions. [2022-11-21 13:52:30,276 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2804 transitions. Word has length 5 [2022-11-21 13:52:30,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:30,277 INFO L495 AbstractCegarLoop]: Abstraction has 839 states and 2804 transitions. [2022-11-21 13:52:30,277 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) [2022-11-21 13:52:30,277 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2804 transitions. [2022-11-21 13:52:30,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-21 13:52:30,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:30,278 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-21 13:52:30,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-21 13:52:30,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:52:30,490 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:52:30,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:30,490 INFO L85 PathProgramCache]: Analyzing trace with hash 764311593, now seen corresponding path program 1 times [2022-11-21 13:52:30,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:52:30,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1792763005] [2022-11-21 13:52:30,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:30,491 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 [2022-11-21 13:52:30,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:52:30,492 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:52:30,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:52:30,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:30,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 13:52:30,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:52:30,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:30,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:30,719 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-21 13:52:30,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-21 13:52:30,740 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 26 treesize of output 24 [2022-11-21 13:52:30,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:30,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-21 13:52:30,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:30,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:52:30,877 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:52:30,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1792763005] [2022-11-21 13:52:30,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1792763005] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:52:30,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:52:30,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:52:30,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112764812] [2022-11-21 13:52:30,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:52:30,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:52:30,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:52:30,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:52:30,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:52:30,878 INFO L87 Difference]: Start difference. First operand 839 states and 2804 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) [2022-11-21 13:52:31,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:31,147 INFO L93 Difference]: Finished difference Result 786 states and 2642 transitions. [2022-11-21 13:52:31,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:52:31,148 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 [2022-11-21 13:52:31,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:31,154 INFO L225 Difference]: With dead ends: 786 [2022-11-21 13:52:31,154 INFO L226 Difference]: Without dead ends: 786 [2022-11-21 13:52:31,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:52:31,155 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:31,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 3 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 13:52:31,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2022-11-21 13:52:31,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 786. [2022-11-21 13:52:31,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 703 states have (on average 3.7581792318634424) internal successors, (2642), 785 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:31,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 2642 transitions. [2022-11-21 13:52:31,191 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 2642 transitions. Word has length 5 [2022-11-21 13:52:31,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:31,191 INFO L495 AbstractCegarLoop]: Abstraction has 786 states and 2642 transitions. [2022-11-21 13:52:31,192 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) [2022-11-21 13:52:31,192 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 2642 transitions. [2022-11-21 13:52:31,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-21 13:52:31,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:31,192 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-21 13:52:31,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:52:31,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:52:31,399 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:52:31,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:31,400 INFO L85 PathProgramCache]: Analyzing trace with hash -2076150991, now seen corresponding path program 1 times [2022-11-21 13:52:31,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:52:31,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1914364817] [2022-11-21 13:52:31,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:31,400 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 [2022-11-21 13:52:31,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:52:31,401 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:52:31,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:52:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:31,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 13:52:31,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:52:31,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:31,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:52:31,569 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:52:31,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1914364817] [2022-11-21 13:52:31,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1914364817] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:52:31,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:52:31,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:52:31,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296916869] [2022-11-21 13:52:31,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:52:31,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:52:31,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:52:31,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:52:31,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:52:31,570 INFO L87 Difference]: Start difference. First operand 786 states and 2642 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:32,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:32,211 INFO L93 Difference]: Finished difference Result 1300 states and 4228 transitions. [2022-11-21 13:52:32,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 13:52:32,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-21 13:52:32,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:32,226 INFO L225 Difference]: With dead ends: 1300 [2022-11-21 13:52:32,231 INFO L226 Difference]: Without dead ends: 1300 [2022-11-21 13:52:32,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:52:32,233 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 89 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:32,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 13 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-21 13:52:32,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-11-21 13:52:32,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1048. [2022-11-21 13:52:32,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 965 states have (on average 3.6766839378238343) internal successors, (3548), 1047 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:32,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 3548 transitions. [2022-11-21 13:52:32,285 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 3548 transitions. Word has length 6 [2022-11-21 13:52:32,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:32,285 INFO L495 AbstractCegarLoop]: Abstraction has 1048 states and 3548 transitions. [2022-11-21 13:52:32,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:32,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 3548 transitions. [2022-11-21 13:52:32,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-21 13:52:32,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:32,287 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-21 13:52:32,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-21 13:52:32,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:52:32,499 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:52:32,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:32,500 INFO L85 PathProgramCache]: Analyzing trace with hash -2123079528, now seen corresponding path program 2 times [2022-11-21 13:52:32,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:52:32,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441357715] [2022-11-21 13:52:32,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:52:32,500 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 [2022-11-21 13:52:32,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:52:32,501 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:52:32,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:52:32,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 13:52:32,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:52:32,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 13:52:32,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:52:32,762 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 13:52:32,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-21 13:52:32,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:32,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:52:33,881 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:33,881 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:52:33,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441357715] [2022-11-21 13:52:33,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [441357715] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:52:33,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:52:33,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-21 13:52:33,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457665744] [2022-11-21 13:52:33,882 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:52:33,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 13:52:33,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:52:33,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 13:52:33,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-21 13:52:33,883 INFO L87 Difference]: Start difference. First operand 1048 states and 3548 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) [2022-11-21 13:52:37,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 13:52:40,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 13:52:42,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 13:52:44,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 13:52:46,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 13:52:51,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:51,564 INFO L93 Difference]: Finished difference Result 7498 states and 25206 transitions. [2022-11-21 13:52:51,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-21 13:52:51,566 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 [2022-11-21 13:52:51,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:51,608 INFO L225 Difference]: With dead ends: 7498 [2022-11-21 13:52:51,608 INFO L226 Difference]: Without dead ends: 7498 [2022-11-21 13:52:51,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2022-11-21 13:52:51,609 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1354 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 101 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1354 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:51,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1354 Valid, 102 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1256 Invalid, 2 Unknown, 0 Unchecked, 15.8s Time] [2022-11-21 13:52:51,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7498 states. [2022-11-21 13:52:51,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7498 to 1060. [2022-11-21 13:52:51,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 977 states have (on average 3.6581371545547596) internal successors, (3574), 1059 states have internal predecessors, (3574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:51,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 3574 transitions. [2022-11-21 13:52:51,733 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 3574 transitions. Word has length 6 [2022-11-21 13:52:51,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:51,733 INFO L495 AbstractCegarLoop]: Abstraction has 1060 states and 3574 transitions. [2022-11-21 13:52:51,733 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) [2022-11-21 13:52:51,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 3574 transitions. [2022-11-21 13:52:51,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-21 13:52:51,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:51,734 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:52:51,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-11-21 13:52:51,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:52:51,947 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:52:51,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:51,947 INFO L85 PathProgramCache]: Analyzing trace with hash 64050138, now seen corresponding path program 1 times [2022-11-21 13:52:51,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:52:51,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1767137843] [2022-11-21 13:52:51,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:51,948 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 [2022-11-21 13:52:51,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:52:51,949 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:52:51,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:52:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:52,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 13:52:52,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:52:52,113 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-21 13:52:52,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-21 13:52:52,152 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-21 13:52:52,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-21 13:52:52,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:52,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:52:52,171 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:52:52,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1767137843] [2022-11-21 13:52:52,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1767137843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:52:52,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:52:52,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 13:52:52,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789022444] [2022-11-21 13:52:52,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:52:52,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:52:52,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:52:52,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:52:52,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:52:52,173 INFO L87 Difference]: Start difference. First operand 1060 states and 3574 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) [2022-11-21 13:52:52,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:52,360 INFO L93 Difference]: Finished difference Result 998 states and 3393 transitions. [2022-11-21 13:52:52,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:52:52,361 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 [2022-11-21 13:52:52,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:52,365 INFO L225 Difference]: With dead ends: 998 [2022-11-21 13:52:52,366 INFO L226 Difference]: Without dead ends: 998 [2022-11-21 13:52:52,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:52:52,367 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:52,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 3 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 13:52:52,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-11-21 13:52:52,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 998. [2022-11-21 13:52:52,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 933 states have (on average 3.6366559485530545) internal successors, (3393), 997 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:52,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 3393 transitions. [2022-11-21 13:52:52,437 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 3393 transitions. Word has length 7 [2022-11-21 13:52:52,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:52,438 INFO L495 AbstractCegarLoop]: Abstraction has 998 states and 3393 transitions. [2022-11-21 13:52:52,439 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) [2022-11-21 13:52:52,439 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 3393 transitions. [2022-11-21 13:52:52,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-21 13:52:52,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:52,440 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:52:52,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:52:52,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:52:52,652 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:52:52,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:52,653 INFO L85 PathProgramCache]: Analyzing trace with hash 64050139, now seen corresponding path program 1 times [2022-11-21 13:52:52,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:52:52,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [331217382] [2022-11-21 13:52:52,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:52,653 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 [2022-11-21 13:52:52,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:52:52,656 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:52:52,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:52:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:52,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 13:52:52,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:52:52,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:52,934 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-21 13:52:52,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-21 13:52:52,956 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 84 treesize of output 82 [2022-11-21 13:52:53,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:53,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-21 13:52:53,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:53,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:52:53,127 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:52:53,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [331217382] [2022-11-21 13:52:53,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [331217382] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:52:53,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:52:53,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:52:53,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712956305] [2022-11-21 13:52:53,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:52:53,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:52:53,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:52:53,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:52:53,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:52:53,129 INFO L87 Difference]: Start difference. First operand 998 states and 3393 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:53,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:53,384 INFO L93 Difference]: Finished difference Result 936 states and 3212 transitions. [2022-11-21 13:52:53,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:52:53,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-21 13:52:53,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:53,389 INFO L225 Difference]: With dead ends: 936 [2022-11-21 13:52:53,389 INFO L226 Difference]: Without dead ends: 936 [2022-11-21 13:52:53,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:52:53,390 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 70 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:53,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 3 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 13:52:53,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-11-21 13:52:53,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 936. [2022-11-21 13:52:53,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 889 states have (on average 3.613048368953881) internal successors, (3212), 935 states have internal predecessors, (3212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:53,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 3212 transitions. [2022-11-21 13:52:53,418 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 3212 transitions. Word has length 7 [2022-11-21 13:52:53,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:53,418 INFO L495 AbstractCegarLoop]: Abstraction has 936 states and 3212 transitions. [2022-11-21 13:52:53,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:53,419 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 3212 transitions. [2022-11-21 13:52:53,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-21 13:52:53,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:53,419 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:52:53,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:52:53,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:52:53,636 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:52:53,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:53,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1985548307, now seen corresponding path program 1 times [2022-11-21 13:52:53,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:52:53,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1376767534] [2022-11-21 13:52:53,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:53,637 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 [2022-11-21 13:52:53,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:52:53,638 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:52:53,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:52:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:53,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 13:52:53,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:52:53,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:52:53,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:52:53,806 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:52:53,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1376767534] [2022-11-21 13:52:53,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1376767534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:52:53,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:52:53,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:52:53,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492365990] [2022-11-21 13:52:53,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:52:53,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:52:53,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:52:53,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:52:53,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:52:53,809 INFO L87 Difference]: Start difference. First operand 936 states and 3212 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:54,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:52:54,336 INFO L93 Difference]: Finished difference Result 890 states and 2910 transitions. [2022-11-21 13:52:54,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 13:52:54,336 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-21 13:52:54,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:52:54,340 INFO L225 Difference]: With dead ends: 890 [2022-11-21 13:52:54,340 INFO L226 Difference]: Without dead ends: 890 [2022-11-21 13:52:54,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:52:54,341 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 59 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 13:52:54,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 13 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 13:52:54,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2022-11-21 13:52:54,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 850. [2022-11-21 13:52:54,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 803 states have (on average 3.5292652552926524) internal successors, (2834), 849 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:54,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2834 transitions. [2022-11-21 13:52:54,367 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2834 transitions. Word has length 8 [2022-11-21 13:52:54,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:52:54,368 INFO L495 AbstractCegarLoop]: Abstraction has 850 states and 2834 transitions. [2022-11-21 13:52:54,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:52:54,368 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2834 transitions. [2022-11-21 13:52:54,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-21 13:52:54,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:52:54,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:52:54,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:52:54,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:52:54,580 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:52:54,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:52:54,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1270726966, now seen corresponding path program 1 times [2022-11-21 13:52:54,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:52:54,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2101349078] [2022-11-21 13:52:54,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:52:54,581 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 [2022-11-21 13:52:54,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:52:54,583 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:52:54,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:52:54,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:52:54,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 13:52:54,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:52:54,891 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 13:52:54,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-21 13:52:55,050 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-21 13:52:55,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-21 13:52:55,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:52:55,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-21 13:52:55,223 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 13:52:55,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-21 13:52:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:52:55,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:52:59,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:52:59,913 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:52:59,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2101349078] [2022-11-21 13:52:59,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2101349078] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:52:59,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:52:59,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-21 13:52:59,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387592865] [2022-11-21 13:52:59,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:52:59,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 13:52:59,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:52:59,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 13:52:59,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-21 13:52:59,915 INFO L87 Difference]: Start difference. First operand 850 states and 2834 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) [2022-11-21 13:53:07,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:53:07,729 INFO L93 Difference]: Finished difference Result 9440 states and 32062 transitions. [2022-11-21 13:53:07,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-21 13:53:07,730 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 [2022-11-21 13:53:07,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:53:07,799 INFO L225 Difference]: With dead ends: 9440 [2022-11-21 13:53:07,800 INFO L226 Difference]: Without dead ends: 9440 [2022-11-21 13:53:07,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2022-11-21 13:53:07,801 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1074 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1074 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-21 13:53:07,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1074 Valid, 66 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-21 13:53:07,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9440 states. [2022-11-21 13:53:07,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9440 to 1090. [2022-11-21 13:53:07,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1043 states have (on average 3.735378715244487) internal successors, (3896), 1089 states have internal predecessors, (3896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:07,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 3896 transitions. [2022-11-21 13:53:07,908 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 3896 transitions. Word has length 8 [2022-11-21 13:53:07,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:53:07,909 INFO L495 AbstractCegarLoop]: Abstraction has 1090 states and 3896 transitions. [2022-11-21 13:53:07,909 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) [2022-11-21 13:53:07,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 3896 transitions. [2022-11-21 13:53:07,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-21 13:53:07,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:53:07,910 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:53:07,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:53:08,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:53:08,122 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:53:08,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:53:08,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1270726968, now seen corresponding path program 1 times [2022-11-21 13:53:08,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:53:08,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [936658066] [2022-11-21 13:53:08,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:53:08,123 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 [2022-11-21 13:53:08,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:53:08,125 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:53:08,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:53:08,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:53:08,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 13:53:08,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:53:08,393 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-21 13:53:08,393 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-21 13:53:08,433 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-21 13:53:08,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-21 13:53:08,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 13:53:08,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:53:08,453 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:53:08,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [936658066] [2022-11-21 13:53:08,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [936658066] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:53:08,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:53:08,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:53:08,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712826312] [2022-11-21 13:53:08,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:53:08,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:53:08,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:53:08,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:53:08,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:53:08,455 INFO L87 Difference]: Start difference. First operand 1090 states and 3896 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) [2022-11-21 13:53:08,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:53:08,679 INFO L93 Difference]: Finished difference Result 880 states and 3026 transitions. [2022-11-21 13:53:08,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 13:53:08,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-21 13:53:08,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:53:08,683 INFO L225 Difference]: With dead ends: 880 [2022-11-21 13:53:08,683 INFO L226 Difference]: Without dead ends: 880 [2022-11-21 13:53:08,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:53:08,684 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 63 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 3 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 [2022-11-21 13:53:08,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 3 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 13:53:08,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-11-21 13:53:08,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 880. [2022-11-21 13:53:08,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 854 states have (on average 3.5433255269320845) internal successors, (3026), 879 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:08,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3026 transitions. [2022-11-21 13:53:08,711 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3026 transitions. Word has length 8 [2022-11-21 13:53:08,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:53:08,711 INFO L495 AbstractCegarLoop]: Abstraction has 880 states and 3026 transitions. [2022-11-21 13:53:08,711 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) [2022-11-21 13:53:08,712 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3026 transitions. [2022-11-21 13:53:08,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-21 13:53:08,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:53:08,712 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:53:08,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:53:08,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:53:08,926 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:53:08,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:53:08,927 INFO L85 PathProgramCache]: Analyzing trace with hash 737836580, now seen corresponding path program 1 times [2022-11-21 13:53:08,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:53:08,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [806117449] [2022-11-21 13:53:08,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:53:08,927 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 [2022-11-21 13:53:08,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:53:08,928 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:53:08,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:53:09,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:53:09,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 13:53:09,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:53:09,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:53:09,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:53:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:53:09,396 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:53:09,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [806117449] [2022-11-21 13:53:09,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [806117449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:53:09,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:53:09,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-21 13:53:09,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271965743] [2022-11-21 13:53:09,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:53:09,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 13:53:09,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:53:09,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 13:53:09,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-21 13:53:09,398 INFO L87 Difference]: Start difference. First operand 880 states and 3026 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 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) [2022-11-21 13:53:11,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:53:11,599 INFO L93 Difference]: Finished difference Result 1722 states and 5778 transitions. [2022-11-21 13:53:11,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 13:53:11,600 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 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 [2022-11-21 13:53:11,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:53:11,606 INFO L225 Difference]: With dead ends: 1722 [2022-11-21 13:53:11,606 INFO L226 Difference]: Without dead ends: 1722 [2022-11-21 13:53:11,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-11-21 13:53:11,607 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 331 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-21 13:53:11,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 69 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-21 13:53:11,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2022-11-21 13:53:11,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1370. [2022-11-21 13:53:11,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1344 states have (on average 3.619047619047619) internal successors, (4864), 1369 states have internal predecessors, (4864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:11,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 4864 transitions. [2022-11-21 13:53:11,661 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 4864 transitions. Word has length 9 [2022-11-21 13:53:11,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:53:11,662 INFO L495 AbstractCegarLoop]: Abstraction has 1370 states and 4864 transitions. [2022-11-21 13:53:11,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 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) [2022-11-21 13:53:11,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 4864 transitions. [2022-11-21 13:53:11,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-21 13:53:11,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:53:11,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:53:11,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:53:11,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:53:11,876 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:53:11,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:53:11,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1152697721, now seen corresponding path program 1 times [2022-11-21 13:53:11,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:53:11,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441291117] [2022-11-21 13:53:11,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:53:11,878 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 [2022-11-21 13:53:11,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:53:11,879 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:53:11,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:53:11,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:53:11,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 13:53:11,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:53:12,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:53:12,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:53:12,022 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:53:12,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441291117] [2022-11-21 13:53:12,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441291117] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:53:12,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:53:12,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:53:12,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219679245] [2022-11-21 13:53:12,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:53:12,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:53:12,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:53:12,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:53:12,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:53:12,024 INFO L87 Difference]: Start difference. First operand 1370 states and 4864 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:12,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:53:12,389 INFO L93 Difference]: Finished difference Result 1816 states and 6396 transitions. [2022-11-21 13:53:12,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 13:53:12,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-21 13:53:12,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:53:12,394 INFO L225 Difference]: With dead ends: 1816 [2022-11-21 13:53:12,394 INFO L226 Difference]: Without dead ends: 1816 [2022-11-21 13:53:12,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:53:12,395 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 43 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 13:53:12,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 9 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 13:53:12,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2022-11-21 13:53:12,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1668. [2022-11-21 13:53:12,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1668 states, 1642 states have (on average 3.6626065773447016) internal successors, (6014), 1667 states have internal predecessors, (6014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:12,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1668 states to 1668 states and 6014 transitions. [2022-11-21 13:53:12,469 INFO L78 Accepts]: Start accepts. Automaton has 1668 states and 6014 transitions. Word has length 10 [2022-11-21 13:53:12,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:53:12,470 INFO L495 AbstractCegarLoop]: Abstraction has 1668 states and 6014 transitions. [2022-11-21 13:53:12,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:12,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1668 states and 6014 transitions. [2022-11-21 13:53:12,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-21 13:53:12,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:53:12,473 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:53:12,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:53:12,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:53:12,687 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:53:12,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:53:12,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1404760281, now seen corresponding path program 1 times [2022-11-21 13:53:12,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:53:12,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [934022022] [2022-11-21 13:53:12,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:53:12,688 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 [2022-11-21 13:53:12,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:53:12,689 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:53:12,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:53:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:53:12,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 13:53:12,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:53:13,011 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 13:53:13,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-21 13:53:13,153 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-21 13:53:13,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-21 13:53:13,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:53:13,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-21 13:53:13,336 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 13:53:13,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-21 13:53:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:53:13,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:53:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:53:14,099 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:53:14,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [934022022] [2022-11-21 13:53:14,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [934022022] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:53:14,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:53:14,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-21 13:53:14,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793451257] [2022-11-21 13:53:14,100 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:53:14,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 13:53:14,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:53:14,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 13:53:14,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-21 13:53:14,101 INFO L87 Difference]: Start difference. First operand 1668 states and 6014 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) [2022-11-21 13:53:27,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:53:27,458 INFO L93 Difference]: Finished difference Result 5137 states and 17329 transitions. [2022-11-21 13:53:27,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-21 13:53:27,459 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 [2022-11-21 13:53:27,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:53:27,471 INFO L225 Difference]: With dead ends: 5137 [2022-11-21 13:53:27,471 INFO L226 Difference]: Without dead ends: 5137 [2022-11-21 13:53:27,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2022-11-21 13:53:27,472 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 737 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-21 13:53:27,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [737 Valid, 60 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-21 13:53:27,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5137 states. [2022-11-21 13:53:27,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5137 to 1736. [2022-11-21 13:53:27,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1710 states have (on average 3.712280701754386) internal successors, (6348), 1735 states have internal predecessors, (6348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:27,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 6348 transitions. [2022-11-21 13:53:27,539 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 6348 transitions. Word has length 10 [2022-11-21 13:53:27,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:53:27,539 INFO L495 AbstractCegarLoop]: Abstraction has 1736 states and 6348 transitions. [2022-11-21 13:53:27,539 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) [2022-11-21 13:53:27,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 6348 transitions. [2022-11-21 13:53:27,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-21 13:53:27,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:53:27,540 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:53:27,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:53:27,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:53:27,754 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:53:27,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:53:27,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1404760282, now seen corresponding path program 1 times [2022-11-21 13:53:27,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:53:27,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [361693464] [2022-11-21 13:53:27,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:53:27,755 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 [2022-11-21 13:53:27,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:53:27,756 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:53:27,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:53:27,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:53:27,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 13:53:27,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:53:27,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-21 13:53:27,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 13:53:27,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:53:27,933 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:53:27,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [361693464] [2022-11-21 13:53:27,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [361693464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:53:27,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:53:27,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:53:27,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690057019] [2022-11-21 13:53:27,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:53:27,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:53:27,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:53:27,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:53:27,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:53:27,936 INFO L87 Difference]: Start difference. First operand 1736 states and 6348 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:28,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:53:28,149 INFO L93 Difference]: Finished difference Result 1378 states and 4979 transitions. [2022-11-21 13:53:28,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 13:53:28,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-21 13:53:28,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:53:28,153 INFO L225 Difference]: With dead ends: 1378 [2022-11-21 13:53:28,153 INFO L226 Difference]: Without dead ends: 1378 [2022-11-21 13:53:28,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:53:28,154 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 56 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:53:28,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 3 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 13:53:28,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2022-11-21 13:53:28,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1378. [2022-11-21 13:53:28,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1364 states have (on average 3.650293255131965) internal successors, (4979), 1377 states have internal predecessors, (4979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:28,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 4979 transitions. [2022-11-21 13:53:28,190 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 4979 transitions. Word has length 10 [2022-11-21 13:53:28,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:53:28,190 INFO L495 AbstractCegarLoop]: Abstraction has 1378 states and 4979 transitions. [2022-11-21 13:53:28,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:28,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 4979 transitions. [2022-11-21 13:53:28,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-21 13:53:28,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:53:28,191 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:53:28,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:53:28,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:53:28,403 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:53:28,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:53:28,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1404760283, now seen corresponding path program 1 times [2022-11-21 13:53:28,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:53:28,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [672199489] [2022-11-21 13:53:28,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:53:28,404 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 [2022-11-21 13:53:28,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:53:28,405 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:53:28,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:53:28,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:53:28,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 13:53:28,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:53:28,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:53:28,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:53:28,867 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 [2022-11-21 13:53:28,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:53:28,947 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:53:28,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [672199489] [2022-11-21 13:53:28,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [672199489] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:53:28,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:53:28,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-21 13:53:28,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938337348] [2022-11-21 13:53:28,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:53:28,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 13:53:28,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:53:28,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 13:53:28,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-21 13:53:28,949 INFO L87 Difference]: Start difference. First operand 1378 states and 4979 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 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) [2022-11-21 13:53:30,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:53:30,783 INFO L93 Difference]: Finished difference Result 1756 states and 5807 transitions. [2022-11-21 13:53:30,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 13:53:30,784 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 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 10 [2022-11-21 13:53:30,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:53:30,788 INFO L225 Difference]: With dead ends: 1756 [2022-11-21 13:53:30,788 INFO L226 Difference]: Without dead ends: 1756 [2022-11-21 13:53:30,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2022-11-21 13:53:30,789 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 458 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-21 13:53:30,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 30 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-21 13:53:30,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2022-11-21 13:53:30,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1324. [2022-11-21 13:53:30,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1310 states have (on average 3.616793893129771) internal successors, (4738), 1323 states have internal predecessors, (4738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:30,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 4738 transitions. [2022-11-21 13:53:30,825 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 4738 transitions. Word has length 10 [2022-11-21 13:53:30,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:53:30,826 INFO L495 AbstractCegarLoop]: Abstraction has 1324 states and 4738 transitions. [2022-11-21 13:53:30,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 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) [2022-11-21 13:53:30,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 4738 transitions. [2022-11-21 13:53:30,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-21 13:53:30,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:53:30,827 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:53:30,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:53:31,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:53:31,039 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:53:31,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:53:31,040 INFO L85 PathProgramCache]: Analyzing trace with hash 2040692137, now seen corresponding path program 2 times [2022-11-21 13:53:31,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:53:31,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235232770] [2022-11-21 13:53:31,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:53:31,040 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 [2022-11-21 13:53:31,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:53:31,042 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:53:31,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:53:31,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 13:53:31,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:53:31,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 13:53:31,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:53:31,348 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-21 13:53:31,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-21 13:53:31,486 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-21 13:53:31,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-21 13:53:31,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:53:31,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-21 13:53:31,623 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 13:53:31,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-21 13:53:31,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 13:53:31,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:53:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 13:53:32,739 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:53:32,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235232770] [2022-11-21 13:53:32,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235232770] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:53:32,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:53:32,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-21 13:53:32,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270363511] [2022-11-21 13:53:32,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:53:32,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 13:53:32,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:53:32,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 13:53:32,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-21 13:53:32,741 INFO L87 Difference]: Start difference. First operand 1324 states and 4738 transitions. Second operand has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 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) [2022-11-21 13:53:36,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:53:36,189 INFO L93 Difference]: Finished difference Result 2764 states and 9214 transitions. [2022-11-21 13:53:36,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 13:53:36,191 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 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 11 [2022-11-21 13:53:36,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:53:36,197 INFO L225 Difference]: With dead ends: 2764 [2022-11-21 13:53:36,197 INFO L226 Difference]: Without dead ends: 2764 [2022-11-21 13:53:36,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2022-11-21 13:53:36,198 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 522 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:53:36,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 123 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-21 13:53:36,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2022-11-21 13:53:36,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 1246. [2022-11-21 13:53:36,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1232 states have (on average 3.668831168831169) internal successors, (4520), 1245 states have internal predecessors, (4520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:36,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4520 transitions. [2022-11-21 13:53:36,241 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4520 transitions. Word has length 11 [2022-11-21 13:53:36,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:53:36,242 INFO L495 AbstractCegarLoop]: Abstraction has 1246 states and 4520 transitions. [2022-11-21 13:53:36,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 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) [2022-11-21 13:53:36,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4520 transitions. [2022-11-21 13:53:36,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-21 13:53:36,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:53:36,243 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:53:36,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:53:36,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:53:36,445 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:53:36,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:53:36,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1354924344, now seen corresponding path program 1 times [2022-11-21 13:53:36,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:53:36,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1719730659] [2022-11-21 13:53:36,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:53:36,447 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 [2022-11-21 13:53:36,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:53:36,448 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:53:36,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:53:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:53:36,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 13:53:36,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:53:36,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:53:36,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:53:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:53:36,947 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:53:36,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1719730659] [2022-11-21 13:53:36,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1719730659] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:53:36,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:53:36,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-21 13:53:36,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228648413] [2022-11-21 13:53:36,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:53:36,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 13:53:36,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:53:36,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 13:53:36,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-21 13:53:36,949 INFO L87 Difference]: Start difference. First operand 1246 states and 4520 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2022-11-21 13:53:38,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:53:38,736 INFO L93 Difference]: Finished difference Result 1306 states and 4435 transitions. [2022-11-21 13:53:38,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 13:53:38,737 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 [2022-11-21 13:53:38,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:53:38,740 INFO L225 Difference]: With dead ends: 1306 [2022-11-21 13:53:38,740 INFO L226 Difference]: Without dead ends: 1306 [2022-11-21 13:53:38,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-11-21 13:53:38,741 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 252 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-21 13:53:38,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 79 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-21 13:53:38,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2022-11-21 13:53:38,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 1228. [2022-11-21 13:53:38,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1214 states have (on average 3.5378912685337727) internal successors, (4295), 1227 states have internal predecessors, (4295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:38,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 4295 transitions. [2022-11-21 13:53:38,772 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 4295 transitions. Word has length 12 [2022-11-21 13:53:38,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:53:38,772 INFO L495 AbstractCegarLoop]: Abstraction has 1228 states and 4295 transitions. [2022-11-21 13:53:38,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2022-11-21 13:53:38,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 4295 transitions. [2022-11-21 13:53:38,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-21 13:53:38,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:53:38,774 INFO L195 NwaCegarLoop]: trace histogram [7, 2, 1, 1, 1] [2022-11-21 13:53:38,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:53:38,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:53:38,986 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:53:38,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:53:38,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1619971240, now seen corresponding path program 1 times [2022-11-21 13:53:38,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:53:38,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [391418460] [2022-11-21 13:53:38,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:53:38,987 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 [2022-11-21 13:53:38,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:53:38,988 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:53:38,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:53:39,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:53:39,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 13:53:39,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:53:39,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 13:53:39,435 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 13:53:39,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:53:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:53:41,238 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:53:41,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [391418460] [2022-11-21 13:53:41,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [391418460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:53:41,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:53:41,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 19 [2022-11-21 13:53:41,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265939273] [2022-11-21 13:53:41,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:53:41,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-21 13:53:41,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:53:41,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-21 13:53:41,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-11-21 13:53:41,240 INFO L87 Difference]: Start difference. First operand 1228 states and 4295 transitions. Second operand has 20 states, 20 states have (on average 1.1) internal successors, (22), 19 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) [2022-11-21 13:53:57,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:53:57,520 INFO L93 Difference]: Finished difference Result 8015 states and 28688 transitions. [2022-11-21 13:53:57,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-21 13:53:57,521 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.1) internal successors, (22), 19 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 12 [2022-11-21 13:53:57,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:53:57,540 INFO L225 Difference]: With dead ends: 8015 [2022-11-21 13:53:57,540 INFO L226 Difference]: Without dead ends: 8015 [2022-11-21 13:53:57,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2022-11-21 13:53:57,542 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1390 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 2502 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1390 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 2552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:53:57,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1390 Valid, 282 Invalid, 2552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 2502 Invalid, 0 Unknown, 0 Unchecked, 14.2s Time] [2022-11-21 13:53:57,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8015 states. [2022-11-21 13:53:57,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8015 to 1231. [2022-11-21 13:53:57,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1217 states have (on average 3.532456861133936) internal successors, (4299), 1230 states have internal predecessors, (4299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:57,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 4299 transitions. [2022-11-21 13:53:57,641 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 4299 transitions. Word has length 12 [2022-11-21 13:53:57,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:53:57,641 INFO L495 AbstractCegarLoop]: Abstraction has 1231 states and 4299 transitions. [2022-11-21 13:53:57,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.1) internal successors, (22), 19 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) [2022-11-21 13:53:57,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 4299 transitions. [2022-11-21 13:53:57,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-21 13:53:57,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:53:57,642 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-21 13:53:57,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-21 13:53:57,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:53:57,852 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:53:57,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:53:57,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1163046895, now seen corresponding path program 3 times [2022-11-21 13:53:57,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:53:57,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715122045] [2022-11-21 13:53:57,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 13:53:57,853 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 [2022-11-21 13:53:57,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:53:57,854 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:53:57,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:53:58,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-21 13:53:58,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:53:58,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 13:53:58,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:53:58,185 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 13:53:58,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-21 13:53:58,334 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-21 13:53:58,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-21 13:53:58,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:53:58,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-21 13:53:58,443 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 13:53:58,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-21 13:53:58,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 13:53:58,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:53:59,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 13:53:59,779 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:53:59,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715122045] [2022-11-21 13:53:59,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715122045] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:53:59,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:53:59,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-21 13:53:59,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115563273] [2022-11-21 13:53:59,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:53:59,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 13:53:59,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:53:59,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 13:53:59,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-21 13:53:59,780 INFO L87 Difference]: Start difference. First operand 1231 states and 4299 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) [2022-11-21 13:54:03,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:54:03,559 INFO L93 Difference]: Finished difference Result 2775 states and 9471 transitions. [2022-11-21 13:54:03,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 13:54:03,560 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 12 [2022-11-21 13:54:03,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:54:03,566 INFO L225 Difference]: With dead ends: 2775 [2022-11-21 13:54:03,567 INFO L226 Difference]: Without dead ends: 2775 [2022-11-21 13:54:03,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2022-11-21 13:54:03,567 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 492 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:54:03,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 35 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-21 13:54:03,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2022-11-21 13:54:03,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 1687. [2022-11-21 13:54:03,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1673 states have (on average 3.8200836820083683) internal successors, (6391), 1686 states have internal predecessors, (6391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:54:03,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 6391 transitions. [2022-11-21 13:54:03,603 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 6391 transitions. Word has length 12 [2022-11-21 13:54:03,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:54:03,603 INFO L495 AbstractCegarLoop]: Abstraction has 1687 states and 6391 transitions. [2022-11-21 13:54:03,603 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) [2022-11-21 13:54:03,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 6391 transitions. [2022-11-21 13:54:03,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-21 13:54:03,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:54:03,604 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-21 13:54:03,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:54:03,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:54:03,819 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:54:03,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:54:03,820 INFO L85 PathProgramCache]: Analyzing trace with hash 389165176, now seen corresponding path program 3 times [2022-11-21 13:54:03,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:54:03,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1374677312] [2022-11-21 13:54:03,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 13:54:03,820 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 [2022-11-21 13:54:03,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:54:03,821 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:54:03,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:54:04,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-21 13:54:04,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:54:04,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 13:54:04,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:54:04,238 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 13:54:04,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-21 13:54:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:54:04,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:54:07,674 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:54:07,674 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:54:07,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1374677312] [2022-11-21 13:54:07,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1374677312] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:54:07,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:54:07,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-21 13:54:07,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638042489] [2022-11-21 13:54:07,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:54:07,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 13:54:07,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:54:07,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 13:54:07,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-21 13:54:07,676 INFO L87 Difference]: Start difference. First operand 1687 states and 6391 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) [2022-11-21 13:54:22,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 13:54:24,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 13:54:26,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 13:54:28,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 13:54:30,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 13:54:32,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 13:54:34,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 13:54:36,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 13:54:38,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 13:54:40,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 13:54:48,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:54:48,660 INFO L93 Difference]: Finished difference Result 14223 states and 57504 transitions. [2022-11-21 13:54:48,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-21 13:54:48,662 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 [2022-11-21 13:54:48,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:54:48,749 INFO L225 Difference]: With dead ends: 14223 [2022-11-21 13:54:48,749 INFO L226 Difference]: Without dead ends: 14223 [2022-11-21 13:54:48,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 13:54:48,751 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1872 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 3709 mSolverCounterSat, 248 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1872 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 3966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 3709 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:54:48,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1872 Valid, 393 Invalid, 3966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 3709 Invalid, 9 Unknown, 0 Unchecked, 28.0s Time] [2022-11-21 13:54:48,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14223 states. [2022-11-21 13:54:48,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14223 to 1705. [2022-11-21 13:54:48,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1691 states have (on average 3.798935541099941) internal successors, (6424), 1704 states have internal predecessors, (6424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:54:48,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 6424 transitions. [2022-11-21 13:54:48,961 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 6424 transitions. Word has length 12 [2022-11-21 13:54:48,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:54:48,961 INFO L495 AbstractCegarLoop]: Abstraction has 1705 states and 6424 transitions. [2022-11-21 13:54:48,961 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) [2022-11-21 13:54:48,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 6424 transitions. [2022-11-21 13:54:48,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 13:54:48,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:54:48,963 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:54:48,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:54:49,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:54:49,176 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:54:49,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:54:49,177 INFO L85 PathProgramCache]: Analyzing trace with hash 547825102, now seen corresponding path program 2 times [2022-11-21 13:54:49,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:54:49,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623325122] [2022-11-21 13:54:49,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:54:49,177 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 [2022-11-21 13:54:49,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:54:49,178 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:54:49,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:54:49,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 13:54:49,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:54:49,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-21 13:54:49,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:54:49,502 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 13:54:49,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-21 13:54:49,654 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-21 13:54:49,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-21 13:54:49,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:54:49,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-21 13:54:49,803 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 13:54:49,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-21 13:54:49,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-21 13:54:49,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:54:49,905 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:54:49,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623325122] [2022-11-21 13:54:49,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1623325122] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:54:49,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:54:49,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:54:49,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799385935] [2022-11-21 13:54:49,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:54:49,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:54:49,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:54:49,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:54:49,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:54:49,907 INFO L87 Difference]: Start difference. First operand 1705 states and 6424 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:54:50,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:54:50,279 INFO L93 Difference]: Finished difference Result 1673 states and 6166 transitions. [2022-11-21 13:54:50,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 13:54:50,280 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-21 13:54:50,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:54:50,284 INFO L225 Difference]: With dead ends: 1673 [2022-11-21 13:54:50,284 INFO L226 Difference]: Without dead ends: 1673 [2022-11-21 13:54:50,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:54:50,285 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 84 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 13:54:50,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 7 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 13:54:50,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1673 states. [2022-11-21 13:54:50,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1673 to 1325. [2022-11-21 13:54:50,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1311 states have (on average 3.772692601067887) internal successors, (4946), 1324 states have internal predecessors, (4946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:54:50,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 4946 transitions. [2022-11-21 13:54:50,316 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 4946 transitions. Word has length 13 [2022-11-21 13:54:50,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:54:50,316 INFO L495 AbstractCegarLoop]: Abstraction has 1325 states and 4946 transitions. [2022-11-21 13:54:50,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:54:50,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 4946 transitions. [2022-11-21 13:54:50,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-21 13:54:50,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:54:50,317 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:54:50,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:54:50,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:54:50,519 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:54:50,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:54:50,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1105368979, now seen corresponding path program 2 times [2022-11-21 13:54:50,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:54:50,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039292124] [2022-11-21 13:54:50,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:54:50,520 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 [2022-11-21 13:54:50,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:54:50,522 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:54:50,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:54:50,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 13:54:50,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:54:50,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 13:54:50,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:54:50,880 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-21 13:54:50,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-21 13:54:51,032 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-21 13:54:51,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-21 13:54:51,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:54:51,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-21 13:54:51,177 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 13:54:51,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-21 13:54:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 13:54:51,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:54:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 13:54:52,290 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:54:52,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039292124] [2022-11-21 13:54:52,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039292124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:54:52,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:54:52,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-21 13:54:52,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468238264] [2022-11-21 13:54:52,290 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:54:52,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 13:54:52,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:54:52,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 13:54:52,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-21 13:54:52,292 INFO L87 Difference]: Start difference. First operand 1325 states and 4946 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:54:56,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:54:56,019 INFO L93 Difference]: Finished difference Result 2325 states and 8324 transitions. [2022-11-21 13:54:56,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 13:54:56,020 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-21 13:54:56,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:54:56,026 INFO L225 Difference]: With dead ends: 2325 [2022-11-21 13:54:56,026 INFO L226 Difference]: Without dead ends: 2325 [2022-11-21 13:54:56,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-11-21 13:54:56,027 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 336 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-21 13:54:56,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 157 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-21 13:54:56,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2325 states. [2022-11-21 13:54:56,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2325 to 1477. [2022-11-21 13:54:56,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1463 states have (on average 3.968557758031442) internal successors, (5806), 1476 states have internal predecessors, (5806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:54:56,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 5806 transitions. [2022-11-21 13:54:56,082 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 5806 transitions. Word has length 14 [2022-11-21 13:54:56,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:54:56,082 INFO L495 AbstractCegarLoop]: Abstraction has 1477 states and 5806 transitions. [2022-11-21 13:54:56,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:54:56,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 5806 transitions. [2022-11-21 13:54:56,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-21 13:54:56,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:54:56,086 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:54:56,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:54:56,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:54:56,299 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:54:56,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:54:56,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1105368981, now seen corresponding path program 1 times [2022-11-21 13:54:56,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:54:56,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799650830] [2022-11-21 13:54:56,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:54:56,300 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 [2022-11-21 13:54:56,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:54:56,301 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:54:56,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:54:56,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:56,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 13:54:56,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:54:56,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 13:54:56,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:54:56,964 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 27 treesize of output 23 [2022-11-21 13:54:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 13:54:57,175 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:54:57,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799650830] [2022-11-21 13:54:57,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799650830] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:54:57,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:54:57,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-21 13:54:57,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31466962] [2022-11-21 13:54:57,176 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:54:57,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 13:54:57,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:54:57,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 13:54:57,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-21 13:54:57,177 INFO L87 Difference]: Start difference. First operand 1477 states and 5806 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 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) [2022-11-21 13:55:01,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:55:01,595 INFO L93 Difference]: Finished difference Result 4713 states and 18265 transitions. [2022-11-21 13:55:01,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-21 13:55:01,596 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 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 14 [2022-11-21 13:55:01,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:55:01,608 INFO L225 Difference]: With dead ends: 4713 [2022-11-21 13:55:01,608 INFO L226 Difference]: Without dead ends: 4713 [2022-11-21 13:55:01,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2022-11-21 13:55:01,608 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 900 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:55:01,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [900 Valid, 101 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-21 13:55:01,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4713 states. [2022-11-21 13:55:01,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4713 to 1477. [2022-11-21 13:55:01,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1463 states have (on average 3.8796992481203008) internal successors, (5676), 1476 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:55:01,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 5676 transitions. [2022-11-21 13:55:01,653 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 5676 transitions. Word has length 14 [2022-11-21 13:55:01,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:55:01,653 INFO L495 AbstractCegarLoop]: Abstraction has 1477 states and 5676 transitions. [2022-11-21 13:55:01,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 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) [2022-11-21 13:55:01,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 5676 transitions. [2022-11-21 13:55:01,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-21 13:55:01,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:55:01,654 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:55:01,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:55:01,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:55:01,856 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:55:01,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:55:01,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1325798855, now seen corresponding path program 1 times [2022-11-21 13:55:01,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:55:01,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [186956568] [2022-11-21 13:55:01,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:55:01,857 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:55:01,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:55:01,858 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:55:01,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:55:02,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:02,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 13:55:02,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:55:02,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 13:55:02,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:55:02,142 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:55:02,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [186956568] [2022-11-21 13:55:02,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [186956568] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:55:02,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:55:02,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 13:55:02,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638219611] [2022-11-21 13:55:02,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:55:02,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 13:55:02,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:55:02,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 13:55:02,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:55:02,143 INFO L87 Difference]: Start difference. First operand 1477 states and 5676 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:55:02,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:55:02,805 INFO L93 Difference]: Finished difference Result 2229 states and 8670 transitions. [2022-11-21 13:55:02,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 13:55:02,806 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 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 [2022-11-21 13:55:02,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:55:02,811 INFO L225 Difference]: With dead ends: 2229 [2022-11-21 13:55:02,811 INFO L226 Difference]: Without dead ends: 2229 [2022-11-21 13:55:02,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-11-21 13:55:02,812 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 146 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-21 13:55:02,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 17 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-21 13:55:02,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2022-11-21 13:55:02,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 1691. [2022-11-21 13:55:02,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1677 states have (on average 4.116279069767442) internal successors, (6903), 1690 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:55:02,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 6903 transitions. [2022-11-21 13:55:02,859 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 6903 transitions. Word has length 15 [2022-11-21 13:55:02,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:55:02,860 INFO L495 AbstractCegarLoop]: Abstraction has 1691 states and 6903 transitions. [2022-11-21 13:55:02,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:55:02,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 6903 transitions. [2022-11-21 13:55:02,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-21 13:55:02,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:55:02,862 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:55:02,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-21 13:55:03,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:55:03,074 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:55:03,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:55:03,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1322800535, now seen corresponding path program 2 times [2022-11-21 13:55:03,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:55:03,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1186115973] [2022-11-21 13:55:03,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:55:03,076 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 [2022-11-21 13:55:03,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:55:03,077 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:55:03,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:55:03,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 13:55:03,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:55:03,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 13:55:03,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:55:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 13:55:03,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:55:03,333 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:55:03,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1186115973] [2022-11-21 13:55:03,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1186115973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:55:03,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:55:03,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 13:55:03,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011410947] [2022-11-21 13:55:03,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:55:03,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 13:55:03,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:55:03,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 13:55:03,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:55:03,334 INFO L87 Difference]: Start difference. First operand 1691 states and 6903 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:55:03,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:55:03,984 INFO L93 Difference]: Finished difference Result 2241 states and 9161 transitions. [2022-11-21 13:55:03,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 13:55:03,985 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 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 [2022-11-21 13:55:03,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:55:03,991 INFO L225 Difference]: With dead ends: 2241 [2022-11-21 13:55:03,991 INFO L226 Difference]: Without dead ends: 2241 [2022-11-21 13:55:03,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-11-21 13:55:03,992 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 143 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 13:55:03,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 19 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 13:55:03,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2241 states. [2022-11-21 13:55:04,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2241 to 1691. [2022-11-21 13:55:04,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1677 states have (on average 4.116279069767442) internal successors, (6903), 1690 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:55:04,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 6903 transitions. [2022-11-21 13:55:04,029 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 6903 transitions. Word has length 15 [2022-11-21 13:55:04,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:55:04,029 INFO L495 AbstractCegarLoop]: Abstraction has 1691 states and 6903 transitions. [2022-11-21 13:55:04,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:55:04,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 6903 transitions. [2022-11-21 13:55:04,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-21 13:55:04,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:55:04,031 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:55:04,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:55:04,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:55:04,232 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:55:04,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:55:04,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1294666813, now seen corresponding path program 3 times [2022-11-21 13:55:04,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:55:04,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1327257248] [2022-11-21 13:55:04,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 13:55:04,233 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 [2022-11-21 13:55:04,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:55:04,234 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:55:04,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:55:04,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-21 13:55:04,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:55:04,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 13:55:04,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:55:04,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 13:55:04,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:55:04,485 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:55:04,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1327257248] [2022-11-21 13:55:04,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1327257248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:55:04,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:55:04,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 13:55:04,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717241350] [2022-11-21 13:55:04,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:55:04,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 13:55:04,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:55:04,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 13:55:04,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:55:04,486 INFO L87 Difference]: Start difference. First operand 1691 states and 6903 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:55:05,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:55:05,026 INFO L93 Difference]: Finished difference Result 2797 states and 11463 transitions. [2022-11-21 13:55:05,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 13:55:05,027 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 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 [2022-11-21 13:55:05,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:55:05,037 INFO L225 Difference]: With dead ends: 2797 [2022-11-21 13:55:05,037 INFO L226 Difference]: Without dead ends: 2797 [2022-11-21 13:55:05,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-11-21 13:55:05,038 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 132 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 13:55:05,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 15 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 13:55:05,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2022-11-21 13:55:05,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 1627. [2022-11-21 13:55:05,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1613 states have (on average 4.0774953502789835) internal successors, (6577), 1626 states have internal predecessors, (6577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:55:05,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 6577 transitions. [2022-11-21 13:55:05,093 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 6577 transitions. Word has length 15 [2022-11-21 13:55:05,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:55:05,094 INFO L495 AbstractCegarLoop]: Abstraction has 1627 states and 6577 transitions. [2022-11-21 13:55:05,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:55:05,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 6577 transitions. [2022-11-21 13:55:05,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-21 13:55:05,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:55:05,096 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-21 13:55:05,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:55:05,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:55:05,308 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:55:05,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:55:05,308 INFO L85 PathProgramCache]: Analyzing trace with hash 268645905, now seen corresponding path program 4 times [2022-11-21 13:55:05,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:55:05,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1981397177] [2022-11-21 13:55:05,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 13:55:05,309 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 [2022-11-21 13:55:05,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:55:05,310 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:55:05,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:55:05,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 13:55:05,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:55:05,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-21 13:55:05,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:55:05,687 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 13:55:05,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-21 13:55:05,770 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 [2022-11-21 13:55:05,995 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 13:55:05,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:55:06,466 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 13:55:06,466 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:55:06,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1981397177] [2022-11-21 13:55:06,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1981397177] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:55:06,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:55:06,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-21 13:55:06,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64184875] [2022-11-21 13:55:06,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:55:06,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 13:55:06,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:55:06,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 13:55:06,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-11-21 13:55:06,468 INFO L87 Difference]: Start difference. First operand 1627 states and 6577 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2022-11-21 13:55:10,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:55:10,932 INFO L93 Difference]: Finished difference Result 2390 states and 9211 transitions. [2022-11-21 13:55:10,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-21 13:55:10,933 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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 16 [2022-11-21 13:55:10,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:55:10,938 INFO L225 Difference]: With dead ends: 2390 [2022-11-21 13:55:10,938 INFO L226 Difference]: Without dead ends: 2390 [2022-11-21 13:55:10,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2022-11-21 13:55:10,939 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 432 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 1372 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-21 13:55:10,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 173 Invalid, 1405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1372 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-21 13:55:10,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2390 states. [2022-11-21 13:55:10,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2390 to 2058. [2022-11-21 13:55:10,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2058 states, 2044 states have (on average 4.045009784735812) internal successors, (8268), 2057 states have internal predecessors, (8268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:55:11,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 8268 transitions. [2022-11-21 13:55:11,006 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 8268 transitions. Word has length 16 [2022-11-21 13:55:11,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:55:11,006 INFO L495 AbstractCegarLoop]: Abstraction has 2058 states and 8268 transitions. [2022-11-21 13:55:11,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2022-11-21 13:55:11,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 8268 transitions. [2022-11-21 13:55:11,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-21 13:55:11,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:55:11,013 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:55:11,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-21 13:55:11,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:55:11,231 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:55:11,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:55:11,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1402691954, now seen corresponding path program 3 times [2022-11-21 13:55:11,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:55:11,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [623722892] [2022-11-21 13:55:11,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 13:55:11,232 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 [2022-11-21 13:55:11,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:55:11,233 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:55:11,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:55:11,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-21 13:55:11,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:55:11,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-21 13:55:11,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:55:11,668 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 13:55:11,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-21 13:55:11,749 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 [2022-11-21 13:55:11,994 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 13:55:11,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:55:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 13:55:12,393 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:55:12,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [623722892] [2022-11-21 13:55:12,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [623722892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:55:12,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:55:12,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-21 13:55:12,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175687207] [2022-11-21 13:55:12,394 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:55:12,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 13:55:12,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:55:12,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 13:55:12,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-11-21 13:55:12,395 INFO L87 Difference]: Start difference. First operand 2058 states and 8268 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2022-11-21 13:55:15,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:55:15,740 INFO L93 Difference]: Finished difference Result 2188 states and 8311 transitions. [2022-11-21 13:55:15,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-21 13:55:15,742 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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 16 [2022-11-21 13:55:15,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:55:15,746 INFO L225 Difference]: With dead ends: 2188 [2022-11-21 13:55:15,746 INFO L226 Difference]: Without dead ends: 2188 [2022-11-21 13:55:15,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2022-11-21 13:55:15,747 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 500 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-21 13:55:15,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 164 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-21 13:55:15,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2022-11-21 13:55:15,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 1980. [2022-11-21 13:55:15,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1966 states have (on average 3.9567650050864698) internal successors, (7779), 1979 states have internal predecessors, (7779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:55:15,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 7779 transitions. [2022-11-21 13:55:15,779 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 7779 transitions. Word has length 16 [2022-11-21 13:55:15,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:55:15,779 INFO L495 AbstractCegarLoop]: Abstraction has 1980 states and 7779 transitions. [2022-11-21 13:55:15,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2022-11-21 13:55:15,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 7779 transitions. [2022-11-21 13:55:15,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-21 13:55:15,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:55:15,781 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:55:15,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-11-21 13:55:15,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:55:15,996 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:55:15,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:55:15,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1512546082, now seen corresponding path program 1 times [2022-11-21 13:55:15,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:55:15,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130301428] [2022-11-21 13:55:15,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:55:15,997 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 [2022-11-21 13:55:15,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:55:15,998 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:55:15,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:55:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:16,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 13:55:16,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:55:16,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 13:55:16,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:55:16,214 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:55:16,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130301428] [2022-11-21 13:55:16,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130301428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:55:16,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:55:16,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 13:55:16,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964387384] [2022-11-21 13:55:16,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:55:16,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:55:16,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:55:16,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:55:16,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:55:16,216 INFO L87 Difference]: Start difference. First operand 1980 states and 7779 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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) [2022-11-21 13:55:16,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:55:16,701 INFO L93 Difference]: Finished difference Result 2498 states and 9556 transitions. [2022-11-21 13:55:16,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 13:55:16,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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 [2022-11-21 13:55:16,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:55:16,707 INFO L225 Difference]: With dead ends: 2498 [2022-11-21 13:55:16,708 INFO L226 Difference]: Without dead ends: 2498 [2022-11-21 13:55:16,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:55:16,708 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 49 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 13:55:16,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 15 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 13:55:16,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2022-11-21 13:55:16,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2128. [2022-11-21 13:55:16,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2114 states have (on average 4.028855250709555) internal successors, (8517), 2127 states have internal predecessors, (8517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:55:16,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 8517 transitions. [2022-11-21 13:55:16,744 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 8517 transitions. Word has length 17 [2022-11-21 13:55:16,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:55:16,744 INFO L495 AbstractCegarLoop]: Abstraction has 2128 states and 8517 transitions. [2022-11-21 13:55:16,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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) [2022-11-21 13:55:16,744 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 8517 transitions. [2022-11-21 13:55:16,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-21 13:55:16,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:55:16,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:55:16,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-21 13:55:16,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:55:16,946 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:55:16,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:55:16,946 INFO L85 PathProgramCache]: Analyzing trace with hash 250004676, now seen corresponding path program 2 times [2022-11-21 13:55:16,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:55:16,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1433833493] [2022-11-21 13:55:16,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:55:16,947 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 [2022-11-21 13:55:16,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:55:16,947 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:55:16,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:55:17,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 13:55:17,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:55:17,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 13:55:17,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:55:17,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 13:55:17,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:55:17,202 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:55:17,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1433833493] [2022-11-21 13:55:17,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1433833493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:55:17,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:55:17,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 13:55:17,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930163913] [2022-11-21 13:55:17,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:55:17,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:55:17,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:55:17,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:55:17,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:55:17,203 INFO L87 Difference]: Start difference. First operand 2128 states and 8517 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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) [2022-11-21 13:55:17,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:55:17,730 INFO L93 Difference]: Finished difference Result 2302 states and 8784 transitions. [2022-11-21 13:55:17,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 13:55:17,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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 [2022-11-21 13:55:17,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:55:17,737 INFO L225 Difference]: With dead ends: 2302 [2022-11-21 13:55:17,738 INFO L226 Difference]: Without dead ends: 2302 [2022-11-21 13:55:17,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:55:17,738 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 65 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 13:55:17,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 16 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 13:55:17,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2302 states. [2022-11-21 13:55:17,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2302 to 1906. [2022-11-21 13:55:17,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1892 states have (on average 3.877906976744186) internal successors, (7337), 1905 states have internal predecessors, (7337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:55:17,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 7337 transitions. [2022-11-21 13:55:17,809 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 7337 transitions. Word has length 17 [2022-11-21 13:55:17,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:55:17,809 INFO L495 AbstractCegarLoop]: Abstraction has 1906 states and 7337 transitions. [2022-11-21 13:55:17,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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) [2022-11-21 13:55:17,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 7337 transitions. [2022-11-21 13:55:17,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-21 13:55:17,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:55:17,812 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-21 13:55:17,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:55:18,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:55:18,025 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:55:18,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:55:18,028 INFO L85 PathProgramCache]: Analyzing trace with hash 908756758, now seen corresponding path program 5 times [2022-11-21 13:55:18,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:55:18,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1367225079] [2022-11-21 13:55:18,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 13:55:18,029 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 [2022-11-21 13:55:18,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:55:18,030 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:55:18,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:55:18,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-21 13:55:18,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:55:18,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 13:55:18,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:55:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 13:55:18,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:55:19,555 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-21 13:55:19,555 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:55:19,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1367225079] [2022-11-21 13:55:19,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1367225079] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:55:19,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:55:19,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2022-11-21 13:55:19,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541471281] [2022-11-21 13:55:19,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:55:19,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-21 13:55:19,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:55:19,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-21 13:55:19,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2022-11-21 13:55:19,557 INFO L87 Difference]: Start difference. First operand 1906 states and 7337 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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) [2022-11-21 13:55:28,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:55:28,768 INFO L93 Difference]: Finished difference Result 4701 states and 17248 transitions. [2022-11-21 13:55:28,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-21 13:55:28,769 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 18 [2022-11-21 13:55:28,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:55:28,779 INFO L225 Difference]: With dead ends: 4701 [2022-11-21 13:55:28,780 INFO L226 Difference]: Without dead ends: 4701 [2022-11-21 13:55:28,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=589, Invalid=2063, Unknown=0, NotChecked=0, Total=2652 [2022-11-21 13:55:28,781 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 1258 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 2675 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1258 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 2758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-21 13:55:28,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1258 Valid, 332 Invalid, 2758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2675 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-11-21 13:55:28,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4701 states. [2022-11-21 13:55:28,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4701 to 2834. [2022-11-21 13:55:28,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2834 states, 2820 states have (on average 3.99645390070922) internal successors, (11270), 2833 states have internal predecessors, (11270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:55:28,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 11270 transitions. [2022-11-21 13:55:28,854 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 11270 transitions. Word has length 18 [2022-11-21 13:55:28,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:55:28,855 INFO L495 AbstractCegarLoop]: Abstraction has 2834 states and 11270 transitions. [2022-11-21 13:55:28,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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) [2022-11-21 13:55:28,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 11270 transitions. [2022-11-21 13:55:28,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-21 13:55:28,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:55:28,858 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:55:28,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:55:29,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:55:29,072 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:55:29,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:55:29,073 INFO L85 PathProgramCache]: Analyzing trace with hash 2042802807, now seen corresponding path program 4 times [2022-11-21 13:55:29,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:55:29,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689977633] [2022-11-21 13:55:29,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 13:55:29,073 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 [2022-11-21 13:55:29,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:55:29,074 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:55:29,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:55:29,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 13:55:29,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:55:29,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-21 13:55:29,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:55:29,549 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 13:55:29,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-21 13:55:29,694 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-21 13:55:29,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-21 13:55:29,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:55:29,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-11-21 13:55:29,937 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 13:55:29,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-21 13:55:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 13:55:30,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:55:31,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 13:55:31,998 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:55:31,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689977633] [2022-11-21 13:55:31,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689977633] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:55:31,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:55:31,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-21 13:55:31,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417839934] [2022-11-21 13:55:31,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:55:31,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 13:55:31,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:55:32,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 13:55:32,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-11-21 13:55:32,001 INFO L87 Difference]: Start difference. First operand 2834 states and 11270 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 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) [2022-11-21 13:55:44,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 13:55:46,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 13:55:59,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 13:56:00,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 13:56:21,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:56:21,828 INFO L93 Difference]: Finished difference Result 13955 states and 55242 transitions. [2022-11-21 13:56:21,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-21 13:56:21,831 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 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 18 [2022-11-21 13:56:21,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:56:21,874 INFO L225 Difference]: With dead ends: 13955 [2022-11-21 13:56:21,874 INFO L226 Difference]: Without dead ends: 13955 [2022-11-21 13:56:21,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1697 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=853, Invalid=4697, Unknown=0, NotChecked=0, Total=5550 [2022-11-21 13:56:21,875 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 1574 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 3204 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1574 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 3289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 3204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:56:21,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1574 Valid, 447 Invalid, 3289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 3204 Invalid, 0 Unknown, 0 Unchecked, 28.1s Time] [2022-11-21 13:56:21,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13955 states. [2022-11-21 13:56:22,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13955 to 3901. [2022-11-21 13:56:22,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3887 states have (on average 4.19243632621559) internal successors, (16296), 3900 states have internal predecessors, (16296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:22,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 16296 transitions. [2022-11-21 13:56:22,096 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 16296 transitions. Word has length 18 [2022-11-21 13:56:22,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:56:22,097 INFO L495 AbstractCegarLoop]: Abstraction has 3901 states and 16296 transitions. [2022-11-21 13:56:22,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 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) [2022-11-21 13:56:22,097 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 16296 transitions. [2022-11-21 13:56:22,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-21 13:56:22,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:56:22,099 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:56:22,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-21 13:56:22,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:56:22,311 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:56:22,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:22,311 INFO L85 PathProgramCache]: Analyzing trace with hash 2042802809, now seen corresponding path program 2 times [2022-11-21 13:56:22,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:56:22,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2018247229] [2022-11-21 13:56:22,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:56:22,312 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 [2022-11-21 13:56:22,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:56:22,313 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:56:22,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:56:22,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 13:56:22,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:56:22,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-21 13:56:22,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:56:22,666 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 13:56:22,667 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-21 13:56:22,821 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-21 13:56:22,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-21 13:56:22,960 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-21 13:56:22,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-21 13:56:22,979 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 13:56:22,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-21 13:56:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-21 13:56:23,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:56:23,262 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:56:23,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2018247229] [2022-11-21 13:56:23,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2018247229] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:56:23,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:56:23,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:56:23,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133451758] [2022-11-21 13:56:23,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:56:23,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:56:23,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:56:23,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:56:23,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:56:23,264 INFO L87 Difference]: Start difference. First operand 3901 states and 16296 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:23,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:56:23,644 INFO L93 Difference]: Finished difference Result 3637 states and 14878 transitions. [2022-11-21 13:56:23,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 13:56:23,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-21 13:56:23,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:56:23,655 INFO L225 Difference]: With dead ends: 3637 [2022-11-21 13:56:23,655 INFO L226 Difference]: Without dead ends: 3637 [2022-11-21 13:56:23,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:56:23,655 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 81 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 13:56:23,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 3 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 13:56:23,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3637 states. [2022-11-21 13:56:23,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3637 to 3523. [2022-11-21 13:56:23,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3523 states, 3513 states have (on average 4.116140051238258) internal successors, (14460), 3522 states have internal predecessors, (14460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:23,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3523 states to 3523 states and 14460 transitions. [2022-11-21 13:56:23,766 INFO L78 Accepts]: Start accepts. Automaton has 3523 states and 14460 transitions. Word has length 18 [2022-11-21 13:56:23,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:56:23,766 INFO L495 AbstractCegarLoop]: Abstraction has 3523 states and 14460 transitions. [2022-11-21 13:56:23,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:23,766 INFO L276 IsEmpty]: Start isEmpty. Operand 3523 states and 14460 transitions. [2022-11-21 13:56:23,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-21 13:56:23,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:56:23,769 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:56:23,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-21 13:56:23,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:56:23,970 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:56:23,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:23,971 INFO L85 PathProgramCache]: Analyzing trace with hash 333468502, now seen corresponding path program 5 times [2022-11-21 13:56:23,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:56:23,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937134955] [2022-11-21 13:56:23,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 13:56:23,971 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 [2022-11-21 13:56:23,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:56:23,972 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:56:23,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:56:24,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-21 13:56:24,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:56:24,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-21 13:56:24,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:56:24,517 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 13:56:24,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-21 13:56:24,708 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 12 [2022-11-21 13:56:25,325 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:56:25,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:56:25,976 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 13:56:25,977 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:56:25,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937134955] [2022-11-21 13:56:25,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937134955] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:56:25,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:56:25,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 23 [2022-11-21 13:56:25,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404641983] [2022-11-21 13:56:25,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:56:25,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 13:56:25,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:56:25,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 13:56:25,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2022-11-21 13:56:25,979 INFO L87 Difference]: Start difference. First operand 3523 states and 14460 transitions. Second operand has 24 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:32,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:56:32,735 INFO L93 Difference]: Finished difference Result 4535 states and 17792 transitions. [2022-11-21 13:56:32,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-21 13:56:32,736 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 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 20 [2022-11-21 13:56:32,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:56:32,747 INFO L225 Difference]: With dead ends: 4535 [2022-11-21 13:56:32,747 INFO L226 Difference]: Without dead ends: 4535 [2022-11-21 13:56:32,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=359, Invalid=1621, Unknown=0, NotChecked=0, Total=1980 [2022-11-21 13:56:32,748 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 754 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 2206 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 2266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:56:32,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [754 Valid, 343 Invalid, 2266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2206 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-21 13:56:32,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4535 states. [2022-11-21 13:56:32,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4535 to 4159. [2022-11-21 13:56:32,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4159 states, 4149 states have (on average 4.051578693661123) internal successors, (16810), 4158 states have internal predecessors, (16810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:32,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4159 states to 4159 states and 16810 transitions. [2022-11-21 13:56:32,855 INFO L78 Accepts]: Start accepts. Automaton has 4159 states and 16810 transitions. Word has length 20 [2022-11-21 13:56:32,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:56:32,855 INFO L495 AbstractCegarLoop]: Abstraction has 4159 states and 16810 transitions. [2022-11-21 13:56:32,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:32,855 INFO L276 IsEmpty]: Start isEmpty. Operand 4159 states and 16810 transitions. [2022-11-21 13:56:32,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-21 13:56:32,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:56:32,858 INFO L195 NwaCegarLoop]: trace histogram [13, 4, 1, 1, 1] [2022-11-21 13:56:32,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-21 13:56:33,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:56:33,059 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:56:33,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:33,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1865665464, now seen corresponding path program 2 times [2022-11-21 13:56:33,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:56:33,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891362744] [2022-11-21 13:56:33,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:56:33,060 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:56:33,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:56:33,060 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:56:33,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:56:33,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 13:56:33,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:56:33,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-21 13:56:33,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:56:33,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 13:56:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 48 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-21 13:56:33,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:56:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:56:39,023 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:56:39,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891362744] [2022-11-21 13:56:39,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891362744] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:56:39,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:56:39,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19] total 33 [2022-11-21 13:56:39,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260758983] [2022-11-21 13:56:39,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:56:39,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 13:56:39,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:56:39,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 13:56:39,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=979, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 13:56:39,025 INFO L87 Difference]: Start difference. First operand 4159 states and 16810 transitions. Second operand has 34 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:56,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 13:57:26,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:26,903 INFO L93 Difference]: Finished difference Result 22917 states and 92584 transitions. [2022-11-21 13:57:26,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-21 13:57:26,904 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-21 13:57:26,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:27,084 INFO L225 Difference]: With dead ends: 22917 [2022-11-21 13:57:27,084 INFO L226 Difference]: Without dead ends: 22917 [2022-11-21 13:57:27,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=705, Invalid=3585, Unknown=0, NotChecked=0, Total=4290 [2022-11-21 13:57:27,086 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 3469 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 6697 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3469 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 6833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 6697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.8s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:27,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3469 Valid, 786 Invalid, 6833 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [136 Valid, 6697 Invalid, 0 Unknown, 0 Unchecked, 39.8s Time] [2022-11-21 13:57:27,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22917 states. [2022-11-21 13:57:27,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22917 to 4151. [2022-11-21 13:57:27,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4151 states, 4141 states have (on average 4.055059164453031) internal successors, (16792), 4150 states have internal predecessors, (16792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:27,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4151 states to 4151 states and 16792 transitions. [2022-11-21 13:57:27,435 INFO L78 Accepts]: Start accepts. Automaton has 4151 states and 16792 transitions. Word has length 20 [2022-11-21 13:57:27,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:27,435 INFO L495 AbstractCegarLoop]: Abstraction has 4151 states and 16792 transitions. [2022-11-21 13:57:27,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:27,436 INFO L276 IsEmpty]: Start isEmpty. Operand 4151 states and 16792 transitions. [2022-11-21 13:57:27,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-21 13:57:27,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:27,439 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:27,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:57:27,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:57:27,642 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:57:27,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:27,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1374836625, now seen corresponding path program 1 times [2022-11-21 13:57:27,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:57:27,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654343711] [2022-11-21 13:57:27,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:27,643 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 [2022-11-21 13:57:27,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:57:27,645 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:57:27,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:57:27,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:27,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 13:57:27,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:57:28,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:28,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:57:28,112 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:57:28,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1654343711] [2022-11-21 13:57:28,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1654343711] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:28,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:28,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:57:28,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957362938] [2022-11-21 13:57:28,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:28,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:57:28,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:57:28,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:57:28,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:57:28,114 INFO L87 Difference]: Start difference. First operand 4151 states and 16792 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:28,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:28,803 INFO L93 Difference]: Finished difference Result 4574 states and 18086 transitions. [2022-11-21 13:57:28,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 13:57:28,805 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-21 13:57:28,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:28,837 INFO L225 Difference]: With dead ends: 4574 [2022-11-21 13:57:28,837 INFO L226 Difference]: Without dead ends: 4469 [2022-11-21 13:57:28,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-21 13:57:28,838 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 50 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:28,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 17 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 13:57:28,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2022-11-21 13:57:28,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 4313. [2022-11-21 13:57:28,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4313 states, 4303 states have (on average 4.01301417615617) internal successors, (17268), 4312 states have internal predecessors, (17268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:28,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4313 states to 4313 states and 17268 transitions. [2022-11-21 13:57:28,955 INFO L78 Accepts]: Start accepts. Automaton has 4313 states and 17268 transitions. Word has length 21 [2022-11-21 13:57:28,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:28,955 INFO L495 AbstractCegarLoop]: Abstraction has 4313 states and 17268 transitions. [2022-11-21 13:57:28,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:28,955 INFO L276 IsEmpty]: Start isEmpty. Operand 4313 states and 17268 transitions. [2022-11-21 13:57:28,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-21 13:57:28,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:28,959 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:28,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-21 13:57:29,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:57:29,168 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:57:29,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:29,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1050137350, now seen corresponding path program 3 times [2022-11-21 13:57:29,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:57:29,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [214701051] [2022-11-21 13:57:29,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 13:57:29,169 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 [2022-11-21 13:57:29,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:57:29,170 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:57:29,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:57:29,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-21 13:57:29,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:57:29,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-21 13:57:29,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:57:30,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-21 13:57:30,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:57:31,536 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 36 treesize of output 32 [2022-11-21 13:57:34,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-21 13:57:34,585 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:57:34,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [214701051] [2022-11-21 13:57:34,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [214701051] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:57:34,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:57:34,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-21 13:57:34,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780655786] [2022-11-21 13:57:34,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:57:34,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 13:57:34,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:57:34,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 13:57:34,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-11-21 13:57:34,587 INFO L87 Difference]: Start difference. First operand 4313 states and 17268 transitions. Second operand has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:48,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:48,435 INFO L93 Difference]: Finished difference Result 13319 states and 54630 transitions. [2022-11-21 13:57:48,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-21 13:57:48,438 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-21 13:57:48,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:48,564 INFO L225 Difference]: With dead ends: 13319 [2022-11-21 13:57:48,564 INFO L226 Difference]: Without dead ends: 13319 [2022-11-21 13:57:48,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=495, Invalid=1065, Unknown=0, NotChecked=0, Total=1560 [2022-11-21 13:57:48,566 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 463 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:48,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 71 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-11-21 13:57:48,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13319 states. [2022-11-21 13:57:48,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13319 to 7181. [2022-11-21 13:57:48,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7181 states, 7171 states have (on average 4.522521266211128) internal successors, (32431), 7180 states have internal predecessors, (32431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:48,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7181 states to 7181 states and 32431 transitions. [2022-11-21 13:57:48,986 INFO L78 Accepts]: Start accepts. Automaton has 7181 states and 32431 transitions. Word has length 21 [2022-11-21 13:57:48,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:48,986 INFO L495 AbstractCegarLoop]: Abstraction has 7181 states and 32431 transitions. [2022-11-21 13:57:48,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:48,986 INFO L276 IsEmpty]: Start isEmpty. Operand 7181 states and 32431 transitions. [2022-11-21 13:57:48,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-21 13:57:48,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:48,991 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:49,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-21 13:57:49,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:57:49,191 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:57:49,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:49,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1810009176, now seen corresponding path program 4 times [2022-11-21 13:57:49,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:57:49,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2056963275] [2022-11-21 13:57:49,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 13:57:49,193 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 [2022-11-21 13:57:49,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:57:49,194 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:57:49,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:57:49,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 13:57:49,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:57:49,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 13:57:49,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:57:49,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 13:57:49,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:57:50,016 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 27 treesize of output 23 [2022-11-21 13:57:50,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 13:57:50,369 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:57:50,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2056963275] [2022-11-21 13:57:50,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2056963275] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:57:50,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:57:50,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-21 13:57:50,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632077257] [2022-11-21 13:57:50,370 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:57:50,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 13:57:50,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:57:50,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 13:57:50,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-21 13:57:50,371 INFO L87 Difference]: Start difference. First operand 7181 states and 32431 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:54,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:54,113 INFO L93 Difference]: Finished difference Result 20027 states and 92539 transitions. [2022-11-21 13:57:54,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-21 13:57:54,114 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-21 13:57:54,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:54,306 INFO L225 Difference]: With dead ends: 20027 [2022-11-21 13:57:54,306 INFO L226 Difference]: Without dead ends: 20027 [2022-11-21 13:57:54,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=245, Invalid=625, Unknown=0, NotChecked=0, Total=870 [2022-11-21 13:57:54,307 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 712 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:54,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 61 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-21 13:57:54,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20027 states. [2022-11-21 13:57:54,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20027 to 7459. [2022-11-21 13:57:54,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7459 states, 7449 states have (on average 4.626661296818365) internal successors, (34464), 7458 states have internal predecessors, (34464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:54,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7459 states to 7459 states and 34464 transitions. [2022-11-21 13:57:54,950 INFO L78 Accepts]: Start accepts. Automaton has 7459 states and 34464 transitions. Word has length 21 [2022-11-21 13:57:54,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:54,950 INFO L495 AbstractCegarLoop]: Abstraction has 7459 states and 34464 transitions. [2022-11-21 13:57:54,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:54,950 INFO L276 IsEmpty]: Start isEmpty. Operand 7459 states and 34464 transitions. [2022-11-21 13:57:54,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 13:57:54,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:54,955 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:54,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-21 13:57:55,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:57:55,156 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:57:55,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:55,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1808060785, now seen corresponding path program 6 times [2022-11-21 13:57:55,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:57:55,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955376563] [2022-11-21 13:57:55,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 13:57:55,157 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 [2022-11-21 13:57:55,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:57:55,158 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:57:55,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:57:55,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-21 13:57:55,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:57:55,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-21 13:57:55,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:57:55,794 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 13:57:55,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-21 13:57:55,957 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-21 13:57:55,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-21 13:57:56,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:57:56,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-21 13:57:56,187 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 13:57:56,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-21 13:57:56,564 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-21 13:57:56,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:57:58,523 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-21 13:57:58,523 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:57:58,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955376563] [2022-11-21 13:57:58,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955376563] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:57:58,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:57:58,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-21 13:57:58,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707965170] [2022-11-21 13:57:58,524 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:57:58,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 13:57:58,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:57:58,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 13:57:58,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-11-21 13:57:58,526 INFO L87 Difference]: Start difference. First operand 7459 states and 34464 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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) [2022-11-21 13:58:06,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:58:06,795 INFO L93 Difference]: Finished difference Result 21549 states and 105399 transitions. [2022-11-21 13:58:06,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 13:58:06,796 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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 22 [2022-11-21 13:58:06,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:58:06,984 INFO L225 Difference]: With dead ends: 21549 [2022-11-21 13:58:06,984 INFO L226 Difference]: Without dead ends: 21549 [2022-11-21 13:58:06,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=226, Invalid=476, Unknown=0, NotChecked=0, Total=702 [2022-11-21 13:58:06,984 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 621 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:58:06,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [621 Valid, 73 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-21 13:58:07,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21549 states. [2022-11-21 13:58:07,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21549 to 15645. [2022-11-21 13:58:07,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15645 states, 15635 states have (on average 5.154461144867285) internal successors, (80590), 15644 states have internal predecessors, (80590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:58:07,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15645 states to 15645 states and 80590 transitions. [2022-11-21 13:58:07,605 INFO L78 Accepts]: Start accepts. Automaton has 15645 states and 80590 transitions. Word has length 22 [2022-11-21 13:58:07,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:58:07,605 INFO L495 AbstractCegarLoop]: Abstraction has 15645 states and 80590 transitions. [2022-11-21 13:58:07,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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) [2022-11-21 13:58:07,606 INFO L276 IsEmpty]: Start isEmpty. Operand 15645 states and 80590 transitions. [2022-11-21 13:58:07,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 13:58:07,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:58:07,609 INFO L195 NwaCegarLoop]: trace histogram [14, 5, 1, 1, 1] [2022-11-21 13:58:07,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-11-21 13:58:07,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:58:07,810 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:58:07,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:58:07,810 INFO L85 PathProgramCache]: Analyzing trace with hash -794769539, now seen corresponding path program 3 times [2022-11-21 13:58:07,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:58:07,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1433595301] [2022-11-21 13:58:07,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 13:58:07,811 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 [2022-11-21 13:58:07,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:58:07,815 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:58:07,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:58:08,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-21 13:58:08,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:58:08,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-21 13:58:08,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:58:08,611 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 13:58:08,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-21 13:58:08,913 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-21 13:58:08,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-21 13:58:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 54 proven. 30 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-21 13:58:09,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:58:11,118 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 54 proven. 30 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-21 13:58:11,118 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:58:11,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1433595301] [2022-11-21 13:58:11,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1433595301] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:58:11,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:58:11,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-11-21 13:58:11,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651299705] [2022-11-21 13:58:11,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:58:11,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-21 13:58:11,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:58:11,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-21 13:58:11,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-11-21 13:58:11,121 INFO L87 Difference]: Start difference. First operand 15645 states and 80590 transitions. Second operand has 26 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 25 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) [2022-11-21 13:58:22,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:58:22,731 INFO L93 Difference]: Finished difference Result 49770 states and 253275 transitions. [2022-11-21 13:58:22,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-21 13:58:22,733 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 25 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 22 [2022-11-21 13:58:22,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:58:23,299 INFO L225 Difference]: With dead ends: 49770 [2022-11-21 13:58:23,299 INFO L226 Difference]: Without dead ends: 49770 [2022-11-21 13:58:23,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=413, Invalid=1843, Unknown=0, NotChecked=0, Total=2256 [2022-11-21 13:58:23,301 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1676 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 2367 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1676 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 2540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 2367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-21 13:58:23,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1676 Valid, 261 Invalid, 2540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 2367 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-11-21 13:58:23,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49770 states. [2022-11-21 13:58:24,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49770 to 15651. [2022-11-21 13:58:24,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15651 states, 15641 states have (on average 5.152931398248194) internal successors, (80597), 15650 states have internal predecessors, (80597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:58:24,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15651 states to 15651 states and 80597 transitions. [2022-11-21 13:58:24,680 INFO L78 Accepts]: Start accepts. Automaton has 15651 states and 80597 transitions. Word has length 22 [2022-11-21 13:58:24,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:58:24,680 INFO L495 AbstractCegarLoop]: Abstraction has 15651 states and 80597 transitions. [2022-11-21 13:58:24,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 25 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) [2022-11-21 13:58:24,680 INFO L276 IsEmpty]: Start isEmpty. Operand 15651 states and 80597 transitions. [2022-11-21 13:58:24,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 13:58:24,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:58:24,685 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2022-11-21 13:58:24,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:58:24,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:58:24,899 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:58:24,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:58:24,899 INFO L85 PathProgramCache]: Analyzing trace with hash -2027238474, now seen corresponding path program 6 times [2022-11-21 13:58:24,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:58:24,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [278529304] [2022-11-21 13:58:24,900 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 13:58:24,900 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 [2022-11-21 13:58:24,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:58:24,901 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:58:24,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:58:25,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-21 13:58:25,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:58:25,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 13:58:25,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:58:25,577 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 13:58:25,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-21 13:58:25,759 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-21 13:58:25,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-21 13:58:26,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:58:26,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-21 13:58:26,077 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 13:58:26,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-21 13:58:26,565 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-21 13:58:26,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:58:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-21 13:58:29,497 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:58:29,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [278529304] [2022-11-21 13:58:29,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [278529304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:58:29,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:58:29,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-21 13:58:29,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181413304] [2022-11-21 13:58:29,498 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:58:29,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-21 13:58:29,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:58:29,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-21 13:58:29,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2022-11-21 13:58:29,499 INFO L87 Difference]: Start difference. First operand 15651 states and 80597 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) [2022-11-21 13:58:57,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:58:57,777 INFO L93 Difference]: Finished difference Result 42695 states and 201362 transitions. [2022-11-21 13:58:57,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-21 13:58:57,779 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 22 [2022-11-21 13:58:57,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:58:58,263 INFO L225 Difference]: With dead ends: 42695 [2022-11-21 13:58:58,263 INFO L226 Difference]: Without dead ends: 42695 [2022-11-21 13:58:58,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=360, Invalid=830, Unknown=0, NotChecked=0, Total=1190 [2022-11-21 13:58:58,264 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1294 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1294 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-21 13:58:58,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1294 Valid, 131 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1451 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-11-21 13:58:58,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42695 states. [2022-11-21 13:58:59,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42695 to 21955. [2022-11-21 13:58:59,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21955 states, 21945 states have (on average 5.343768512189564) internal successors, (117269), 21954 states have internal predecessors, (117269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:58:59,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21955 states to 21955 states and 117269 transitions. [2022-11-21 13:58:59,798 INFO L78 Accepts]: Start accepts. Automaton has 21955 states and 117269 transitions. Word has length 22 [2022-11-21 13:58:59,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:58:59,799 INFO L495 AbstractCegarLoop]: Abstraction has 21955 states and 117269 transitions. [2022-11-21 13:58:59,799 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) [2022-11-21 13:58:59,799 INFO L276 IsEmpty]: Start isEmpty. Operand 21955 states and 117269 transitions. [2022-11-21 13:58:59,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-21 13:58:59,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:58:59,805 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:58:59,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-21 13:59:00,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:59:00,024 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:59:00,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:59:00,024 INFO L85 PathProgramCache]: Analyzing trace with hash -42977919, now seen corresponding path program 5 times [2022-11-21 13:59:00,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:59:00,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [464398544] [2022-11-21 13:59:00,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 13:59:00,025 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 [2022-11-21 13:59:00,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:59:00,026 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:59:00,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:59:00,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-21 13:59:00,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:59:00,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 13:59:00,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:59:00,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 13:59:00,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:59:00,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 13:59:00,869 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:59:00,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [464398544] [2022-11-21 13:59:00,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [464398544] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:59:00,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:59:00,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2022-11-21 13:59:00,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223221883] [2022-11-21 13:59:00,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:59:00,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-21 13:59:00,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:59:00,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-21 13:59:00,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-11-21 13:59:00,871 INFO L87 Difference]: Start difference. First operand 21955 states and 117269 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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) [2022-11-21 13:59:04,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:59:04,767 INFO L93 Difference]: Finished difference Result 34115 states and 173149 transitions. [2022-11-21 13:59:04,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 13:59:04,772 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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 23 [2022-11-21 13:59:04,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:59:04,962 INFO L225 Difference]: With dead ends: 34115 [2022-11-21 13:59:04,962 INFO L226 Difference]: Without dead ends: 34103 [2022-11-21 13:59:04,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-11-21 13:59:04,963 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 238 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1146 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:59:04,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 89 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1146 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-21 13:59:05,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34103 states. [2022-11-21 13:59:05,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34103 to 26721. [2022-11-21 13:59:06,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26721 states, 26711 states have (on average 5.352139567968253) internal successors, (142961), 26720 states have internal predecessors, (142961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:59:06,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26721 states to 26721 states and 142961 transitions. [2022-11-21 13:59:06,441 INFO L78 Accepts]: Start accepts. Automaton has 26721 states and 142961 transitions. Word has length 23 [2022-11-21 13:59:06,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:59:06,441 INFO L495 AbstractCegarLoop]: Abstraction has 26721 states and 142961 transitions. [2022-11-21 13:59:06,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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) [2022-11-21 13:59:06,442 INFO L276 IsEmpty]: Start isEmpty. Operand 26721 states and 142961 transitions. [2022-11-21 13:59:06,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-21 13:59:06,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:59:06,447 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:59:06,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:59:06,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:59:06,652 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:59:06,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:59:06,652 INFO L85 PathProgramCache]: Analyzing trace with hash -922070413, now seen corresponding path program 6 times [2022-11-21 13:59:06,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:59:06,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [789479062] [2022-11-21 13:59:06,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 13:59:06,653 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 [2022-11-21 13:59:06,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:59:06,654 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:59:06,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:59:07,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-21 13:59:07,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:59:07,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-21 13:59:07,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:59:07,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 13:59:08,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-21 13:59:08,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:59:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-21 13:59:11,173 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:59:11,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [789479062] [2022-11-21 13:59:11,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [789479062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:59:11,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:59:11,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-21 13:59:11,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70768624] [2022-11-21 13:59:11,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:59:11,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-21 13:59:11,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:59:11,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-21 13:59:11,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2022-11-21 13:59:11,175 INFO L87 Difference]: Start difference. First operand 26721 states and 142961 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:59:32,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:59:32,504 INFO L93 Difference]: Finished difference Result 56565 states and 290038 transitions. [2022-11-21 13:59:32,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-21 13:59:32,507 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-21 13:59:32,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:59:32,879 INFO L225 Difference]: With dead ends: 56565 [2022-11-21 13:59:32,879 INFO L226 Difference]: Without dead ends: 56407 [2022-11-21 13:59:32,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=545, Invalid=1095, Unknown=0, NotChecked=0, Total=1640 [2022-11-21 13:59:32,880 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 397 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 1146 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-11-21 13:59:32,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 105 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1146 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2022-11-21 13:59:32,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56407 states. [2022-11-21 13:59:34,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56407 to 27227. [2022-11-21 13:59:34,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27227 states, 27217 states have (on average 5.162655693132969) internal successors, (140512), 27226 states have internal predecessors, (140512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:59:34,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27227 states to 27227 states and 140512 transitions. [2022-11-21 13:59:34,806 INFO L78 Accepts]: Start accepts. Automaton has 27227 states and 140512 transitions. Word has length 23 [2022-11-21 13:59:34,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:59:34,806 INFO L495 AbstractCegarLoop]: Abstraction has 27227 states and 140512 transitions. [2022-11-21 13:59:34,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:59:34,806 INFO L276 IsEmpty]: Start isEmpty. Operand 27227 states and 140512 transitions. [2022-11-21 13:59:34,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-21 13:59:34,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:59:34,813 INFO L195 NwaCegarLoop]: trace histogram [14, 6, 1, 1, 1] [2022-11-21 13:59:34,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:59:35,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 13:59:35,013 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 13:59:35,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:59:35,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1566088302, now seen corresponding path program 4 times [2022-11-21 13:59:35,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 13:59:35,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [906377711] [2022-11-21 13:59:35,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 13:59:35,015 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 [2022-11-21 13:59:35,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 13:59:35,016 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 13:59:35,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 13:59:35,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 13:59:35,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:59:35,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-21 13:59:35,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:59:35,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 13:59:36,246 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 56 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-21 13:59:36,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:59:43,464 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:59:43,464 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 13:59:43,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [906377711] [2022-11-21 13:59:43,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [906377711] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:59:43,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:59:43,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22] total 38 [2022-11-21 13:59:43,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062405858] [2022-11-21 13:59:43,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 13:59:43,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-21 13:59:43,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 13:59:43,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-21 13:59:43,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2022-11-21 13:59:43,467 INFO L87 Difference]: Start difference. First operand 27227 states and 140512 transitions. Second operand has 39 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:58,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 14:00:58,696 INFO L93 Difference]: Finished difference Result 378295 states and 1962561 transitions. [2022-11-21 14:00:58,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-21 14:00:58,698 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-21 14:00:58,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 14:01:03,642 INFO L225 Difference]: With dead ends: 378295 [2022-11-21 14:01:03,643 INFO L226 Difference]: Without dead ends: 378295 [2022-11-21 14:01:03,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=1195, Invalid=8311, Unknown=0, NotChecked=0, Total=9506 [2022-11-21 14:01:03,645 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 6085 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 9192 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6085 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 9438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 9192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.9s IncrementalHoareTripleChecker+Time [2022-11-21 14:01:03,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6085 Valid, 1047 Invalid, 9438 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [246 Valid, 9192 Invalid, 0 Unknown, 0 Unchecked, 53.9s Time] [2022-11-21 14:01:04,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378295 states. [2022-11-21 14:01:11,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378295 to 27234. [2022-11-21 14:01:11,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27234 states, 27224 states have (on average 5.161805759623861) internal successors, (140525), 27233 states have internal predecessors, (140525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:01:11,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27234 states to 27234 states and 140525 transitions. [2022-11-21 14:01:11,706 INFO L78 Accepts]: Start accepts. Automaton has 27234 states and 140525 transitions. Word has length 23 [2022-11-21 14:01:11,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 14:01:11,706 INFO L495 AbstractCegarLoop]: Abstraction has 27234 states and 140525 transitions. [2022-11-21 14:01:11,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:01:11,707 INFO L276 IsEmpty]: Start isEmpty. Operand 27234 states and 140525 transitions. [2022-11-21 14:01:11,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-21 14:01:11,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 14:01:11,712 INFO L195 NwaCegarLoop]: trace histogram [13, 8, 1, 1, 1] [2022-11-21 14:01:11,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 14:01:11,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 14:01:11,913 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 14:01:11,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:01:11,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1729820920, now seen corresponding path program 5 times [2022-11-21 14:01:11,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 14:01:11,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041302876] [2022-11-21 14:01:11,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 14:01:11,914 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 14:01:11,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 14:01:11,915 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 14:01:11,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 14:01:12,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-21 14:01:12,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 14:01:12,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-21 14:01:12,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:01:12,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 14:01:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-21 14:01:13,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:01:20,830 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-21 14:01:20,831 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 14:01:20,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041302876] [2022-11-21 14:01:20,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041302876] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:01:20,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 14:01:20,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2022-11-21 14:01:20,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608055328] [2022-11-21 14:01:20,831 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 14:01:20,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-21 14:01:20,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 14:01:20,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-21 14:01:20,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2022-11-21 14:01:20,833 INFO L87 Difference]: Start difference. First operand 27234 states and 140525 transitions. Second operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 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) [2022-11-21 14:01:40,917 WARN L233 SmtUtils]: Spent 16.22s on a formula simplification. DAG size of input: 157 DAG size of output: 157 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 14:01:43,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 14:01:45,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 14:01:47,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 14:01:49,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 14:01:51,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 14:01:53,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 14:01:55,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 14:01:57,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 14:01:59,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 14:02:01,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 14:02:03,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 14:02:05,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 14:02:07,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 14:02:35,760 WARN L233 SmtUtils]: Spent 10.77s on a formula simplification. DAG size of input: 150 DAG size of output: 150 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 14:02:48,196 WARN L233 SmtUtils]: Spent 8.31s on a formula simplification. DAG size of input: 139 DAG size of output: 139 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 14:02:57,511 WARN L233 SmtUtils]: Spent 5.62s on a formula simplification. DAG size of input: 128 DAG size of output: 128 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 14:03:47,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 14:03:47,683 INFO L93 Difference]: Finished difference Result 429865 states and 2267962 transitions. [2022-11-21 14:03:47,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-21 14:03:47,686 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 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 24 [2022-11-21 14:03:47,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 14:03:53,039 INFO L225 Difference]: With dead ends: 429865 [2022-11-21 14:03:53,039 INFO L226 Difference]: Without dead ends: 429865 [2022-11-21 14:03:53,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 98.4s TimeCoverageRelationStatistics Valid=1069, Invalid=1901, Unknown=0, NotChecked=0, Total=2970 [2022-11-21 14:03:53,055 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 6705 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 5360 mSolverCounterSat, 398 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6705 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 5770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 5360 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.2s IncrementalHoareTripleChecker+Time [2022-11-21 14:03:53,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6705 Valid, 582 Invalid, 5770 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [398 Valid, 5360 Invalid, 12 Unknown, 0 Unchecked, 48.2s Time] [2022-11-21 14:03:53,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429865 states. [2022-11-21 14:04:00,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429865 to 27242. [2022-11-21 14:04:00,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27242 states, 27232 states have (on average 5.160913631022327) internal successors, (140542), 27241 states have internal predecessors, (140542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:04:00,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27242 states to 27242 states and 140542 transitions. [2022-11-21 14:04:00,365 INFO L78 Accepts]: Start accepts. Automaton has 27242 states and 140542 transitions. Word has length 24 [2022-11-21 14:04:00,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 14:04:00,366 INFO L495 AbstractCegarLoop]: Abstraction has 27242 states and 140542 transitions. [2022-11-21 14:04:00,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 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) [2022-11-21 14:04:00,366 INFO L276 IsEmpty]: Start isEmpty. Operand 27242 states and 140542 transitions. [2022-11-21 14:04:00,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-21 14:04:00,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 14:04:00,844 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1] [2022-11-21 14:04:00,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 14:04:01,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 14:04:01,044 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-21 14:04:01,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:04:01,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1515087816, now seen corresponding path program 4 times [2022-11-21 14:04:01,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 14:04:01,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100733944] [2022-11-21 14:04:01,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 14:04:01,045 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 [2022-11-21 14:04:01,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 14:04:01,046 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 14:04:01,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ec0e281-1aa3-4bf3-85a4-23613bef45ef/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 14:04:01,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 14:04:01,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 14:04:01,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-21 14:04:01,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:04:01,494 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 14:04:01,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-21 14:04:03,164 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 14:04:03,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:04:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 14:04:16,919 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 14:04:16,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100733944] [2022-11-21 14:04:16,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100733944] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:04:16,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 14:04:16,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2022-11-21 14:04:16,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019145979] [2022-11-21 14:04:16,920 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 14:04:16,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-21 14:04:16,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 14:04:16,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-21 14:04:16,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2022-11-21 14:04:16,922 INFO L87 Difference]: Start difference. First operand 27242 states and 140542 transitions. Second operand has 48 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:04:45,501 WARN L233 SmtUtils]: Spent 16.41s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 14:05:10,063 WARN L233 SmtUtils]: Spent 22.18s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 14:05:35,538 WARN L233 SmtUtils]: Spent 22.78s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 14:05:56,112 WARN L233 SmtUtils]: Spent 17.79s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)